#066371

#066371

Color Values

HEX

#066371

RGB

6, 99, 113

HSL

187.9, 89.9%, 23.3%

HSV

187.9, 94.7%, 44.3%

CMYK

94.7%, 12.4%, 0.0%, 55.7%

OKLCH

0.4592 0.0783 211.8

Properties

Cool Dark Nearest: RAL 5021 Water Blue

Color Harmonies

Complementary

#066371

#711406

Analogous

#067149

#062D71

#066371

Triadic

#066371

#710663

#637106

Split Complementary

#066371

#71062D

#714906

Tetradic

#066371

#490671

#711406

#2D7106

Color Blindness Simulation

Original

#066371

Protanopia

#2E2F6E

Deuteranopia

#29226D

Tritanopia

#0B6B6A

Achromatopsia

#505050

CSS Usage

background-color: #066371;
color: #066371;
border-color: #066371;
Nearest Tailwind: Cyan 800 #155E75

Tailwind Shades

50
#F2FCFD
100
#E0F7FB
200
#BBF3FB
300
#8BEAF9
400
#4CDFF5
500
#0DD4F2
600
#0AAAC2
700
#08889B
800
#066A79
900
#094D58
950
#063137

Contrast Checker

Text on white

6.93:1

AA Pass AAA Fail

Text on black

3.03:1

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