#664F81

#664F81

Color Values

HEX

#664F81

RGB

102, 79, 129

HSL

267.6, 24.0%, 40.8%

HSV

267.6, 38.8%, 50.6%

CMYK

20.9%, 38.8%, 0.0%, 49.4%

OKLCH

0.4723 0.0828 304.6

Properties

Cool Dark Nearest: RAL 4005 Blue Lilac

Color Harmonies

Complementary

#664F81

#6A814F

Analogous

#4F5181

#7F4F81

#664F81

Triadic

#664F81

#81664F

#4F8166

Split Complementary

#664F81

#817F4F

#51814F

Tetradic

#664F81

#814F51

#6A814F

#4F817F

Color Blindness Simulation

Original

#664F81

Protanopia

#5C5C75

Deuteranopia

#5D5F72

Tritanopia

#656B69

Achromatopsia

#575757

CSS Usage

background-color: #664F81;
color: #664F81;
border-color: #664F81;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F7F6F9
100
#EDEAF1
200
#DBD3E4
300
#C1B3D0
400
#9F8AB7
500
#7D619E
600
#644E7E
700
#503E65
800
#3F304F
900
#30263B
950
#1E1825

Contrast Checker

Text on white

7.0:1

AA Pass AAA Fail

Text on black

3.0:1

AA Fail AAA Fail

Related Articles

Tutorials

CSS color-mix(): Blend Colors Natively in the Browser

Jan 26, 2026
Tutorials

Building a Color Picker Web Component from Scratch

Jan 21, 2026
Tutorials

Perceptual Color Spaces: Lab, LCH, Oklab, OKLCH

Jan 15, 2026