#6366EF

#6366EF

Color Values

HEX

#6366EF

RGB

99, 102, 239

HSL

238.7, 81.4%, 66.3%

HSV

238.7, 58.6%, 93.7%

CMYK

58.6%, 57.3%, 0.0%, 6.3%

OKLCH

0.5839 0.2015 277.2

Properties

Cool Light Nearest: slateblue 2

Color Harmonies

Complementary

#6366EF

#EFEC63

Analogous

#63ACEF

#A663EF

#6366EF

Triadic

#6366EF

#EF6366

#66EF63

Split Complementary

#6366EF

#EFA663

#ACEF63

Tetradic

#6366EF

#EF63AC

#EFEC63

#63EFA6

Color Blindness Simulation

Original

#6366EF

Protanopia

#6464CE

Deuteranopia

#6464C6

Tritanopia

#63B4AE

Achromatopsia

#6F6F6F

CSS Usage

background-color: #6366EF;
color: #6366EF;
border-color: #6366EF;
Nearest Tailwind: Indigo 500 #6366F1

Tailwind Shades

50
#F2F2FD
100
#E1E1FA
200
#BEBFF8
300
#9092F4
400
#5457ED
500
#181CE7
600
#1317B9
700
#0F1294
800
#0C0E74
900
#0D0E54
950
#080935

Contrast Checker

Text on white

4.49:1

AA Fail AAA Fail

Text on black

4.68:1

AA Pass 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