#645DBE

#645DBE

Color Values

HEX

#645DBE

RGB

100, 93, 190

HSL

244.3, 42.7%, 55.5%

HSV

244.3, 51.1%, 74.5%

CMYK

47.4%, 51.1%, 0.0%, 25.5%

OKLCH

0.5337 0.1473 283.5

Properties

Cool Dark Nearest: NCS S 1050-R90B Blue Violet

Color Harmonies

Complementary

#645DBE

#B7BE5D

Analogous

#5D87BE

#945DBE

#645DBE

Triadic

#645DBE

#BE645D

#5DBE64

Split Complementary

#645DBE

#BE945D

#87BE5D

Tetradic

#645DBE

#BE5D87

#B7BE5D

#5DBE94

Color Blindness Simulation

Original

#645DBE

Protanopia

#6161A7

Deuteranopia

#6162A1

Tritanopia

#649490

Achromatopsia

#656565

CSS Usage

background-color: #645DBE;
color: #645DBE;
border-color: #645DBE;
Nearest Tailwind: Blue 800 #1E40AF

Tailwind Shades

50
#F5F5FA
100
#E8E7F4
200
#CECCEB
300
#ABA8DC
400
#7E78C9
500
#5149B6
600
#413A92
700
#342F74
800
#28255B
900
#201E43
950
#15132A

Contrast Checker

Text on white

5.45:1

AA Pass AAA Fail

Text on black

3.85:1

AA Fail 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