#646FBB

#646FBB

Color Values

HEX

#646FBB

RGB

100, 111, 187

HSL

232.4, 39.0%, 56.3%

HSV

232.4, 46.5%, 73.3%

CMYK

46.5%, 40.6%, 0.0%, 26.7%

OKLCH

0.5672 0.1176 275.8

Properties

Cool Dark Nearest: Indigo

Color Harmonies

Complementary

#646FBB

#BBB064

Analogous

#649BBB

#8564BB

#646FBB

Triadic

#646FBB

#BB646F

#6FBB64

Split Complementary

#646FBB

#BB8564

#9BBB64

Tetradic

#646FBB

#BB649B

#BBB064

#64BB85

Color Blindness Simulation

Original

#646FBB

Protanopia

#6969A9

Deuteranopia

#6867A4

Tritanopia

#659A97

Achromatopsia

#727272

CSS Usage

background-color: #646FBB;
color: #646FBB;
border-color: #646FBB;
Nearest Tailwind: Indigo 400 #818CF8

Tailwind Shades

50
#F5F5FA
100
#E7E9F3
200
#CDD1E9
300
#AAB0DA
400
#7C85C5
500
#4E5AB1
600
#3E488E
700
#323A71
800
#272D59
900
#1F2441
950
#141729

Contrast Checker

Text on white

4.63:1

AA Pass AAA Fail

Text on black

4.53:1

AA Pass AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026