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2100A9

#2100A9 closest to Cobalt

#2100A9 is a dark, vivid blue; the closest named color is Cobalt. In the RGB color model it is made of 12.9% red, 0.0% green and 66.3% blue (rgb(33, 0, 169)). Its HSL value is 252° hue, 100% saturation and 33% lightness, and in CMYK it is 80% cyan, 100% magenta, 0% yellow and 34% black. #2100A9 is a cool color. White text reads best on it, with a contrast ratio of 12.82:1.

Make a palette with #2100A9

#2100A9 color conversion

HEX
RGB
HSL
HSB / HSV
HWB
CMYK
XYZ
CIELAB
CIELCh
CIELUV
OKLCH

Variations of #2100A9

Shades

Mixed with black: richer and darker.

2100A91B009216007C1000670B005306003F03002C01001B00000A000001

Tints

Mixed with white: lighter and softer.

2100A92C31B43C4DBE5064C8667BD27D91DB96A7E3AFBDEBC9D3F2E4E9F9

Tones

Mixed with gray: calmer and more muted.

2100A92422A62A33A43240A03B4B9D465599505F955C689168708C747886

Hues

The same lightness and chroma, rotated around the color wheel.

004050003F57003D5F003A6C002F882100A935009E4200924D00855500785D006A

Temperatures

Cooler on the left, warmer on the right.

2127BB2122B7211CB42114B0210BAD2100A92619A72C26A43330A23B389F43409D

#2100A9 color harmonies

Complementary

The opposite hue — maximum contrast and energy.

2100A988A900
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Split complementary

The two hues next to the complement — contrast with less tension.

2100A9A9750034A900
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Analogous

Neighbouring hues — calm, cohesive and natural.

2100A90033A97500A9
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Triadic

Three hues evenly spaced at 120° — vibrant yet balanced.

2100A9A9210000A921
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Tetradic

Two complementary pairs — rich, best with one dominant color.

2100A9A9008888A90000A921
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Square

Four hues spaced at 90° — bold and playful.

2100A9A9003488A90000A975
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#2100A9 for color-blind viewers (and dogs)

How #2100A9 appears with each type of color vision deficiency (Machado 2009 model) — and to your dog. Try the dog vision simulator →

  • Dog vision 91% similarHow dogs see it · simulated as #002AA7
  • Protanopia 85% similar1.3% of men, 0.02% of women · simulated as #0039AD
  • Protanomaly 89% similar1.3% of men, 0.02% of women · simulated as #0030AB
  • Deuteranopia 91% similar1.2% of men, 0.01% of women · simulated as #002AA7
  • Deuteranomaly 93% similar5% of men, 0.35% of women · simulated as #0024A8
  • Tritanopia 66% similar0.001% of men, 0.03% of women · simulated as #004461
  • Tritanomaly 88% similar0.0001% of men, 0.0001% of women · simulated as #002A8E
  • Achromatopsia 55% similar0.003% of men, 0.003% of women · simulated as #323232
  • Achromatomaly 74% similar0.001% of men, 0.001% of women · simulated as #2E2B62

#2100A9 contrast checker

AaThe quick brown fox jumps over the lazy dog.
12.82:1 Super#2100A9 text on white
AA normalPassAAA normalPass
AA largePassAAA largePass
AaThe quick brown fox jumps over the lazy dog.
1.64:1 Very poor#2100A9 text on black
AA normalFailAAA normalFail
AA largeFailAAA largeFail

Need another background? Pick any pair in the palette generator and open the contrast panel.

Colors similar to #2100A9

Palettes with #2100A9

#2100A9 in CSS

/* Cobalt */
.color { color: #2100A9; }
.background { background-color: #2100A9; }
.border { border: 1px solid #2100A9; }

/* Other notations */
color: rgb(33 0 169);
color: hsl(252 100% 33%);
color: oklch(0.344 0.223 271.6);

#2100A9 FAQ

What color is #2100A9?

#2100A9 is a dark, vivid blue. Its closest named color is Cobalt. It belongs to the blue color family and is a cool color.

What is the RGB value of #2100A9?

#2100A9 is rgb(33, 0, 169) in RGB, hsl(252, 100%, 33%) in HSL and cmyk(80%, 100%, 0%, 34%) in CMYK.

What is the complementary color of #2100A9?

The complementary color of #2100A9 is #88A900, which sits opposite it on the color wheel.

Which text color works on #2100A9?

White text has the best contrast on #2100A9: 12.82:1, which meets the WCAG AA requirement of 4.5:1 for normal text.

Is #2100A9 a warm or cool color?

#2100A9 is a cool color.