#1D183B

#1D183B

Color Values

HEX

#1D183B

RGB

29, 24, 59

HSL

248.6, 42.2%, 16.3%

HSV

248.6, 59.3%, 23.1%

CMYK

50.8%, 59.3%, 0.0%, 76.9%

OKLCH

0.2362 0.065 286.9

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#1D183B

#363B18

Analogous

#18253B

#2F183B

#1D183B

Triadic

#1D183B

#3B1D18

#183B1D

Split Complementary

#1D183B

#3B2F18

#253B18

Tetradic

#1D183B

#3B1825

#363B18

#183B2F

Color Blindness Simulation

Original

#1D183B

Protanopia

#1B1B33

Deuteranopia

#1B1B30

Tritanopia

#1D2C2A

Achromatopsia

#1C1C1C

CSS Usage

background-color: #1D183B;
color: #1D183B;
border-color: #1D183B;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F5F5FA
100
#E9E7F4
200
#D1CCEA
300
#AFA8DC
400
#8479C8
500
#594AB5
600
#473B91
700
#392F74
800
#2D255B
900
#231E43
950
#16132A

Contrast Checker

Text on white

16.85:1

AA Pass AAA Pass

Text on black

1.25:1

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