#666eab

Color #666eab

A muted medium blue.

Closest named color Steel Blue #4682b4 · ΔE 17.42 Nearest Tailwind class slate-500 #62748e · ΔE 7.5

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Conversions

HEX

#666eab

RGB

rgb(102, 110, 171)

HSL

hsl(233, 29.1%, 53.5%)

HSV / HSB

hsv(233, 40.4%, 67.1%)

CMYK

cmyk(40.4%, 35.7%, 0%, 32.9%)

LAB

lab(48.15, 12.74, -33.6)

LCH

lch(48.15, 35.93, 290.77)

OKLCH

oklch(55.8%, 0.0949, 277.14)

HWB

hwb(233, 40%, 32.9%)

Harmony colors

Complementary

#aba366

Analogous

#6690ab

#666eab

#8066ab

Triadic

#666eab

#ab666e

#6eab66

Split-complementary

#666eab

#ab8066

#90ab66

Tetradic

#666eab

#a366ab

#aba366

#6eab66

Square

#666eab

#ab6690

#aba366

#66ab80

Shades

Color #666eab mixed toward black.

#515893

#404775

#303558

#20233b

#10121d

Tints

Color #666eab mixed toward white.

#7f86b9

#999ec7

#b2b6d5

#cccfe3

#e5e7f1

Tones

Color #666eab mixed toward gray.

#6c72a5

#71779f

#777b9a

#7d8094

#83848e

Accessibility

Aa White text on this color

4.79:1

Aa Black text on this color

4.38:1

White text reads better on this background (4.79:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6a6a9f · ΔE 3.4

Deuteranopia

#69689c · ΔE 4.1

Tritanopia

#669592 · ΔE 26.9

Achromatopsia

#727272 · ΔE 20.4

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

Code

CSS

background-color: #666eab;

Tailwind (arbitrary value)

bg-[#666eab]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#666eab (#666eab) is rgb(102, 110, 171) in RGB.

No, #666eab 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 #666eab, or check how it holds up for accessibility.

Generate a palette → Check contrast