#181527

#181527

Color Values

HEX

#181527

RGB

24, 21, 39

HSL

250.0, 30.0%, 11.8%

HSV

250.0, 46.2%, 15.3%

CMYK

38.5%, 46.2%, 0.0%, 84.7%

OKLCH

0.2089 0.0353 290.7

Properties

Cool Dark Nearest: RAL 5003 Sapphire Blue

Color Harmonies

Complementary

#181527

#242715

Analogous

#151B27

#211527

#181527

Triadic

#181527

#271815

#152718

Split Complementary

#181527

#272115

#1B2715

Tetradic

#181527

#27151B

#242715

#152721

Color Blindness Simulation

Original

#181527

Protanopia

#171723

Deuteranopia

#171722

Tritanopia

#181F1E

Achromatopsia

#171717

CSS Usage

background-color: #181527;
color: #181527;
border-color: #181527;
Nearest Tailwind: Slate 900 #0F172A

Tailwind Shades

50
#F6F5F9
100
#EAE9F2
200
#D4D1E6
300
#B6AFD4
400
#8E84BD
500
#6659A6
600
#524785
700
#41396A
800
#332D53
900
#28233E
950
#191627

Contrast Checker

Text on white

17.87:1

AA Pass AAA Pass

Text on black

1.18:1

AA Fail AAA Fail

Related Articles

Tutorials

Building a Color Picker Web Component from Scratch

Feb 20, 2026
Tutorials

Web Color Performance: Gradients, Shadows, and Filters

Feb 19, 2026
Tutorials

Tailwind CSS Colors: Complete Shade System Guide

Feb 19, 2026