#a90100

Color #a90100

A vivid, highly saturated dark red.

Closest named color Firebrick #b22222 · ΔE 12.6 Nearest Tailwind class red-800 #9f0712 · ΔE 4.2

Open in Palette generator Color wheel Color mixer Contrast checker Blindness simulator Gradient

Conversions

HEX

#a90100

RGB

rgb(169, 1, 0)

HSL

hsl(0.4, 100%, 33.1%)

HSV / HSB

hsv(0.4, 100%, 66.3%)

CMYK

cmyk(0%, 99.4%, 100%, 33.7%)

LAB

lab(34.92, 58.73, 49.19)

LCH

lch(34.92, 76.61, 39.95)

OKLCH

oklch(46.2%, 0.189, 29.3)

HWB

hwb(0.4, 0%, 33.7%)

Harmony colors

Complementary

#00a8a9

Analogous

#a90053

#a90100

#a95600

Triadic

#a90100

#00a901

#0100a9

Split-complementary

#a90100

#00a956

#0053a9

Tetradic

#a90100

#a8a900

#00a8a9

#0100a9

Square

#a90100

#53a900

#00a8a9

#5600a9

Shades

Color #a90100 mixed toward black.

#8d0100

#710100

#540100

#380000

#1c0000

Tints

Color #a90100 mixed toward white.

#e20200

#ff1d1c

#ff5654

#ff8e8d

#ffc7c6

Tones

Color #a90100 mixed toward gray.

#9b0f0e

#8d1d1c

#7f2b2a

#713938

#624746

Accessibility

Aa White text on this color

7.8:1

Aa Black text on this color

2.69:1

White text reads better on this background (7.8:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#828200 · ΔE 47.1

Deuteranopia

#889000 · ΔE 52.1

Tritanopia

#a50000 · ΔE 0.8

Achromatopsia

#525252 · ΔE 28.2

Left half is the original, right half is the simulated appearance. See all 8 vision types →

Code

CSS

background-color: #a90100;

Tailwind (arbitrary value)

bg-[#a90100]

Related colors

Red #ff0000

Maroon #800000

Black #000000

Brown #a52a2a

Dark Gray #a9a9a9

Dark Red #8b0000

Frequently asked questions

#a90100 (#a90100) is rgb(169, 1, 0) in RGB.

No, #a90100 is not web-safe. The nearest web-safe colors are among its tones and shades below.

Related tools

Colors

HEX to RGB Converter

Convert any HEX color code to its RGB and HSL equivalents, live, with copy-to-clipboard values.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #a90100, or check how it holds up for accessibility.

Generate a palette → Check contrast