#15152F

#15152F

Color Values

HEX

#15152F

RGB

21, 21, 47

HSL

240.0, 38.2%, 13.3%

HSV

240.0, 55.3%, 18.4%

CMYK

55.3%, 55.3%, 0.0%, 81.6%

OKLCH

0.2115 0.0504 281.2

Properties

Cool Dark Nearest: RAL 5013 Cobalt Blue

Color Harmonies

Complementary

#15152F

#2F2F15

Analogous

#15222F

#22152F

#15152F

Triadic

#15152F

#2F1515

#152F15

Split Complementary

#15152F

#2F2215

#222F15

Tetradic

#15152F

#2F1522

#2F2F15

#152F22

Color Blindness Simulation

Original

#15152F

Protanopia

#151529

Deuteranopia

#151527

Tritanopia

#152423

Achromatopsia

#171717

CSS Usage

background-color: #15152F;
color: #15152F;
border-color: #15152F;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F5F5FA
100
#E7E7F3
200
#CECEE9
300
#AAAAD9
400
#7D7DC5
500
#4F4FB0
600
#3F3F8D
700
#323271
800
#272758
900
#202041
950
#141429

Contrast Checker

Text on white

17.79:1

AA Pass AAA Pass

Text on black

1.18:1

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