#666fbf

Color #666fbf

A moderately saturated medium blue.

Closest named color Cornflower Blue #6495ed · ΔE 16.45 Nearest Tailwind class slate-500 #62748e · ΔE 8.3

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

Conversions

HEX

#666fbf

RGB

rgb(102, 111, 191)

HSL

hsl(233.9, 41%, 57.5%)

HSV / HSB

hsv(233.9, 46.6%, 74.9%)

CMYK

cmyk(46.6%, 41.9%, 0%, 25.1%)

LAB

lab(49.44, 18.1, -43.16)

LCH

lch(49.44, 46.8, 292.75)

OKLCH

oklch(57.1%, 0.123, 276.91)

HWB

hwb(233.9, 40%, 25.1%)

Harmony colors

Complementary

#bfb666

Analogous

#669cbf

#666fbf

#8a66bf

Triadic

#666fbf

#bf666f

#6fbf66

Split-complementary

#666fbf

#bf8a66

#9cbf66

Tetradic

#666fbf

#b666bf

#bfb666

#6fbf66

Square

#666fbf

#bf669c

#bfb666

#66bf8a

Shades

Color #666fbf mixed toward black.

#4852ac

#3a428a

#2b3167

#1d2145

#0e1022

Tints

Color #666fbf mixed toward white.

#8087ca

#999fd4

#b3b7df

#cccfea

#e6e7f4

Tones

Color #666fbf mixed toward gray.

#6e75b8

#757bb0

#7c81a9

#8487a1

#8b8d9a

Accessibility

Aa White text on this color

4.57:1

Aa Black text on this color

4.59:1

Black text reads better on this background (4.59:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6a6ab0 · ΔE 3.6

Deuteranopia

#6969ac · ΔE 4.2

Tritanopia

#66a39f · ΔE 30.6

Achromatopsia

#767676 · ΔE 23.1

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

Code

CSS

background-color: #666fbf;

Tailwind (arbitrary value)

bg-[#666fbf]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#666fbf (#666fbf) is rgb(102, 111, 191) in RGB.

No, #666fbf 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.

Try it → Accessibility

Contrast Checker

Check the WCAG contrast ratio between any two colors, live, with AA/AAA pass-fail results.

Try it → Generators

Palette Generator

Generate complementary, analogous, triadic, split-complementary, tetradic, square, and monochromatic palettes from any base color.

Try it →

Build something with this color

Generate a full palette from #666fbf, or check how it holds up for accessibility.

Generate a palette → Check contrast