colourdesign.co.uk
Tetradic palette

Powder blue

A tetradic colour scheme built on #B0E0E6. Four hues evenly spaced at 90°. Rich, needs a dominant colour. A tinted neutral keeps text and surfaces consistent.

Primary#B0E0E6

Main brand colour. Use for headers, navigation, and primary buttons.

Secondary#B077D4

Companion colour. Use for links, highlights, and hover states.

Tertiary#D48277

Accent colour. Use for highlights, charts, and callouts.

Quaternary#9BD477

Accent colour. Use sparingly for calls to action and warnings.

Neutral#4B6468

Tinted neutral drawn from the seed hue. Use for body text, borders, and backgrounds.

Click a swatch to copy its hex code. Badges show WCAG contrast against white text and against dark text (#0F2A3F). AAA is 7:1 or higher. AA is 4.5:1 or higher. AA large is 3:1 or higher.

In use

Sample components show how the colours work together.

Buttons

Primary action Secondary Outline Call to action Confirm

Navigation

Powder blueWorkServicesAboutContact

Alerts

Information uses the secondary colour.
Success uses tertiary.
Warnings use quaternary.

Typography

Heading in primary

Body copy in neutral 500 on a white card. This keeps long text easy to read.

Muted caption text in neutral 300.

Links use primary 500

Dark surface

Primary 900 works as a footer or hero background. Secondary 300 gives headings lift without glare.

Get started

Chart colours

Export as CSS variables

Copy this block into your stylesheet, or link to b0e0e6-tetrad.css and b0e0e6-tetrad.json.

:root {
  --primary-50: #F7FCFC;
  --primary-100: #E7F6F8;
  --primary-300: #D0ECF0;
  --primary-500: #B0E0E6;
  --primary-700: #84A8AC;
  --primary-900: #587073;
  --secondary-50: #F7F1FB;
  --secondary-100: #E7D6F2;
  --secondary-300: #D0ADE5;
  --secondary-500: #B077D4;
  --secondary-700: #84599F;
  --secondary-900: #583C6A;
  --tertiary-50: #FBF2F1;
  --tertiary-100: #F2DAD6;
  --tertiary-300: #E5B4AD;
  --tertiary-500: #D48277;
  --tertiary-700: #9F6259;
  --tertiary-900: #6A413C;
  --quaternary-50: #F5FBF1;
  --quaternary-100: #E1F2D6;
  --quaternary-300: #C3E5AD;
  --quaternary-500: #9BD477;
  --quaternary-700: #749F59;
  --quaternary-900: #4E6A3C;
  --neutral-50: #EDF0F0;
  --neutral-100: #C9D0D2;
  --neutral-300: #93A2A4;
  --neutral-500: #4B6468;
  --neutral-700: #384B4E;
  --neutral-900: #263234;
}

Steps 50 to 300 are tints. Step 500 is the base colour. Steps 700 and 900 are shades.