#3f5d66

Color #3f5d66

A muted dark cyan.

Closest named color Dark Slate Gray #2f4f4f · ΔE 8.63 Nearest Tailwind class mist-600 #4b585b · ΔE 5.5

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

Conversions

HEX

#3f5d66

RGB

rgb(63, 93, 102)

HSL

hsl(193.8, 23.6%, 32.4%)

HSV / HSB

hsv(193.8, 38.2%, 40%)

CMYK

cmyk(38.2%, 8.8%, 0%, 60%)

LAB

lab(37.56, -8.49, -8.66)

LCH

lch(37.56, 12.13, 225.57)

OKLCH

oklch(45.8%, 0.0382, 218.52)

HWB

hwb(193.8, 24.7%, 60%)

Harmony colors

Complementary

#66483f

Analogous

#3f665c

#3f5d66

#3f4a66

Triadic

#3f5d66

#663f5d

#5d663f

Split-complementary

#3f5d66

#663f4a

#665c3f

Tetradic

#3f5d66

#483f66

#66483f

#5d663f

Square

#3f5d66

#5c3f66

#66483f

#4a663f

Shades

Color #3f5d66 mixed toward black.

#354e55

#2a3e44

#202f33

#151f22

#0b1011

Tints

Color #3f5d66 mixed toward white.

#557e8a

#719ba7

#94b4bd

#b8cdd3

#dbe6e9

Tones

Color #3f5d66 mixed toward gray.

#425b63

#465a60

#49585c

#4c5659

#4f5456

Accessibility

Aa White text on this color

7.07:1

Aa Black text on this color

2.97:1

White text reads better on this background (7.07:1). That passes WCAG AAA (≥7:1) for normal-size text.

Under color vision deficiencies

Protanopia

#4e4e64 · ΔE 16.6

Deuteranopia

#4c4a63 · ΔE 18.3

Tritanopia

#416262 · ΔE 5.4

Achromatopsia

#585858 · ΔE 11.4

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

Code

CSS

background-color: #3f5d66;

Tailwind (arbitrary value)

bg-[#3f5d66]

Related colors

Light Blue #add8e6

Deep Sky Blue #00bfff

Sky Blue #87ceeb

Powder Blue #b0e0e6

Light Sky Blue #87cefa

Charcoal #36454f

Frequently asked questions

#3f5d66 (#3f5d66) is rgb(63, 93, 102) in RGB.

No, #3f5d66 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 #3f5d66, or check how it holds up for accessibility.

Generate a palette → Check contrast