#1F042F

#1F042F

Color Values

HEX

#1F042F

RGB

31, 4, 47

HSL

277.7, 84.3%, 10.0%

HSV

277.7, 91.5%, 18.4%

CMYK

34.0%, 91.5%, 0.0%, 81.6%

OKLCH

0.1908 0.0833 309.6

Properties

Cool Dark Nearest: RAL 5002 Ultramarine Blue

Color Harmonies

Complementary

#1F042F

#142F04

Analogous

#0A042F

#2F0429

#1F042F

Triadic

#1F042F

#2F1F04

#042F1F

Split Complementary

#1F042F

#292F04

#042F0A

Tetradic

#1F042F

#2F0A04

#142F04

#04292F

Color Blindness Simulation

Original

#1F042F

Protanopia

#131325

Deuteranopia

#151722

Tritanopia

#1E1C1B

Achromatopsia

#0D0D0D

CSS Usage

background-color: #1F042F;
color: #1F042F;
border-color: #1F042F;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F9F2FD
100
#F0E0FA
200
#E3BDF9
300
#CF8EF5
400
#B551F0
500
#9B14EB
600
#7C10BC
700
#630D96
800
#4E0A75
900
#3A0C55
950
#250736

Contrast Checker

Text on white

18.81:1

AA Pass AAA Pass

Text on black

1.12:1

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