Brand
Donkerblauw#154273
primary actions, headings, brand
Hemelblauw#007BC7
links, focus, interactive state
Lichtblauw#8FCAE7
fills, rules, chart bands
Papier#F4F6F9
page ground; surfaces are white
Donkerblauw on papier is 11.4:1 — well past AAA. Hemelblauw on white is 4.6:1: fine for links and text from 16 px, never for small print or thin rules. Lichtblauw is never a text colour.
Neutral ramp
100
200
300
400
500
600
700
800
900
Accent — donkerblauw
100
200
300
400
500
600
700
800
900
Accent 2 — hemelblauw
100
200
300
400
500
600
700
800
900
Semantic
Succes#217A3F
operational, 2xx, verified
Waarschuwing#A35B00
degraded, quota near limit, 4xx
Fout#AD2015
outage, revoked, 5xx
Info#007BC7
notices, maintenance windows
HTTP methods — fixed, never restyled per screen
GETPOSTPUTPATCHDELETEHEAD
Method colour is semantic, not decorative: a developer scanning a reference should recognise a destructive call before reading it. PUT and PATCH share the warning family; HEAD and OPTIONS take the neutral.