#21666C

#21666C

Color Values

HEX

#21666C

RGB

33, 102, 108

HSL

184.8, 53.2%, 27.6%

HSV

184.8, 69.4%, 42.4%

CMYK

69.4%, 5.6%, 0.0%, 57.6%

OKLCH

0.4705 0.0677 203.4

Properties

Cool Dark Nearest: RAL 5021 Water Blue

Color Harmonies

Complementary

#21666C

#6C2721

Analogous

#216C4C

#21406C

#21666C

Triadic

#21666C

#6C2166

#666C21

Split Complementary

#21666C

#6C2140

#6C4C21

Tetradic

#21666C

#4C216C

#6C2721

#406C21

Color Blindness Simulation

Original

#21666C

Protanopia

#3F3F6B

Deuteranopia

#3B366A

Tritanopia

#246969

Achromatopsia

#585858

CSS Usage

background-color: #21666C;
color: #21666C;
border-color: #21666C;
Nearest Tailwind: Teal 800 #115E59

Tailwind Shades

50
#F4FAFB
100
#E5F4F5
200
#C8EBEE
300
#A1DDE2
400
#6ECBD3
500
#3CB8C3
600
#30949C
700
#26767D
800
#1E5C62
900
#194448
950
#102B2D

Contrast Checker

Text on white

6.6:1

AA Pass AAA Fail

Text on black

3.18:1

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