Information about #A21C10 color

#A21C10 color image

Basic facts about this digital color

The digital color #A21C10 is classified in the Register under the Red Color Family, with High Saturation and Neutral brightness. Its exact recipe is rgb(162, 28, 16) — 63.5% red, 11% green, 6.3% blue — and for print it converts to CMYK 0 / 53 / 57 / 36. New to color codes? See our guide to RGB color codes.

A vivid, lively warm red, #A21C10 occupies the middle of the lightness scale. Designers typically reach for tones like this for logos, highlights and anything that needs to be noticed first. In The Official Register of Color Names it is a hair away from Pulse (#A41D19). Slightly further away sit Rufous (#A81C07) and Tabasco (#A02712).

Technically, the mix leans on its red channel (rgb(162, 28, 16)), which gives #A21C10 its character. On this background, white text reaches a 7.7:1 contrast ratio (passing WCAG AAA); black stays at 2.7:1. #A21C10 has no official name yet. If this shade means something to you, you can be the one to name it.

#A21C10 color variations

View this color variations of tints, shades, tones and hues.

#A21C10 color harmonies

Color harmonies are pleasing color schemes created according to their position on a color wheel.

Complementary

Complementary color schemes are made by picking two opposite colors con the color wheel. They appear vibrant near to each other.

Complementary color schemes

Split complementary

Split complementary schemes are like complementary but they uses two adiacent colors of the complement. They are more flexible than complementary ones.

Split complementary color scheme

Analogous

Analogous color schemes are made by picking three colors that are next to each other on the color wheel. They are perceived as calm and serene.

Analogous color scheme

Triadic

Triadic color schemes are created by picking three colors equally spaced on the color wheel. They appear quite contrasted and multicolored.

Triadic color scheme

Tetradic

Tetradic color schemes are made form two couples of complementary colors in a rectangular shape on the color wheel.

Tetradic color scheme

Square

Square color schemes are like tetradic arranged in a square instead of rectangle. Colors appear even more contrasting.

Square color scheme

Nearest named colors to #A21C10

The closest officially registered color names in the Register, ordered by similarity — your shade’s neighborhood is already being claimed.

Pulse color link
Pulse

#A41D19

Rufous color link
Rufous

#A81C07

Tabasco color link
Tabasco

#A02712

Burnt Red color link
Burnt Red

#9F2305

Vintage Red color link
Vintage Red

#AF2413

Red Thread color link
Red Thread

#A81900

Rust Red color link
Rust Red

#AA2704

Tomato Sauce color link
Tomato Sauce

#B21807

Ruby Red color link
Ruby Red

#9B111E

Conversions between color systems and etc.

  • HEX#A21C10
  • RGB162, 28, 16
  • CMYK0, 53, 57, 36
  • CSSrgb(162, 28, 16)
  • HSL5°, 82%, 35%
  • HSL Precise4.932°, 82.022%, 34.902%
  • HSV5°, 90%, 64%
  • HSB5°, 90%, 64%
  • Normalized R (0.0–1.0)0.635
  • Normalized G (0.0–1.0)0.110
  • Normalized B (0.0–1.0)0.063
  • GLSLvec3(0.635, 0.110, 0.063)
  • GLSL with alphavec4(0.635, 0.110, 0.063, 1.000)
  • HLSL / Metalfloat3(0.635, 0.110, 0.063)
  • Percentage of Red in RGB63.5%
  • Percentage of Green in RGB11%
  • Percentage of Blue in RGB6.3%
  • Color FamilyRed
  • Saturation FamilyHigh Saturation
  • Lightness FamilyNeutral
  • HEX IDA21C10
  • DECIMAL ID10624016
  • Name LengthThis color has no name
  • Seen by search & AI crawlers23 times
  • Counting from2025-01-01