#1F213D

#1F213D

Color Values

HEX

#1F213D

RGB

31, 33, 61

HSL

236.0, 32.6%, 18.0%

HSV

236.0, 49.2%, 23.9%

CMYK

49.2%, 45.9%, 0.0%, 76.1%

OKLCH

0.2609 0.0522 279.0

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#1F213D

#3D3B1F

Analogous

#1F303D

#2C1F3D

#1F213D

Triadic

#1F213D

#3D1F21

#213D1F

Split Complementary

#1F213D

#3D2C1F

#303D1F

Tetradic

#1F213D

#3D1F30

#3D3B1F

#1F3D2C

Color Blindness Simulation

Original

#1F213D

Protanopia

#202036

Deuteranopia

#202035

Tritanopia

#1F3130

Achromatopsia

#232323

CSS Usage

background-color: #1F213D;
color: #1F213D;
border-color: #1F213D;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F6F9
100
#E8E9F2
200
#D0D1E7
300
#AEB1D6
400
#8286BF
500
#565BA9
600
#454987
700
#373B6C
800
#2B2E55
900
#22243F
950
#161728

Contrast Checker

Text on white

15.63:1

AA Pass AAA Pass

Text on black

1.34:1

AA Fail AAA Fail

Related Articles

Brand Stories

Pantone Colors by Decade: The 2000s, 2010s, and 2020s Compared

Feb 01, 2026
Tutorials

Responsive Color: Adapting Colors for Different Screens

Jan 23, 2026
Tutorials

Color for Data Storytelling: Beyond Default Chart Colors

Jan 21, 2026