#1D213F

#1D213F

Color Values

HEX

#1D213F

RGB

29, 33, 63

HSL

232.9, 37.0%, 18.0%

HSV

232.9, 54.0%, 24.7%

CMYK

54.0%, 47.6%, 0.0%, 75.3%

OKLCH

0.2605 0.0563 276.0

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#1D213F

#3F3B1D

Analogous

#1D323F

#2A1D3F

#1D213F

Triadic

#1D213F

#3F1D21

#213F1D

Split Complementary

#1D213F

#3F2A1D

#323F1D

Tetradic

#1D213F

#3F1D32

#3F3B1D

#1D3F2A

Color Blindness Simulation

Original

#1D213F

Protanopia

#1F1F38

Deuteranopia

#1E1E36

Tritanopia

#1D3231

Achromatopsia

#222222

CSS Usage

background-color: #1D213F;
color: #1D213F;
border-color: #1D213F;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F6FA
100
#E8E9F3
200
#CED1E9
300
#ABB1D8
400
#7E86C4
500
#505BAF
600
#40498C
700
#333B70
800
#282E57
900
#202441
950
#141729

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

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