#40575B

#40575B

Color Values

HEX

#40575B

RGB

64, 87, 91

HSL

188.9, 17.4%, 30.4%

HSV

188.9, 29.7%, 35.7%

CMYK

29.7%, 4.4%, 0.0%, 64.3%

OKLCH

0.4395 0.0287 209.4

Properties

Cool Dark Nearest: darkslategrey

Color Harmonies

Complementary

#40575B

#5B4440

Analogous

#405B52

#404A5B

#40575B

Triadic

#40575B

#5B4057

#575B40

Split Complementary

#40575B

#5B404A

#5B5240

Tetradic

#40575B

#52405B

#5B4440

#4A5B40

Color Blindness Simulation

Original

#40575B

Protanopia

#4A4A5A

Deuteranopia

#49475A

Tritanopia

#415959

Achromatopsia

#525252

CSS Usage

background-color: #40575B;
color: #40575B;
border-color: #40575B;
Nearest Tailwind: Gray 600 #4B5563

Tailwind Shades

50
#F6F8F8
100
#EBEFF0
200
#D5E0E2
300
#B7C9CC
400
#90ACB1
500
#698F96
600
#547278
700
#435C60
800
#35484B
900
#293638
950
#1A2223

Contrast Checker

Text on white

7.69:1

AA Pass AAA Pass

Text on black

2.73:1

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