Onyx Citron

A dark system. The ground and its surfaces are one neutral stepped in lightness, so the page never becomes one hue at nine brightnesses, and the accent carries real chroma so it can mean something when it appears.

Design an app with this

Roles

Ground#070A0C

Surface#15181B

Sunken#1B1F21

Raised#222628

Hairline#2E3235

Ink#F5FBFF

Muted#9EA4A9

Faint#747A7E

Accent#F6AE2D

On accent#070A0C

On ink#070A0C

Data colours

Left over after the roles were filled, and kept at full chroma. A chart series is not chrome: it keeps its own colour through a theme change, and these are the ones spoken for.

#4A6475

#33658A

#86BBD8

#F26419

Measured contrast

Ink: 19.0:1
Muted: 7.9:1
Faint: 4.6:1
Accent: 10.4:1
On accent: 10.4:1