#1D21BC

#1D21BC

Color Values

HEX

#1D21BC

RGB

29, 33, 188

HSL

238.5, 73.3%, 42.5%

HSV

238.5, 84.6%, 73.7%

CMYK

84.6%, 82.4%, 0.0%, 26.3%

OKLCH

0.3909 0.2278 268.5

Properties

Cool Dark Nearest: darkblue

Color Harmonies

Complementary

#1D21BC

#BCB81D

Analogous

#1D70BC

#681DBC

#1D21BC

Triadic

#1D21BC

#BC1D21

#21BC1D

Split Complementary

#1D21BC

#BC681D

#70BC1D

Tetradic

#1D21BC

#BC1D70

#BCB81D

#1DBC68

Color Blindness Simulation

Original

#1D21BC

Protanopia

#1F1F97

Deuteranopia

#1E1E8E

Tritanopia

#1D7972

Achromatopsia

#2B2B2B

CSS Usage

background-color: #1D21BC;
color: #1D21BC;
border-color: #1D21BC;
Nearest Tailwind: Indigo 700 #4338CA

Tailwind Shades

50
#F3F3FC
100
#E2E3F8
200
#C1C2F5
300
#9597EF
400
#5B5FE6
500
#2227DD
600
#1B1FB1
700
#16198D
800
#11136E
900
#101250
950
#0A0B33

Contrast Checker

Text on white

10.52:1

AA Pass AAA Pass

Text on black

2.0:1

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