#281D3C

#281D3C

Color Values

HEX

#281D3C

RGB

40, 29, 60

HSL

261.3, 34.8%, 17.5%

HSV

261.3, 51.7%, 23.5%

CMYK

33.3%, 51.7%, 0.0%, 76.5%

OKLCH

0.2604 0.0578 298.7

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#281D3C

#313C1D

Analogous

#1D223C

#381D3C

#281D3C

Triadic

#281D3C

#3C281D

#1D3C28

Split Complementary

#281D3C

#3C381D

#223C1D

Tetradic

#281D3C

#3C1D22

#313C1D

#1D3C38

Color Blindness Simulation

Original

#281D3C

Protanopia

#232335

Deuteranopia

#242533

Tritanopia

#272F2D

Achromatopsia

#222222

CSS Usage

background-color: #281D3C;
color: #281D3C;
border-color: #281D3C;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F7F5FA
100
#ECE8F2
200
#D8CFE8
300
#BCADD7
400
#9780C1
500
#7353AC
600
#5C4389
700
#49356E
800
#392A56
900
#2C2140
950
#1C1528

Contrast Checker

Text on white

15.78:1

AA Pass AAA Pass

Text on black

1.33:1

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