Information about #21A9B5 color

#21A9B5 color image

Basic facts about this digital color

The digital color #21A9B5 is classified in the Register under the Cyan Color Family, with High Saturation and Light brightness. Its exact recipe is rgb(33, 169, 181) — 12.9% red, 66.3% green, 71% blue — and for print it converts to CMYK 58 / 5 / 0 / 29. New to color codes? See our guide to RGB color codes.

A energetic, saturated water-like cyan, #21A9B5 feels open and friendly. Designers typically reach for tones like this for bold branding moments and attention-grabbing details. In The Official Register of Color Names it is a near neighbor of Light Sea Green (#20B2AA). Its next-closest registered neighbors are Pelorous (#2599B2) and Pacific Blue (#1CA9C9).

In RGB terms — rgb(33, 169, 181) — the blue channel does the heavy lifting here. If you plan to put text on a #21A9B5 background, choose black — the contrast ratio is 7.4:1 (passing WCAG AAA), while white manages only 2.8:1. Like most of the 16.7 million digital colors, this one is still waiting for a name — naming it takes a minute.

#21A9B5 color variations

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

#21A9B5 color tints

Tints look brighter, pastel, and less intense.
#21A9B5

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#37CCDA

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#69D9E3

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#9BE5EC

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#CDF2F5

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White

#FFFFFF

#21A9B5 color shades

Shades look darker, richer, and more solid.
#21A9B5

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#1A8690

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#13656C

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#0D4348

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#062124

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Black

#000000

#21A9B5 color tones

Tones looks more sophisticated and complex than base colors.
#21A9B5

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#31A2AC

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#439BA2

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#569298

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#6A898C

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Grey

#808080

#21A9B5 color hues

A hue refers to the basic neighbors of color and is variation of base color on the color wheel.
#4B21B4

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#2132B4

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#216DB4

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#21A9B5

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#21B486

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#21B44B

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#32B421

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#21A9B5 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
#21A9B5
#21A9B5

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#B52E21
#B52E21

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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
#21A9B5
#21A9B5

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#B57721
#B57721

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#B5215F
#B5215F

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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
#215FB5
#215FB5

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#21A9B5
#21A9B5

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#21B577
#21B577

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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
#21A9B5
#21A9B5

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#B521A9
#B521A9

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#A9B521
#A9B521

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Tetradic

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

Tetradic color scheme
#21A9B5
#21A9B5

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#2E21B5
#2E21B5

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#B52E21
#B52E21

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#A9B521
#A9B521

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Square

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

Square color scheme
#21A9B5
#21A9B5

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#7721B5
#7721B5

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#B52E21
#B52E21

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#5FB521
#5FB521

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Nearest named colors to #21A9B5

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

Light Sea Green color link
Light Sea Green

#20B2AA

Pelorous color link
Pelorous

#2599B2

Pacific Blue color link
Pacific Blue

#1CA9C9

Homebox Blue color link
Homebox Blue

#36A2B9

AITriedPume color link
AITriedPume

#13B6A9

Tealish color link
Tealish

#24BCA8

Ball Blue color link
Ball Blue

#21ABCD

Spring Teal color link
Spring Teal

#0EA7A5

Blue Green color link
Blue Green

#0D98BA

Moonstone color link
Moonstone

#3AA8C1

Boy Red color link
Boy Red

#0E9CA5

Peacock color link
Peacock

#33A1C9

#21A9B5 color backgrounds & wallpapers

Download color wallpaper / background for your Desktop PC, Tablet or Mobile phone.

#21A9B5 color image #21A9B5 color ORCN HD wallpaper 3840x2160 (Desktop)
#21A9B5 color image #21A9B5 color ORCN HD wallpaper 1170x2532 (Mobile)
#21A9B5 color image #21A9B5 color solid HD wallpaper 3840x2160 (Desktop)
#21A9B5 color image #21A9B5 color solid HD wallpaper 1170x2532 (Mobile)

Conversions between color systems and etc.

  • HEX#21A9B5
  • RGB33, 169, 181
  • CMYK58, 5, 0, 29
  • CSSrgb(33, 169, 181)
  • HSL185°, 69%, 42%
  • HSL Precise184.865°, 69.159%, 41.961%
  • HSV185°, 82%, 71%
  • HSB185°, 82%, 71%
  • Normalized R (0.0–1.0)0.129
  • Normalized G (0.0–1.0)0.663
  • Normalized B (0.0–1.0)0.710
  • GLSLvec3(0.129, 0.663, 0.710)
  • GLSL with alphavec4(0.129, 0.663, 0.710, 1.000)
  • HLSL / Metalfloat3(0.129, 0.663, 0.710)
  • Percentage of Red in RGB12.9%
  • Percentage of Green in RGB66.3%
  • Percentage of Blue in RGB71%
  • Color FamilyCyan
  • Saturation FamilyHigh Saturation
  • Lightness FamilyLight
  • HEX ID21A9B5
  • DECIMAL ID2206133
  • Name LengthThis color has no name
  • Seen by search & AI crawlers24 times
  • Counting from2025-01-01

Copyright © 2021-2026 The Official Register of Color Names. All Rights Reserved.

ORCN is an independent private organisation that maintains a public register — not a governmental institution or an international standards organisation — in which a name is linked to a specific digital colour code. Registration gives the registrant the exclusive right, within the ORCN register, to have that name recorded against that colour code.

Important: a digital colour itself belongs to no one in law. That right exists only within the ORCN register: registration creates no ownership, trademark, copyright or design rights anywhere. Legal exclusivity outside the register, where it is available at all, arises separately under applicable trademark law and is generally limited to particular goods, services and jurisdictions.