#646F78

#646F78

Color Values

HEX

#646F78

RGB

100, 111, 120

HSL

207.0, 9.1%, 43.1%

HSV

207.0, 16.7%, 47.1%

CMYK

16.7%, 7.5%, 0.0%, 52.9%

OKLCH

0.5356 0.0194 242.7

Properties

Cool Dark Nearest: lightsteelblue 4

Color Harmonies

Complementary

#646F78

#786D64

Analogous

#647877

#646578

#646F78

Triadic

#646F78

#78646F

#6F7864

Split Complementary

#646F78

#786465

#787764

Tetradic

#646F78

#776478

#786D64

#657864

Color Blindness Simulation

Original

#646F78

Protanopia

#696976

Deuteranopia

#686775

Tritanopia

#657474

Achromatopsia

#6D6D6D

CSS Usage

background-color: #646F78;
color: #646F78;
border-color: #646F78;
Nearest Tailwind: Gray 500 #6B7280

Tailwind Shades

50
#F7F7F8
100
#ECEDEF
200
#D8DCDF
300
#BCC2C7
400
#98A2A9
500
#74818B
600
#5D676F
700
#4A5259
800
#3A4046
900
#2C3134
950
#1C1F21

Contrast Checker

Text on white

5.14:1

AA Pass AAA Fail

Text on black

4.09:1

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