#213B4F

#213B4F

Color Values

HEX

#213B4F

RGB

33, 59, 79

HSL

206.1, 41.1%, 22.0%

HSV

206.1, 58.2%, 31.0%

CMYK

58.2%, 25.3%, 0.0%, 69.0%

OKLCH

0.3409 0.0477 243.0

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#213B4F

#4F3521

Analogous

#214F4C

#21244F

#213B4F

Triadic

#213B4F

#4F213B

#3B4F21

Split Complementary

#213B4F

#4F2124

#4F4C21

Tetradic

#213B4F

#4C214F

#4F3521

#244F21

Color Blindness Simulation

Original

#213B4F

Protanopia

#2C2C4A

Deuteranopia

#2B2949

Tritanopia

#224646

Achromatopsia

#373737

CSS Usage

background-color: #213B4F;
color: #213B4F;
border-color: #213B4F;
Nearest Tailwind: Slate 700 #334155

Tailwind Shades

50
#F5F8FA
100
#E7EEF3
200
#CDDDEA
300
#A9C5DB
400
#7AA6C7
500
#4B86B4
600
#3C6B90
700
#305673
800
#26435A
900
#1F3342
950
#13202A

Contrast Checker

Text on white

11.65:1

AA Pass AAA Pass

Text on black

1.8:1

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