#1B3043

#1B3043

Color Values

HEX

#1B3043

RGB

27, 48, 67

HSL

208.5, 42.6%, 18.4%

HSV

208.5, 59.7%, 26.3%

CMYK

59.7%, 28.4%, 0.0%, 73.7%

OKLCH

0.301 0.0439 247.1

Properties

Cool Dark Nearest: RAL 5020 Ocean Blue

Color Harmonies

Complementary

#1B3043

#432E1B

Analogous

#1B4342

#1B1C43

#1B3043

Triadic

#1B3043

#431B30

#30431B

Split Complementary

#1B3043

#431B1C

#43421B

Tetradic

#1B3043

#421B43

#432E1B

#1C431B

Color Blindness Simulation

Original

#1B3043

Protanopia

#24243E

Deuteranopia

#23213D

Tritanopia

#1C3B3A

Achromatopsia

#2D2D2D

CSS Usage

background-color: #1B3043;
color: #1B3043;
border-color: #1B3043;
Nearest Tailwind: Slate 800 #1E293B

Tailwind Shades

50
#F5F7FA
100
#E7EDF4
200
#CCDCEB
300
#A8C3DC
400
#78A3C9
500
#4982B6
600
#3B6891
700
#2F5374
800
#25415B
900
#1E3143
950
#131F2A

Contrast Checker

Text on white

13.54:1

AA Pass AAA Pass

Text on black

1.55:1

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