#1F2943

#1F2943

Color Values

HEX

#1F2943

RGB

31, 41, 67

HSL

223.3, 36.7%, 19.2%

HSV

223.3, 53.7%, 26.3%

CMYK

53.7%, 38.8%, 0.0%, 73.7%

OKLCH

0.2851 0.05 267.2

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#1F2943

#43391F

Analogous

#1F3B43

#271F43

#1F2943

Triadic

#1F2943

#431F29

#29431F

Split Complementary

#1F2943

#43271F

#3B431F

Tetradic

#1F2943

#431F3B

#43391F

#1F4327

Color Blindness Simulation

Original

#1F2943

Protanopia

#23233D

Deuteranopia

#23223B

Tritanopia

#203837

Achromatopsia

#292929

CSS Usage

background-color: #1F2943;
color: #1F2943;
border-color: #1F2943;
Nearest Tailwind: Slate 800 #1E293B

Tailwind Shades

50
#F5F6FA
100
#E8EBF3
200
#CED5E8
300
#ABB8D8
400
#7E91C3
500
#516BAE
600
#41558B
700
#344470
800
#283557
900
#202940
950
#141A29

Contrast Checker

Text on white

14.42:1

AA Pass AAA Pass

Text on black

1.46:1

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