#281f81

Color #281f81

A moderately saturated dark blue.

Closest named color Midnight Blue #191970 · ΔE 6.99 Nearest Tailwind class indigo-900 #312c85 · ΔE 3.5

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Conversions

HEX

#281f81

RGB

rgb(40, 31, 129)

HSL

hsl(245.5, 61.2%, 31.4%)

HSV / HSB

hsv(245.5, 76%, 50.6%)

CMYK

cmyk(69%, 76%, 0%, 49.4%)

LAB

lab(20.11, 35.71, -53.42)

LCH

lch(20.11, 64.26, 303.76)

OKLCH

oklch(32.7%, 0.1556, 277.49)

HWB

hwb(245.5, 12.2%, 49.4%)

Harmony colors

Complementary

#78811f

Analogous

#1f4781

#281f81

#591f81

Triadic

#281f81

#81281f

#1f8128

Split-complementary

#281f81

#81591f

#47811f

Tetradic

#281f81

#811f78

#78811f

#1f8128

Square

#281f81

#811f47

#78811f

#1f8159

Shades

Color #281f81 mixed toward black.

#211a6c

#1b1556

#141041

#0d0a2b

#070516

Tints

Color #281f81 mixed toward white.

#372ab0

#5043d2

#7c72dd

#a8a1e8

#d3d0f4

Tones

Color #281f81 mixed toward gray.

#2f2779

#352f71

#3c3869

#434060

#494858

Accessibility

Aa White text on this color

13.1:1

Aa Black text on this color

1.6:1

White text reads better on this background (13.1:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#242472 · ΔE 3.4

Deuteranopia

#25266f · ΔE 4.3

Tritanopia

#286562 · ΔE 34

Achromatopsia

#313131 · ΔE 26.4

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

Code

CSS

background-color: #281f81;

Tailwind (arbitrary value)

bg-[#281f81]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#281f81 (#281f81) is rgb(40, 31, 129) in RGB.

No, #281f81 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 #281f81, or check how it holds up for accessibility.

Generate a palette → Check contrast