#665BCB

#665BCB

Color Values

HEX

#665BCB

RGB

102, 91, 203

HSL

245.9, 51.9%, 57.6%

HSV

245.9, 55.2%, 79.6%

CMYK

49.8%, 55.2%, 0.0%, 20.4%

OKLCH

0.5406 0.1676 283.7

Properties

Cool Dark Nearest: slateblue

Color Harmonies

Complementary

#665BCB

#C0CB5B

Analogous

#5B88CB

#9E5BCB

#665BCB

Triadic

#665BCB

#CB665B

#5BCB66

Split Complementary

#665BCB

#CB9E5B

#88CB5B

Tetradic

#665BCB

#CB5B88

#C0CB5B

#5BCB9E

Color Blindness Simulation

Original

#665BCB

Protanopia

#6161B0

Deuteranopia

#6263A9

Tritanopia

#659A96

Achromatopsia

#656565

CSS Usage

background-color: #665BCB;
color: #665BCB;
border-color: #665BCB;
Nearest Tailwind: Blue 800 #1E40AF

Tailwind Shades

50
#F5F4FB
100
#E7E5F5
200
#CCC9EE
300
#A8A2E2
400
#7970D2
500
#4A3DC2
600
#3B319B
700
#30277C
800
#251F61
900
#1E1A47
950
#13102D

Contrast Checker

Text on white

5.35:1

AA Pass AAA Fail

Text on black

3.92:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026