#40637E

#40637E

Color Values

HEX

#40637E

RGB

64, 99, 126

HSL

206.1, 32.6%, 37.3%

HSV

206.1, 49.2%, 49.4%

CMYK

49.2%, 21.4%, 0.0%, 50.6%

OKLCH

0.4845 0.0595 242.6

Properties

Cool Dark Nearest: skyblue 4

Color Harmonies

Complementary

#40637E

#7E5B40

Analogous

#407E7A

#40447E

#40637E

Triadic

#40637E

#7E4063

#637E40

Split Complementary

#40637E

#7E4044

#7E7A40

Tetradic

#40637E

#7A407E

#7E5B40

#447E40

Color Blindness Simulation

Original

#40637E

Protanopia

#4F4F77

Deuteranopia

#4D4A76

Tritanopia

#427271

Achromatopsia

#5E5E5E

CSS Usage

background-color: #40637E;
color: #40637E;
border-color: #40637E;
Nearest Tailwind: Slate 600 #475569

Tailwind Shades

50
#F5F8F9
100
#E8EEF2
200
#D0DDE7
300
#AEC4D6
400
#82A5BF
500
#5685A9
600
#456A87
700
#37556C
800
#2B4255
900
#22323F
950
#162028

Contrast Checker

Text on white

6.36:1

AA Pass AAA Fail

Text on black

3.3:1

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