#6388EE#6388EE

#6388EE is a light, vivid blue. Relative luminance 0.264; OKLCH L 64.8% C 0.158 H 267.0°. Best body text is #000000 at 6.29:1 contrast (WCAG AA passes).

Color values

HEX	#6388EE
RGB	rgb(99, 136, 238)
HSL	hsl(224, 80%, 66%)
HSV	hsv(224, 58%, 93%)
CMYK	cmyk(58.4%, 42.9%, 0%, 6.7%)
CIE-LAB	lab(58.44, 17.18, -55.39)
CIE-LCH	lch(58.44, 57.99, 287.23°)
OKLab	oklab(64.78% -0.0084 -0.1577)
OKLCH	oklch(64.78% 0.158 267)
XYZ	xyz(29.3771, 26.4316, 84.4261)
Luminance	0.2643 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6388EE #EEC963

analogous

#63CDEE #6388EE #8363EE

triadic

#6388EE #EE6388 #88EE63

tetradic

#6388EE #EE63CD #EEC963 #63EE83

square

#6388EE #EE63CD #EEC963 #63EE83

split-complementary

#6388EE #EE8363 #CDEE63

monochromatic

#1543C2 #2C5EE8 #6388EE #9AB2F4 #D1DCFA

Accessibility & contrast

On white

3.34

#6388EE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.29

#6388EE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6388EE

6.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6388EE	#FFFFFF	#000000	##000000
##6388EE	1.00	3.34	6.29	6.29
#FFFFFF	3.34	1.00	21.00	21.00
#000000	6.29	21.00	1.00	1.00
##000000	6.29	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A93F2

Deuteranopia (green-blind)

#4787EC

Tritanopia (blue-blind)

#009FAF

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #6388ee;
/* rgb */ color: rgb(99, 136, 238);
/* oklch */ color: oklch(64.8% 0.158 267.0);

Tailwind

colors: {
  custom: {
    50: '#9aaaf4',
    500: '#6388ee',
    950: '#000000',
  },
}

SCSS

$custom: #6388ee;
$custom-light: #9aaaf4;
$custom-dark: #000000;

JSON

{
  "hex": "#6388ee",
  "rgb": {
    "r": 99,
    "g": 136,
    "b": 238
  },
  "hsl": {
    "h": 224.029,
    "s": 80.347,
    "l": 66.078
  },
  "oklch": {
    "l": 0.64779,
    "c": 0.15795,
    "h": 267
  },
  "luminance": 0.26434
}

Semantic roles & 50–950 ramp

primary

#6388EE

secondary

#EDE1C0

accent

#A409DD

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #6388EE

Body copy rendered with the generated semantic roles for this colour.

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