#0B1F3C

#0B1F3C

Color Values

HEX

#0B1F3C

RGB

11, 31, 60

HSL

215.5, 69.0%, 13.9%

HSV

215.5, 81.7%, 23.5%

CMYK

81.7%, 48.3%, 0.0%, 76.5%

OKLCH

0.2408 0.0614 257.9

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#0B1F3C

#3C280B

Analogous

#0B373C

#0F0B3C

#0B1F3C

Triadic

#0B1F3C

#3C0B1F

#1F3C0B

Split Complementary

#0B1F3C

#3C0F0B

#373C0B

Tetradic

#0B1F3C

#3C0B37

#3C280B

#0B3C0F

Color Blindness Simulation

Original

#0B1F3C

Protanopia

#141435

Deuteranopia

#121133

Tritanopia

#0C2F2E

Achromatopsia

#1D1D1D

CSS Usage

background-color: #0B1F3C;
color: #0B1F3C;
border-color: #0B1F3C;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F3F7FC
100
#E3EBF8
200
#C3D7F4
300
#98BAEC
400
#6095E2
500
#286FD7
600
#2059AC
700
#19478A
800
#14386C
900
#122B4F
950
#0C1B32

Contrast Checker

Text on white

16.46:1

AA Pass AAA Pass

Text on black

1.28:1

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