#666fdf

Color #666fdf

A moderately saturated light blue.

Closest named color Royal Blue #4169e1 · ΔE 7.85 Nearest Tailwind class indigo-500 #615fff · ΔE 6

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

Conversions

HEX

#666fdf

RGB

rgb(102, 111, 223)

HSL

hsl(235.5, 65.4%, 63.7%)

HSV / HSB

hsv(235.5, 54.3%, 87.5%)

CMYK

cmyk(54.3%, 50.2%, 0%, 12.5%)

LAB

lab(51.29, 28.08, -58.45)

LCH

lch(51.29, 64.85, 295.66)

OKLCH

oklch(59.1%, 0.168, 276.49)

HWB

hwb(235.5, 40%, 12.5%)

Harmony colors

Complementary

#dfd666

Analogous

#66acdf

#666fdf

#9966df

Triadic

#666fdf

#df666f

#6fdf66

Split-complementary

#666fdf

#df9966

#acdf66

Tetradic

#666fdf

#d666df

#dfd666

#6fdf66

Square

#666fdf

#df66ac

#dfd666

#66df99

Shades

Color #666fdf mixed toward black.

#3945d6

#2530b3

#1c2486

#13185a

#090c2d

Tints

Color #666fdf mixed toward white.

#7f87e4

#999fea

#b2b7ef

#cccff4

#e5e7fa

Tones

Color #666fdf mixed toward gray.

#7078d5

#7a80cb

#8489c1

#8e91b7

#989aad

Accessibility

Aa White text on this color

4.28:1

Aa Black text on this color

4.9:1

Black text reads better on this background (4.9:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6a6acb · ΔE 3.6

Deuteranopia

#6969c6 · ΔE 4.3

Tritanopia

#66b9b5 · ΔE 35.9

Achromatopsia

#7a7a7a · ΔE 26.4

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

Code

CSS

background-color: #666fdf;

Tailwind (arbitrary value)

bg-[#666fdf]

Related colors

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Dark Blue #00008b

Ghost White #f8f8ff

Medium Blue #0000cd

Frequently asked questions

#666fdf (#666fdf) is rgb(102, 111, 223) in RGB.

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

Generate a palette → Check contrast