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In the registryIssued December 7, 2025GCR-2025-55FF11

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

Poisonous certificate

Poisonous

Registry ID

GCR-2025-55FF11

Issued December 7, 2025

Color data

HEX #55FF11

RGB 85 / 255 / 17

HSL 103° / 100% / 53%

CMYK 67 / 0 / 93 / 0

opencolors.org/certificate/55FF11

Using this color

Aa

White text

1.34:1 · Fail

Aa

Black text

15.70:1 · AAA

Suggested pairings

Complement#BB0FFF
Analogous +30°#0FFF43
Analogous −30°#CBFF0F

Copy for a project

CSS

--poisonous: #55FF11;

Tailwind

bg-[#55FF11]

Token

{
  "poisonous": {
    "value": "#55FF11"
  }
}