#665bb3

Color #665bb3

A muted medium blue.

Closest named color Dark Slate Blue #483d8b · ΔE 13.24 Nearest Tailwind class indigo-500 #615fff · ΔE 10.8

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

Conversions

HEX

#665bb3

RGB

rgb(102, 91, 179)

HSL

hsl(247.5, 36.7%, 52.9%)

HSV / HSB

hsv(247.5, 49.2%, 70.2%)

CMYK

cmyk(43%, 49.2%, 0%, 29.8%)

LAB

lab(43.6, 26.78, -45.49)

LCH

lch(43.6, 52.79, 300.49)

OKLCH

oklch(52.4%, 0.1345, 286.5)

HWB

hwb(247.5, 35.7%, 29.8%)

Harmony colors

Complementary

#a8b35b

Analogous

#5b7cb3

#665bb3

#925bb3

Triadic

#665bb3

#b3665b

#5bb366

Split-complementary

#665bb3

#b3925b

#7cb35b

Tetradic

#665bb3

#b35ba8

#a8b35b

#5bb366

Square

#665bb3

#b35b7c

#a8b35b

#5bb392

Shades

Color #665bb3 mixed toward black.

#51479a

#41397b

#312b5c

#211c3d

#100e1f

Tints

Color #665bb3 mixed toward white.

#7f76c0

#9992cc

#b2add9

#ccc8e6

#e5e4f2

Tones

Color #665bb3 mixed toward gray.

#6b62ac

#716aa4

#76719d

#7c7896

#81808e

Accessibility

Aa White text on this color

5.66:1

Aa Black text on this color

3.71:1

White text reads better on this background (5.66:1). That passes WCAG AA (≥4.5:1) for normal-size text, but not AAA.

Under color vision deficiencies

Protanopia

#6161a3 · ΔE 4.1

Deuteranopia

#62639f · ΔE 5.2

Tritanopia

#659592 · ΔE 31.5

Achromatopsia

#676767 · ΔE 24.5

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

Code

CSS

background-color: #665bb3;

Tailwind (arbitrary value)

bg-[#665bb3]

Related colors

Slate Blue #6a5acd

Dark Slate Blue #483d8b

Medium Slate Blue #7b68ee

Navy #000080

Lavender #e6e6fa

Blue #0000ff

Frequently asked questions

#665bb3 (#665bb3) is rgb(102, 91, 179) in RGB.

No, #665bb3 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 #665bb3, or check how it holds up for accessibility.

Generate a palette → Check contrast