#2100a4

Color #2100a4

A vivid, highly saturated dark blue.

Closest named color Dark Blue #00008b · ΔE 10.93 Nearest Tailwind class violet-900 #4d179a · ΔE 5.8

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

Conversions

HEX

#2100a4

RGB

rgb(33, 0, 164)

HSL

hsl(252.1, 100%, 32.2%)

HSV / HSB

hsv(252.1, 100%, 64.3%)

CMYK

cmyk(79.9%, 100%, 0%, 35.7%)

LAB

lab(20.06, 57.37, -75.24)

LCH

lch(20.06, 94.62, 307.33)

OKLCH

oklch(33.8%, 0.2172, 272.08)

HWB

hwb(252.1, 0%, 35.7%)

Harmony colors

Complementary

#83a400

Analogous

#0031a4

#2100a4

#7300a4

Triadic

#2100a4

#a42100

#00a421

Split-complementary

#2100a4

#a47300

#31a400

Tetradic

#2100a4

#a40083

#83a400

#00a421

Square

#2100a4

#a40031

#83a400

#00a473

Shades

Color #2100a4 mixed toward black.

#1c0089

#16006d

#110052

#0b0037

#06001b

Tints

Color #2100a4 mixed toward white.

#2d00de

#4718ff

#7552ff

#a38cff

#d1c5ff

Tones

Color #2100a4 mixed toward gray.

#290e97

#311b89

#3a297b

#42376d

#4a4460

Accessibility

Aa White text on this color

13.12:1

Aa Black text on this color

1.6:1

White text reads better on this background (13.12:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#171791 · ΔE 3.8

Deuteranopia

#191b8b · ΔE 5

Tritanopia

#207f7a · ΔE 43

Achromatopsia

#303030 · ΔE 30.3

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

Code

CSS

background-color: #2100a4;

Tailwind (arbitrary value)

bg-[#2100a4]

Related colors

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Slate Blue #6a5acd

Medium Purple #9370db

Navy #000080

Lavender #e6e6fa

Frequently asked questions

#2100a4 (#2100a4) is rgb(33, 0, 164) in RGB.

No, #2100a4 is not one of the 216 web-safe colors — for that, every RGB channel would have to be a multiple of 51.

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 #2100a4, or check how it holds up for accessibility.

Generate a palette → Check contrast