#666D5D

#666D5D

Color Values

HEX

#666D5D

RGB

102, 109, 93

HSL

86.2, 7.9%, 39.6%

HSV

86.2, 14.7%, 42.7%

CMYK

6.4%, 0.0%, 14.7%, 57.3%

OKLCH

0.5239 0.0259 126.6

Properties

Cool Dark Nearest: RAL 7023 Concrete Grey

Color Harmonies

Complementary

#666D5D

#645D6D

Analogous

#6D6C5D

#5E6D5D

#666D5D

Triadic

#666D5D

#5D666D

#6D5D66

Split Complementary

#666D5D

#5D5E6D

#6C5D6D

Tetradic

#666D5D

#5D6D6C

#645D6D

#6D5D5E

Color Blindness Simulation

Original

#666D5D

Protanopia

#696961

Deuteranopia

#696862

Tritanopia

#666465

Achromatopsia

#6A6A6A

CSS Usage

background-color: #666D5D;
color: #666D5D;
border-color: #666D5D;
Nearest Tailwind: Stone 500 #78716C

Tailwind Shades

50
#F7F8F7
100
#EDEEEC
200
#DCDED8
300
#C2C7BD
400
#A2A899
500
#818A75
600
#676E5E
700
#52584B
800
#40453B
900
#31342D
950
#1F211C

Contrast Checker

Text on white

5.37:1

AA Pass AAA Fail

Text on black

3.91:1

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