#0B172B

#0B172B

Color Values

HEX

#0B172B

RGB

11, 23, 43

HSL

217.5, 59.3%, 10.6%

HSV

217.5, 74.4%, 16.9%

CMYK

74.4%, 46.5%, 0.0%, 83.1%

OKLCH

0.2055 0.0437 260.1

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#0B172B

#2B1F0B

Analogous

#0B272B

#0F0B2B

#0B172B

Triadic

#0B172B

#2B0B17

#172B0B

Split Complementary

#0B172B

#2B0F0B

#272B0B

Tetradic

#0B172B

#2B0B27

#2B1F0B

#0B2B0F

Color Blindness Simulation

Original

#0B172B

Protanopia

#101026

Deuteranopia

#100F25

Tritanopia

#0C2222

Achromatopsia

#161616

CSS Usage

background-color: #0B172B;
color: #0B172B;
border-color: #0B172B;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F3F6FB
100
#E4EBF6
200
#C6D6F0
300
#9EB9E6
400
#6993D9
500
#346DCB
600
#2A57A2
700
#214682
800
#1A3666
900
#172A4A
950
#0E1B2F

Contrast Checker

Text on white

17.92:1

AA Pass AAA Pass

Text on black

1.17:1

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