Information about #21215D color

#21215D color image

Basic facts about this digital color

#21215D falls into the Blue Color Family — Moderate Saturation, Dark brightness. The mix behind it: rgb(33, 33, 93) — 12.9% red, 12.9% green, 36.5% blue; the print equivalent is CMYK 24 / 24 / 0 / 64. New to color codes? See our guide to RGB color codes.

#21215D presents itself as a clearly saturated classic blue — one that stays on the darker end of the scale. In practice it works well for dark UI themes, backgrounds and dramatic accents. In The Official Register of Color Names it is a near neighbor of Blast Off (#262857). Slightly further away sit Dark Phthalo Blue (#272D59) and Dark Persian Blue (#2D2759).

Technically, the mix leans on its blue channel (rgb(33, 33, 93)), which gives #21215D its character. Accessibility-wise, white text works best on #21215D: 14.6:1 contrast (passing WCAG AAA) versus 1.4:1 for black. 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.

#21215D color variations

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

#21215D 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 #21215D

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

Blast Off color link
Blast Off

#262857

OSS Blue color link
OSS Blue

#1B2450

Space Cadet color link
Space Cadet

#1D2951

Delft Blue color link
Delft Blue

#1F305E

Paua color link
Paua

#2A2551

Suns Purple color link
Suns Purple

#1D1160

Paris M color link
Paris M

#312760

Biscay color link
Biscay

#1B3162

Conversions between color systems and etc.

  • HEX#21215D
  • RGB33, 33, 93
  • CMYK24, 24, 0, 64
  • CSSrgb(33, 33, 93)
  • HSL240°, 48%, 25%
  • HSL Precise240°, 47.619%, 24.706%
  • HSV240°, 65%, 36%
  • HSB240°, 65%, 36%
  • Normalized R (0.0–1.0)0.129
  • Normalized G (0.0–1.0)0.129
  • Normalized B (0.0–1.0)0.365
  • GLSLvec3(0.129, 0.129, 0.365)
  • GLSL with alphavec4(0.129, 0.129, 0.365, 1.000)
  • HLSL / Metalfloat3(0.129, 0.129, 0.365)
  • Percentage of Red in RGB12.9%
  • Percentage of Green in RGB12.9%
  • Percentage of Blue in RGB36.5%
  • Color FamilyBlue
  • Saturation FamilyModerate Saturation
  • Lightness FamilyDark
  • HEX ID21215D
  • DECIMAL ID2171229
  • Name LengthThis color has no name
  • Seen by search & AI crawlers10 times
  • Counting from2025-01-01