Accessibility / Contrast Ratios
WCAG 2.1 Contrast Ratios
All text must meet WCAG 2.1 AA minimum (4.5:1 for body text, 3:1 for large text/headings).
Blue
White
5.6:1
AA ✓
AAA ✕
Dark blue
White
19.6:1
AA ✓
AAA ✓
Light blue
Dark blue
15.3:1
AA ✓
AAA ✓
Honey
Dark blue
11.4:1
AA ✓
AAA ✓
Pale
Dark blue
17.1:1
AA ✓
AAA ✓
Beige
Dark blue
18.7:1
AA ✓
AAA ✓
Pink
Dark blue
14.2:1
AA ✓
AAA ✓
Mint
Dark blue
16.9:1
AA ✓
AAA ✓
Red
White
4.5:1
AA ✓
AAA ✕
Colour Usage Rules
✓
DO
White on Blue ✓
Dark blue on Light blue ✓
Blue on Beige ✓
✕
DON'T
Low contrast text ✕
Off-brand colour ✕
No contrast ✕
What Not To Do
✕
Don't use low-contrast text
Avoid light grays or small fonts on white backgrounds. Text must be easily readable by all users.
Example: Low Contrast Text
✕
Don't introduce off-brand colours
Stick to the defined palette. Adding neon greens or random purples dilutes the brand identity.
✕
✕
Don't rely on colour alone
Meaning should always be reinforced with icons or text labels for accessibility.
✕
Don't use clashing backgrounds
Never place brand blue on vibrating, off-brand backgrounds. Use approved neutral surfaces.
Blue on Black (CLASH)