Information about #21135D color

#21135D color image

Basic facts about this digital color

In the Register's classification, #21135D belongs to the Blue Color Family, featuring High Saturation and Dark brightness. In numbers: rgb(33, 19, 93) (12.9% red, 7.5% green, 36.5% blue), or CMYK 24 / 29 / 0 / 64 for print. Curious how these numbers work? Read our RGB color codes guide.

#21135D presents itself as a energetic, saturated deep-sea blue — one that leans clearly toward the dark side. It is a natural fit for night-mode interfaces and high-contrast pairings with light text. In The Official Register of Color Names it is almost identical to Suns Purple (#1D1160). Its next-closest registered neighbors are Dark Indigo (#1F0954) and Royal Indigo (#240952).

The recipe behind #21135D is rgb(33, 19, 93), with blue as the dominant ingredient. If you plan to put text on a #21135D background, choose white — the contrast ratio is 16.0:1 (passing WCAG AAA), while black manages only 1.3:1. On paper it relies strongly on black ink (K:64), so proof dark layouts before a large print run. Like most of the 16.7 million digital colors, this one is still waiting for a name — naming it takes a minute.

#21135D color variations

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

#21135D 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 #21135D

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

Suns Purple color link
Suns Purple

#1D1160

Dark Indigo color link
Dark Indigo

#1F0954

Royal Indigo color link
Royal Indigo

#240952

PHCH color link
PHCH

#201173

OSS Blue color link
OSS Blue

#1B2450

Deep Indigo color link
Deep Indigo

#160059

Blast Off color link
Blast Off

#262857

Paua color link
Paua

#2A2551

Conversions between color systems and etc.

  • HEX#21135D
  • RGB33, 19, 93
  • CMYK24, 29, 0, 64
  • CSSrgb(33, 19, 93)
  • HSL251°, 66%, 22%
  • HSL Precise251.351°, 66.071%, 21.961%
  • HSV251°, 80%, 36%
  • HSB251°, 80%, 36%
  • Normalized R (0.0–1.0)0.129
  • Normalized G (0.0–1.0)0.075
  • Normalized B (0.0–1.0)0.365
  • GLSLvec3(0.129, 0.075, 0.365)
  • GLSL with alphavec4(0.129, 0.075, 0.365, 1.000)
  • HLSL / Metalfloat3(0.129, 0.075, 0.365)
  • Percentage of Red in RGB12.9%
  • Percentage of Green in RGB7.5%
  • Percentage of Blue in RGB36.5%
  • Color FamilyBlue
  • Saturation FamilyHigh Saturation
  • Lightness FamilyDark
  • HEX ID21135D
  • DECIMAL ID2167645
  • Name LengthThis color has no name
  • Seen by search & AI crawlers14 times
  • Counting from2025-01-01