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1B00A3

#1B00A3 closest to Cobalt

#1B00A3 is a dark, vivid blue; the closest named color is Cobalt. In the RGB color model it is made of 10.6% red, 0.0% green and 63.9% blue (rgb(27, 0, 163)). Its HSL value is 250° hue, 100% saturation and 32% lightness, and in CMYK it is 83% cyan, 100% magenta, 0% yellow and 36% black. #1B00A3 is a cool color. White text reads best on it, with a contrast ratio of 13.33:1.

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#1B00A3 color conversion

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Variations of #1B00A3

Shades

Mixed with black: richer and darker.

1B00A316008D1100780C006308004F05003C02002A01001900000A000001

Tints

Mixed with white: lighter and softer.

1B00A32530AE374BB94B63C4627ACE7A90D793A6E0ADBCE9C8D2F1E3E9F8

Tones

Mixed with gray: calmer and more muted.

1B00A31E21A125329F2D3F9C374A9A4255964E5E935A678F66708B737886

Hues

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

003D4C003C52003A59003764002F7B1B00A32F00983D008D480081500074570067

Temperatures

Cooler on the left, warmer on the right.

1A26B61B21B21B1BAE1B14AB1B0BA71B00A32018A126269F2E2F9D36389A3F3F98

#1B00A3 color harmonies

Complementary

The opposite hue — maximum contrast and energy.

1B00A388A300
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Split complementary

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

1B00A3A36D0036A300
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Analogous

Neighbouring hues — calm, cohesive and natural.

1B00A30036A36D00A3
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Triadic

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

1B00A3A31B0000A31B
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Tetradic

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

1B00A3A3008888A30000A31B
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Square

Four hues spaced at 90° — bold and playful.

1B00A3A3003688A30000A36D
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#1B00A3 for color-blind viewers (and dogs)

How #1B00A3 appears with each type of color vision deficiency (Machado 2009 model) — and to your dog. Try the dog vision simulator →

  • Dog vision 92% similarHow dogs see it · simulated as #0027A1
  • Protanopia 85% similar1.3% of men, 0.02% of women · simulated as #0037A7
  • Protanomaly 90% similar1.3% of men, 0.02% of women · simulated as #002DA5
  • Deuteranopia 92% similar1.2% of men, 0.01% of women · simulated as #0027A1
  • Deuteranomaly 94% similar5% of men, 0.35% of women · simulated as #0021A2
  • Tritanopia 68% similar0.001% of men, 0.03% of women · simulated as #00415E
  • Tritanomaly 88% similar0.0001% of men, 0.0001% of women · simulated as #002989
  • Achromatopsia 56% similar0.003% of men, 0.003% of women · simulated as #2F2F2F
  • Achromatomaly 74% similar0.001% of men, 0.001% of women · simulated as #2B285E

#1B00A3 contrast checker

AaThe quick brown fox jumps over the lazy dog.
13.33:1 Super#1B00A3 text on white
AA normalPassAAA normalPass
AA largePassAAA largePass
AaThe quick brown fox jumps over the lazy dog.
1.58:1 Very poor#1B00A3 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 #1B00A3

Palettes with #1B00A3

#1B00A3 in CSS

/* Cobalt */
.color { color: #1B00A3; }
.background { background-color: #1B00A3; }
.border { border: 1px solid #1B00A3; }

/* Other notations */
color: rgb(27 0 163);
color: hsl(250 100% 32%);
color: oklch(0.333 0.218 270.1);

#1B00A3 FAQ

What color is #1B00A3?

#1B00A3 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 #1B00A3?

#1B00A3 is rgb(27, 0, 163) in RGB, hsl(250, 100%, 32%) in HSL and cmyk(83%, 100%, 0%, 36%) in CMYK.

What is the complementary color of #1B00A3?

The complementary color of #1B00A3 is #88A300, which sits opposite it on the color wheel.

Which text color works on #1B00A3?

White text has the best contrast on #1B00A3: 13.33:1, which meets the WCAG AA requirement of 4.5:1 for normal text.

Is #1B00A3 a warm or cool color?

#1B00A3 is a cool color.