#423a78

Color #423a78

A muted dark blue.

Closest named color Dark Slate Blue #483d8b · ΔE 9.82 Nearest Tailwind class indigo-900 #312c85 · ΔE 6.2

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

Conversions

HEX

#423a78

RGB

rgb(66, 58, 120)

HSL

hsl(247.7, 34.8%, 34.9%)

HSV / HSB

hsv(247.7, 51.7%, 47.1%)

CMYK

cmyk(45%, 51.7%, 0%, 52.9%)

LAB

lab(28.22, 20.45, -34.45)

LCH

lch(28.22, 40.06, 300.69)

OKLCH

oklch(38.9%, 0.1019, 286.59)

HWB

hwb(247.7, 22.7%, 52.9%)

Harmony colors

Complementary

#70783a

Analogous

#3a5178

#423a78

#613a78

Triadic

#423a78

#78423a

#3a7842

Split-complementary

#423a78

#78613a

#51783a

Tetradic

#423a78

#783a70

#70783a

#3a7842

Square

#423a78

#783a51

#70783a

#3a7861

Shades

Color #423a78 mixed toward black.

#373064

#2c2750

#211d3c

#161328

#0b0a14

Tints

Color #423a78 mixed toward white.

#564c9d

#746ab7

#978fc9

#b9b4db

#dcdaed

Tones

Color #423a78 mixed toward gray.

#463f73

#4a446e

#4d4a68

#514f63

#55545e

Accessibility

Aa White text on this color

9.96:1

Aa Black text on this color

2.11:1

White text reads better on this background (9.96:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#3f3f6d · ΔE 3.9

Deuteranopia

#3f406a · ΔE 4.9

Tritanopia

#426361 · ΔE 26.7

Achromatopsia

#434343 · ΔE 22

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

Code

CSS

background-color: #423a78;

Tailwind (arbitrary value)

bg-[#423a78]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#423a78 (#423a78) is rgb(66, 58, 120) in RGB.

No, #423a78 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 #423a78, or check how it holds up for accessibility.

Generate a palette → Check contrast