Copenhagen Blue
Registry ID
GCR-2025-21638B
Issued December 7, 2025
Color data
HEX #21638B
RGB 33 / 99 / 139
HSL 203° / 62% / 34%
CMYK 76 / 29 / 0 / 45
opencolors.org/certificate/21638B
The registry ID is GCR, the year the color was named, and its hex.
Registry ID
GCR-2025-21638B
Issued December 7, 2025
Color data
HEX #21638B
RGB 33 / 99 / 139
HSL 203° / 62% / 34%
CMYK 76 / 29 / 0 / 45
opencolors.org/certificate/21638B
White text
6.52:1 · AA
Black text
3.22:1 · Fail
CSS
--copenhagen-blue: #21638B;
Tailwind
bg-[#21638B]
Token
{
"copenhagen-blue": {
"value": "#21638B"
}
}