#646878

#646878

Color Values

HEX

#646878

RGB

100, 104, 120

HSL

228.0, 9.1%, 43.1%

HSV

228.0, 16.7%, 47.1%

CMYK

16.7%, 13.3%, 0.0%, 52.9%

OKLCH

0.5196 0.0257 274.4

Properties

Cool Dark Nearest: RAL 4012 Pearl Blackberry

Color Harmonies

Complementary

#646878

#787464

Analogous

#647278

#6A6478

#646878

Triadic

#646878

#786468

#687864

Split Complementary

#646878

#786A64

#727864

Tetradic

#646878

#786472

#787464

#64786A

Color Blindness Simulation

Original

#646878

Protanopia

#666674

Deuteranopia

#666573

Tritanopia

#647170

Achromatopsia

#686868

CSS Usage

background-color: #646878;
color: #646878;
border-color: #646878;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#ECECEF
200
#D8D9DF
300
#BCBEC7
400
#989BA9
500
#74798B
600
#5D606F
700
#4A4D59
800
#3A3C46
900
#2C2E34
950
#1C1D21

Contrast Checker

Text on white

5.54:1

AA Pass AAA Fail

Text on black

3.79:1

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