Move at AI speed. Stay in control.

Runtime control for AI-era software — feature flags, experimentation, and AI agent control in one platform.

Colors

Primary

Electric Lime

#EBFF38

Brand, CTAs

Blue

#405BFF

Targeting, links

Near-Black

#191919

Dark page

Off-White

#F8F8F8

Light page

Accent

Lime Alt

#DDFF46

Highlights

Periwinkle

#7581EE

Accent

Pink

#E75FA4

Accent, error

Orange

#FF9D29

Warning

Surfaces — Dark (real near-black)

Deepest

#101010

Wells

Page

#191919

Background

Surface

#212121

Cards

Border

#2E2E2E

Dividers

Flag State & Semantic

Targeting On

#405BFF

Toggle on

Serving true

#00C48C

Success variation

Off / false

#707070

Disabled

Error

#E75FA4

Destructive

Typography — Inter ≈ LaunchDarkly Sans · JetBrains Mono

Ship with control

40px800Inter

Feature flags & experiments

27px700lh 1.1

Targeting rules

20px600lh 1.3

body

Wrap any change in a flag, roll it out to a percentage of users, and instantly turn it off if something breaks.

15px400lh 1.6

key

flags.variation("new-checkout-flow", user, false)

13pxJetBrains Mono

Signature — Feature Flags

Feature flags

Components

Buttons

Toggles

Variations

true false Rollout 50%

Environments

Production Staging

Guardrails

Use electric lime #EBFF38 for brand accent and primary CTAs

Use blue #405BFF for the targeting-on toggle and interactive state

Keep flag keys, variations, and targeting rules in the mono stack

Show each environment's flag state independently

Keep surfaces near-black neutral so lime and blue lead

DON'T

Don't fill the wordmark with lime — it stays an accent

Don't invent navy dark surfaces; LaunchDarkly's dark is neutral

Don't use lime for destructive or error states

Don't set flag keys or variations in a proportional font

Don't imply a flag is global — always scope it to an environment