Fellow 2026 · Design System

Intelligence,
built in the open.

A dark-first design language for Fellow Intelligence — learning, product, and studio — carried by bold grotesque type, one voltage-yellow action, and a single grainy electric-blue glow.

2
Accent colors
1
Signature glow
2
Modes · dark + light
3
Type families

Color

Two accents do all the talking. Voltage yellow is the single loud action; blue carries links, focus and the glow. Surfaces and text resolve by mode — toggle above to see both.

Brand & Accent
Aa
Voltage Gold
{colors.accent-voltage}
#efd46c
Aqua
{colors.accent-blue}
#93cedf
Aqua Bright
{colors.accent-blue-bright}
#61d1e6
Aqua Deep
{colors.accent-blue-deep}
#28a0da
Accent Ramps — semantic shades

Each accent is a small role-based ramp so you can reach for the right tone by intent and by background. tint / soft adapt to the surface via color-mix; link / hover resolve by mode (blue text brightens on charcoal for legibility). Toggle dark/light above to see them shift.

Blue Tint
{colors.accent-blue-tint}
adaptive · bg wash
Blue Soft
{colors.accent-blue-soft}
adaptive · soft fill
Blue · Default
{colors.accent-blue}
fills · focus · data
Blue Link
{colors.accent-blue-link}
by mode · text/links
Blue Hover
{colors.accent-blue-hover}
by mode · hover/press
Blue On
{colors.accent-blue-on}
#17150f · text on fill
Aa
Voltage · Default
{colors.accent-voltage}
#efd46c · the CTA fill
Voltage Hover
{colors.accent-voltage-hover}
#eccc50
Voltage Press
{colors.accent-voltage-press}
#e9c435
Voltage Soft
{colors.accent-voltage-soft}
adaptive · dark-only
Voltage Ink
{colors.accent-voltage-ink}
#17150f · text on gold
Blue link → Outlined Blue tint panel Blue fill Amber for warn-text →
Readability — which shade on which background
Voltage yellow is fill-only. Never as text on a neutral surface — it's illegible on both paper and charcoal. Text on yellow uses voltage-ink; for legible warn / emphasis text, use amber dash-warn (#e0952b).
Voltage-soft reads on charcoal but goes pale/invisible on paper → dark-mode only.
Aqua Default (#93cedf) is a light fill tone (dark blue-on ink ≈ 10.5:1). For text/links use blue-link (stays bright on charcoal ~11:1, darkens to teal #2b7990 on paper); for small text on paper use blue-hover (#226274 ≈ 6.2:1).
Blue Tint / Soft are backgrounds only — put only the accent's own text on them, never body copy.
Blue-on (#17150f) is the dark ink for text on an aqua fill — it's the fill's on-color, not for use on neutral surfaces.
Signature Glow Stops — glow only, never fills
Glow Cyan Edge
{colors.glow-cyan}
#8be4dd
Glow Core
{colors.glow-core}
#64bed9
Glow Deep
{colors.glow-deep}
#35a4e1
Glow Abyss
{colors.glow-abyss}
#09171f
Assembled glow
{component.glow-orb}
radial cyan → core → deep → abyss + grain
Signature Glow — Variations

Seven approved compositions of the glow. All are mode-aware: in light mode the sink fades to transparent (no dark smudge on paper) and the whole bloom drops to 55% opacity. Toggle dark/light above to compare.

Signature
cyan → core → deep
Aurora sweep
elongated top band
Corner bloom
single top-right
Spotlight
hot tight core
Vertical wash
top-down fade
Coral · cyan
tertiary duotone
Iris
concentric bands
Tertiary — data viz & category only
Coral
{colors.tertiary-coral}
#dc8375
Green
{colors.tertiary-green}
#6e9a4c
Cyan
{colors.tertiary-cyan}
#00e4f4
Surface & Text — resolves by mode (live)
Canvas
{colors.canvas}
Canvas Soft
{colors.canvas-soft}
Surface
{colors.surface}
Surface Elevated
{colors.surface-elevated}
Text Primary
{colors.on-dark} / {colors.ink}
Text Body
{colors.*-body} / {colors.body}
Text Muted
{colors.*-muted} / {colors.muted}
Surface Inverted
{colors.surface-inverted}

Type

Live from Adobe Fonts: ITC Avant Garde Gothic Pro for display; Scandia for body/UI; Nexa for technical labels — a geometric label voice in place of the previous monospace. Thai display uses Bai Jamjuree; Thai body uses Proxima Nova Thai Looped.

ITC Avant Garde · Adobe Fonts Scandia · Adobe Fonts Nexa · Adobe Fonts
display-mega · 72/700/-2.16
Fellow Aa
display-xl · 56/700/-1.4
Build in the open
display-lg · 40/700/-0.8
Section headline
display-md · 32/600/-0.48
Sub-section head
display-sm · 24/600/-0.24
Card group title
title-md · 20/600 · Scandia
Component title in Scandia
body-lg · 18/400 · Scandia
Lead paragraph in Scandia — clean and neutral against high-contrast display.
body-md · 16/400 · Scandia
Default running text sits comfortably at sixteen pixels.
label · 12/500 · Nexa
SECTION LABEL · V2.6 · 04:00
Thai & mixed · lang="th"
display · Thai fallback
ปัญญาประดิษฐ์ที่สร้างร่วมกัน
display · mixed TH + EN
Fellow · เรียนรู้ AI อย่างเข้าใจ
body · Thai fallback
ระบบดีไซน์ที่รองรับทั้งภาษาไทยและอังกฤษ โดยตัวอักษรละตินใช้ Scandia ส่วนภาษาไทยจะใช้ฟอนต์สำรอง (Proxima Nova Thai Looped) โดยอัตโนมัติ
label · Thai (no uppercase)
หมวดหมู่ · เวอร์ชัน 2.6

Radius

{rounded.xs}
4px · inline tags
{rounded.md}
10px · CTAs, inputs
{rounded.xl}
20px · feature cards
{rounded.xxl}
28px · glow cards
{rounded.pill}
9999px · badges

Spacing · base 4px

{spacing.xs}
8px
{spacing.base}
16px
{spacing.lg}
24px
{spacing.xxl}
48px
{spacing.section}
120px · section rhythm

Components

Buttons · Tags · Input
Badge pill V2.6 · Beta Selected Success Error
Feature cards · 3-up
Learn

AI literacy, taught well

Cohort courses and workshops that take teams from curious to capable.

Product

Agents that ship

A platform for building, evaluating and deploying reliable AI agents.

Studio

Brand & interface work

Design partnerships for teams launching intelligent products.

Signature

The grainy glow

One atmospheric moment per view — a radial blue bloom with grain, behind the copy. Never a button, never a background wash.

100%
Course completion
440+
Teams onboarded
30%
Lower inference cost
Faster to ship
Flops savingsDatalog AI
100%Baseline
72%V1
44%V2
30%Fellow
Course · Module 03

Prompting for reliable agents

68% complete12 min left
Emily Banni
Business Analyst

One yellow moment

Starter
Free
For individuals
  • Core learning tracks
  • Community access
  • 1 seat
Enterprise
Custom
For organizations
  • Everything in Team
  • SSO & security review
  • Dedicated studio partner

Core UI atoms

Buttons, form controls, chips, tabs and navigation atoms — the reusable kit every surface is built from. Toggle dark/light above; all states resolve by mode.

Buttons · variants
Buttons · sizes, icon, state
Form controls
As it should appear on your certificate.
Enter a valid email address.
Chips & filters
Tabs & segmented control
Breadcrumb & pagination Avatar, tooltip & dropdown menu
+6
Tooltip on the inverted surface

Feedback & overlays

System messaging — inline alerts, toasts, modals, drawers, empty and loading states. Semantic color carries meaning; the glow never appears here.

Inline alerts · info / success / warning / error
New cohort opens Monday
Enrolment for the July AI Literacy cohort is now open.
Payment received
Your team seats are active. A receipt is on the way.
Approaching seat limit
You've used 9 of 10 seats. Upgrade to add more.
Agent run failed
The evaluation timed out after 60s. Retry or reduce scope.
Toast
Course progress saved
Reconnecting to the agent…
Modal & drawer

Filters

Popover & empty state
Keyboard shortcut
Press ⌘K to open the command palette from anywhere.

No agents yet

Build your first agent to start evaluating and shipping. Templates make it a two-minute job.

Loading · spinner, skeleton, progress
66%
Upload · 44%
Complete

Cards & content blocks

The content library — testimonials, case studies, articles, people, lists and FAQs. All sit on surface with a hairline; one glow card maximum per view.

Testimonial & case study
"Fellow took our team from AI-curious to shipping evaluated agents in six weeks. The teaching is unusually clear."
Rita Suksan
VP Engineering · Datalog
Studio · Brand + Interface

Rebrand for an agent platform

A dark-first identity and product UI shipped in eight weeks.

Article / blog cards · 3-up
Guide

Prompting for reliable agents

Five patterns that cut hallucination in production.

Kamin · 6 min read
Research

Measuring model FLOPs savings

How we benchmarked a 70% reduction.

Emily · 9 min read
Studio

Designing in the dark

Why our system is dark-first, dual-mode.

Fellow · 4 min read
People & product
Kamin P.
Founder · Instructor
Product screenshot · 16 : 9
Product

Agent playground

Cohort list · rows
Emily Banni
Business Analyst · Datalog
Live
Rita Suksan
VP Engineering
Enrolled
Jane T.
Designer · Studio
Invited
FAQ · accordion
Do I need to code to take the courses?+
No. The AI Literacy track is built for non-engineers; the Agent Platform track assumes basic coding comfort.
Are the courses available in Thai?+
Yes — core tracks ship with Thai subtitles and Thai-language cohorts, set in Proxima Nova Thai Looped.
Can I switch plans later?+
Upgrade or downgrade anytime; changes are prorated to your billing cycle.

Data & tables

Charts, KPIs and tables. The primary series is the blue gradient; tertiary coral / green / cyan encode additional series only. Axis and metadata labels are Nexa.

KPI row
Completion
100%
▲ 12 pts
Teams
440
▲ 38
Inference cost
−30%
▲ better
Churn
2.1%
▼ 0.4
Line / area chart & donut
Weekly active learners+18% MoM
W1W2W3W4W5
55%
Learn
Revenue mix
Learning · 55% Product · 23% Studio · 22%
Data table
AgentStatusOwnerRunsSuccess
support-triageLiveEmily B.1,20498.2%
doc-summarizerDraftKamin P.31294.0%
flops-optimizerBetaRita S.8791.7%
thai-tutorOfflineJane T.2,56096.5%

Navigation & app shell

The product surface — sidebar, app shell, command palette, settings, mobile nav and the agent chat. Selected states use blue; the yellow action stays reserved for the single primary CTA.

App shell · sidebar + agent chat
Draft a reply that apologizes and offers a refund.
Fellow Agent
Here's a warm, on-brand reply that acknowledges the delay and offers a full refund with a one-tap link. Want me to add a discount code?
Yes, add 15% off their next order.
Command palette
ESC
Actions
Create new agent⌘N
Open analytics⌘A
Recent
support-triage
doc-summarizer
Mobile nav drawer & bottom tab bar Settings rows
Default mode
The theme new members see first.
Agent autopilot
Let agents act without confirmation on low-risk tasks.
Thai interface
Switch UI copy to Thai (Proxima Nova Thai Looped).
Delete workspace
Permanently remove this workspace and its data.

Marketing web sections

Full-width page blocks for the marketing site — promo bar, logo cloud, feature split, stats band, testimonials, newsletter and a comparison table.

Announcement / promo bar
New: the July AI Literacy cohort is open. Save your seat →
Logo cloud · trusted by
Trusted by teams shipping AI
DatalogNorthwindKirin AIMonsoonBluebird
Feature split
Product

Build, evaluate, and ship agents you can trust

A platform with evaluation baked in — so reliability isn't an afterthought. Start from a template and go to production in a day.

Stats band
440+
Teams onboarded
100%
Course completion
−30%
Inference cost
Faster to ship
Testimonial section · 3-up
"The clearest AI teaching we've found."
Rita S.
Datalog
"Our agents finally ship with confidence."
Max T.
Northwind
"The dark-first system just looks premium."
Jin L.
Kirin AI
Newsletter signup Comparison table
FeatureStarterTeamEnterprise
Core learning tracks
Agent platform
Studio design reviews
SSO & security review
Dedicated studio partner

Social & fixed-canvas graphics

Brand pieces at fixed dimensions. These are art-directed dark (or the single voltage moment) regardless of app mode — display type carries the message, the glow carries the atmosphere. Shown scaled.

Instagram · post 1080×1080 & story 1080×1920 Open Graph / link preview · 1200×630
Fellow 2026 · Design System
Intelligence, built in the open.
fellow.ai
Social banners · LinkedIn 1584×396 & X 1500×500

Banners & ads

Standard ad units and web banners at true proportions. One glow, one voltage action — the discipline holds at every size, down to a 160×600 skyscraper.

Web hero banner
Fellow · Learn
Bring intelligence to your team

Cohort courses that take teams from curious to capable.

Get started
Leaderboard · 728×90
Fellow Intelligence
AI Literacy, taught well
Enroll
leaderboard · 728×90
Rectangle 300×250 & skyscraper 160×600 Cookie / consent banner

Print collateral

Physical pieces at real proportions. Print is where the dual-mode system shows both faces — white paper as the reading room, near-black as the statement — with ITC Avant Garde carrying every headline.

Business card · front & back (3.5×2) Letterhead, certificate, poster & one-pager Certificate · landscape
Certificate of Completion
Emily Banni

has completed the AI Literacy track with distinction — July 2026.

Kamin P. · Instructor
Cohort 12

Stress test — dashboard patterns

Signature combinations ported from the Fellow Signal app: subject-coded metric cards with embedded mini-viz, score bands, enforcement-aware deadline badges, grading-status callouts and tag comparison. This is where the system gets pressure-tested.

What this stressed in the system
Four co-equal dashboard categories need four accents — mapped to blue + coral + green plus a new dashboard amber (--dash-warn #e0952b). The amber is deliberately not voltage yellow, so the single loud CTA stays reserved. Health states (good / warn / bad) also became their own tokens, separate from the semantic set.
Subject accents · category coding
Engagement Outcomes Operations Recognition
Tag filter bar + comparison strip
Filter by tag
Engineering
82.4
24 members · 91% active
Design
78.1
12 members · 100% active
Cohort 12
74.9
40 members · 88% active
Pilot
80.0
8 members · 75% active
Health row · one card per subject
Participation
Engagement
78%
of invited have started
Average score
Outcomes
76.43.2
across all graded work
Active sessions
Operations
8 open · 2 need attention
Top AI Champion
Recognition
1 ·Emily B.94
2 ·Rita S.91
3 ·Max T.88
Section · "Is it working?" — the full mini-viz set
Participation by type
Engagement
PEMCPRPC
Engagement funnel
Engagement
Invited 120 · Started 89 · Done 58
Score over time
Outcomes
+9 pts over 6 sessions
Dimension profile
Outcomes
Clarity
Context
Specificity
Needs attention
Operations
6people
flagged for a nudge
Grading credits
Operations
2.4k18%
used this period
Most improved
Recognition
1 ·Jane T.+21
2 ·Sam K.+18
3 ·Noi P.+15
Weekly active
Engagement
640
unique in last 7 days
Score bands + per-criterion breakdown
Proficiency scale
EmergingDevelopingProficientStrongExemplary
82/ 100 · Strong
Prompt evaluation · per criterion
Clarity of task18 / 20
Context completeness15 / 20
Specificity11 / 20
Deadline badges · enforcement-aware
Closed Opens in 2 days Due in 6 hours Due in 5 days
Grading status · incl. the amber "hold" tone
Graded instantly
Your score and feedback are shown below.
Quiz submitted
Results will be available when your instructor reveals them.
Draft saved — not yet graded
Project canvases are graded after the session closes. Your score will appear here when it's ready.

Slide / presentation designs

The system as a 16:9 deck — title, section divider, content, data, quote and closing. Slides are art-directed (dark + glow, or the single voltage moment) with ITC Avant Garde carrying every headline; one glow and one yellow per slide.

Six-slide deck
Fellow Intelligence · 2026
Intelligence,
built in the open.

Q3 review · Learning, Product & Studio

01 / 06
Section 01
01
Is it working?
02 / 06
Outcomes
Three things moved this quarter
  • Average score rose +9 points across cohorts
  • Completion hit 100% for the first time
  • Inference cost fell 30% after the V2 rollout
03 / 06
By the numbers
440+
Teams
100%
Completion
Faster
04 / 06
"
From AI-curious to shipping evaluated agents in six weeks.
Rita S. · Datalog05 / 06
Bring intelligence
to your team.
fellow.ai/start
06 / 06
Deck thumbnail strip · speaker/overview view
TitleBuilt in the open
Section01 · Is it working?
ContentThree things moved
DataBy the numbers
Quote"Six weeks…"
ClosingBring intelligence
06Example composition · CTA band
Ready when you are

Bring intelligence to your team.

Get started with Fellow