#181531

#181531

Color Values

HEX

#181531

RGB

24, 21, 49

HSL

246.4, 40.0%, 13.7%

HSV

246.4, 57.1%, 19.2%

CMYK

51.0%, 57.1%, 0.0%, 80.8%

OKLCH

0.2161 0.0536 285.9

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#181531

#2E3115

Analogous

#152031

#261531

#181531

Triadic

#181531

#311815

#153118

Split Complementary

#181531

#312615

#203115

Tetradic

#181531

#311520

#2E3115

#153126

Color Blindness Simulation

Original

#181531

Protanopia

#17172A

Deuteranopia

#171729

Tritanopia

#182524

Achromatopsia

#181818

CSS Usage

background-color: #181531;
color: #181531;
border-color: #181531;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F5FA
100
#E8E7F3
200
#D0CDEA
300
#AFA9DA
400
#837BC6
500
#574CB2
600
#463D8F
700
#383172
800
#2C2659
900
#231F42
950
#16142A

Contrast Checker

Text on white

17.64:1

AA Pass AAA Pass

Text on black

1.19:1

AA Fail AAA Fail

Related Articles

Color Questions

What Is Pantone? The Universal Color Language

Feb 20, 2026
Color Questions

What Is Metamerism? Why Colors Look Different Under Different Lights

Feb 20, 2026
Color Questions

What Is Luminance? Brightness in Color Science

Feb 20, 2026