#0A172C

#0A172C

Color Values

HEX

#0A172C

RGB

10, 23, 44

HSL

217.1, 63.0%, 10.6%

HSV

217.1, 77.3%, 17.3%

CMYK

77.3%, 47.7%, 0.0%, 82.7%

OKLCH

0.2056 0.0459 259.6

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#0A172C

#2C1F0A

Analogous

#0A282C

#0E0A2C

#0A172C

Triadic

#0A172C

#2C0A17

#172C0A

Split Complementary

#0A172C

#2C0E0A

#282C0A

Tetradic

#0A172C

#2C0A28

#2C1F0A

#0A2C0E

Color Blindness Simulation

Original

#0A172C

Protanopia

#101027

Deuteranopia

#0F0E26

Tritanopia

#0B2322

Achromatopsia

#161616

CSS Usage

background-color: #0A172C;
color: #0A172C;
border-color: #0A172C;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F3F6FB
100
#E4EBF7
200
#C5D6F2
300
#9BB9E8
400
#6593DC
500
#2F6CD0
600
#2657A6
700
#1E4585
800
#183668
900
#152A4C
950
#0D1A30

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