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In the registryIssued December 7, 2025GCR-2025-33476D

The registry ID is GCR, the year the color was named, and its hex.

Hydrogen Blue certificate

Hydrogen Blue

Registry ID

GCR-2025-33476D

Issued December 7, 2025

Color data

HEX #33476D

RGB 51 / 71 / 109

HSL 219° / 36% / 31%

CMYK 53 / 35 / 0 / 57

opencolors.org/certificate/33476D

Using this color

Aa

White text

9.28:1 · AAA

Aa

Black text

2.26:1 · Fail

Suggested pairings

Complement#6C5833
Analogous +30°#3B336C
Analogous −30°#33636C

Copy for a project

CSS

--hydrogen-blue: #33476D;

Tailwind

bg-[#33476D]

Token

{
  "hydrogen-blue": {
    "value": "#33476D"
  }
}