#231d57

Color #231d57

A moderately saturated dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 18.18 Nearest Tailwind class indigo-950 #1e1a4d · ΔE 2

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Conversions

HEX

#231d57

RGB

rgb(35, 29, 87)

HSL

hsl(246.2, 50%, 22.7%)

HSV / HSB

hsv(246.2, 66.7%, 34.1%)

CMYK

cmyk(59.8%, 66.7%, 0%, 65.9%)

LAB

lab(15.08, 21.4, -34.28)

LCH

lch(15.08, 40.41, 301.98)

OKLCH

oklch(27.7%, 0.1007, 282.27)

HWB

hwb(246.2, 11.4%, 65.9%)

Harmony colors

Complementary

#51571d

Analogous

#1d3457

#231d57

#401d57

Triadic

#231d57

#57231d

#1d5723

Split-complementary

#231d57

#57401d

#34571d

Tetradic

#231d57

#571d51

#51571d

#1d5723

Square

#231d57

#571d34

#51571d

#1d5740

Shades

Color #231d57 mixed toward black.

#1d1848

#17133a

#110e2b

#0c0a1d

#06050e

Tints

Color #231d57 mixed toward white.

#372d88

#4b3eb9

#756bce

#a39cde

#d1ceef

Tones

Color #231d57 mixed toward gray.

#272252

#2b274d

#2e2b48

#323044

#36353f

Accessibility

Aa White text on this color

15.16:1

Aa Black text on this color

1.38:1

White text reads better on this background (15.16:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#21204e · ΔE 3

Deuteranopia

#21214b · ΔE 4

Tritanopia

#234543 · ΔE 26.8

Achromatopsia

#262626 · ΔE 22.1

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

Code

CSS

background-color: #231d57;

Tailwind (arbitrary value)

bg-[#231d57]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#231d57 (#231d57) is rgb(35, 29, 87) in RGB.

No, #231d57 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.

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Contrast Checker

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

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Palette Generator

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

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Build something with this color

Generate a full palette from #231d57, or check how it holds up for accessibility.

Generate a palette → Check contrast