#666eb3

Color #666eb3

A muted medium blue.

Closest named color Cornflower Blue #6495ed · ΔE 18.67 Nearest Tailwind class slate-500 #62748e · ΔE 7.8

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Conversions

HEX

#666eb3

RGB

rgb(102, 110, 179)

HSL

hsl(233.8, 33.6%, 55.1%)

HSV / HSB

hsv(233.8, 43%, 70.2%)

CMYK

cmyk(43%, 38.5%, 0%, 29.8%)

LAB

lab(48.55, 15.09, -37.63)

LCH

lch(48.55, 40.54, 291.85)

OKLCH

oklch(56.2%, 0.1068, 277.37)

HWB

hwb(233.8, 40%, 29.8%)

Harmony colors

Complementary

#b3ab66

Analogous

#6694b3

#666eb3

#8566b3

Triadic

#666eb3

#b3666e

#6eb366

Split-complementary

#666eb3

#b38566

#94b366

Tetradic

#666eb3

#ab66b3

#b3ab66

#6eb366

Square

#666eb3

#b36694

#b3ab66

#66b385

Shades

Color #666eb3 mixed toward black.

#4e569c

#3e457d

#2f345e

#1f223f

#10111f

Tints

Color #666eb3 mixed toward white.

#8086c0

#999ecc

#b3b6d9

#cccfe6

#e6e7f2

Tones

Color #666eb3 mixed toward gray.

#6c73ad

#7378a6

#797da0

#808299

#868793

Accessibility

Aa White text on this color

4.72:1

Aa Black text on this color

4.45:1

White text reads better on this background (4.72:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6a6aa6 · ΔE 3.4

Deuteranopia

#6968a2 · ΔE 4.2

Tritanopia

#669a97 · ΔE 28.2

Achromatopsia

#737373 · ΔE 21.7

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

Code

CSS

background-color: #666eb3;

Tailwind (arbitrary value)

bg-[#666eb3]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#666eb3 (#666eb3) is rgb(102, 110, 179) in RGB.

No, #666eb3 is not web-safe. The nearest web-safe colors are among its tones and shades below.

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 #666eb3, or check how it holds up for accessibility.

Generate a palette → Check contrast