#666bb4

Color #666bb4

A muted medium blue.

Closest named color Cornflower Blue #6495ed · ΔE 18.98 Nearest Tailwind class slate-500 #62748e · ΔE 8.1

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Conversions

HEX

#666bb4

RGB

rgb(102, 107, 180)

HSL

hsl(236.2, 34.2%, 55.3%)

HSV / HSB

hsv(236.2, 43.3%, 70.6%)

CMYK

cmyk(43.3%, 40.6%, 0%, 29.4%)

LAB

lab(47.8, 17.23, -39.4)

LCH

lch(47.8, 43, 293.62)

OKLCH

oklch(55.7%, 0.1125, 279.1)

HWB

hwb(236.2, 40%, 29.4%)

Harmony colors

Complementary

#b4af66

Analogous

#6692b4

#666bb4

#8866b4

Triadic

#666bb4

#b4666b

#6bb466

Split-complementary

#666bb4

#b48866

#92b466

Tetradic

#666bb4

#af66b4

#b4af66

#6bb466

Square

#666bb4

#b46692

#b4af66

#66b488

Shades

Color #666bb4 mixed toward black.

#4d529e

#3e427e

#2e315f

#1f213f

#0f1020

Tints

Color #666bb4 mixed toward white.

#8084c0

#999ccd

#b3b5d9

#cccee6

#e6e6f2

Tones

Color #666bb4 mixed toward gray.

#6d71ae

#7376a7

#7a7ca1

#80829a

#878794

Accessibility

Aa White text on this color

4.85:1

Aa Black text on this color

4.33:1

White text reads better on this background (4.85:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6868a6 · ΔE 3

Deuteranopia

#6868a2 · ΔE 3.8

Tritanopia

#669a97 · ΔE 29

Achromatopsia

#717171 · ΔE 22.3

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

Code

CSS

background-color: #666bb4;

Tailwind (arbitrary value)

bg-[#666bb4]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#666bb4 (#666bb4) is rgb(102, 107, 180) in RGB.

No, #666bb4 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 #666bb4, or check how it holds up for accessibility.

Generate a palette → Check contrast