#1C183B

#1C183B

Color Values

HEX

#1C183B

RGB

28, 24, 59

HSL

246.9, 42.2%, 16.3%

HSV

246.9, 59.3%, 23.1%

CMYK

52.5%, 59.3%, 0.0%, 76.9%

OKLCH

0.2352 0.0651 285.4

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#1C183B

#373B18

Analogous

#18263B

#2E183B

#1C183B

Triadic

#1C183B

#3B1C18

#183B1C

Split Complementary

#1C183B

#3B2E18

#263B18

Tetradic

#1C183B

#3B1826

#373B18

#183B2E

Color Blindness Simulation

Original

#1C183B

Protanopia

#1A1A33

Deuteranopia

#1A1B30

Tritanopia

#1C2C2A

Achromatopsia

#1B1B1B

CSS Usage

background-color: #1C183B;
color: #1C183B;
border-color: #1C183B;
Nearest Tailwind: Indigo 950 #1E1B4B

Tailwind Shades

50
#F5F5FA
100
#E8E7F4
200
#D0CCEA
300
#AEA8DC
400
#8279C8
500
#564AB5
600
#453B91
700
#372F74
800
#2B255B
900
#221E43
950
#16132A

Contrast Checker

Text on white

16.89:1

AA Pass AAA Pass

Text on black

1.24:1

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