#281C45

#281C45

Color Values

HEX

#281C45

RGB

40, 28, 69

HSL

257.6, 42.3%, 19.0%

HSV

257.6, 59.4%, 27.1%

CMYK

42.0%, 59.4%, 0.0%, 72.9%

OKLCH

0.2648 0.0742 294.3

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#281C45

#39451C

Analogous

#1C2445

#3C1C45

#281C45

Triadic

#281C45

#45281C

#1C4528

Split Complementary

#281C45

#453C1C

#24451C

Tetradic

#281C45

#451C24

#39451C

#1C453C

Color Blindness Simulation

Original

#281C45

Protanopia

#23233B

Deuteranopia

#242439

Tritanopia

#273332

Achromatopsia

#222222

CSS Usage

background-color: #281C45;
color: #281C45;
border-color: #281C45;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F6F5FA
100
#EAE7F4
200
#D5CCEA
300
#B7A8DC
400
#9079C9
500
#694AB5
600
#543B91
700
#432F74
800
#35255B
900
#291E43
950
#1A132A

Contrast Checker

Text on white

15.65:1

AA Pass AAA Pass

Text on black

1.34:1

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