#6388FB#6388FB

#6388FB is a light, vivid blue. Relative luminance 0.272; OKLCH L 65.6% C 0.175 H 267.9°. Best body text is #000000 at 6.45:1 contrast (WCAG AA passes).

Color values

HEX	#6388FB
RGB	rgb(99, 136, 251)
HSL	hsl(225, 95%, 69%)
HSV	hsv(225, 61%, 98%)
CMYK	cmyk(60.6%, 45.8%, 0%, 1.6%)
CIE-LAB	lab(59.18, 21.43, -61.39)
CIE-LCH	lch(59.18, 65.02, 289.25°)
OKLab	oklab(65.58% -0.0063 -0.1754)
OKLCH	oklch(65.58% 0.175 267.9)
XYZ	xyz(31.3564, 27.2233, 94.8503)
Luminance	0.2723 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6388FB #FBD663

analogous

#63D4FB #6388FB #8A63FB

triadic

#6388FB #FB6388 #88FB63

tetradic

#6388FB #FB63D4 #FBD663 #63FB8A

square

#6388FB #FB63D4 #FBD663 #63FB8A

split-complementary

#6388FB #FB8A63 #D4FB63

monochromatic

#063ADE #275AF9 #6388FB #9FB6FD #DAE3FE

Accessibility & contrast

On white

3.26

#6388FB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.45

#6388FB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6388FB

6.45:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6388FB	#FFFFFF	#000000	##000000
##6388FB	1.00	3.26	6.45	6.45
#FFFFFF	3.26	1.00	21.00	21.00
#000000	6.45	21.00	1.00	1.00
##000000	6.45	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5096FF

Deuteranopia (green-blind)

#3788F9

Tritanopia (blue-blind)

#00A2B5

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #6388fb;
/* rgb */ color: rgb(99, 136, 251);
/* oklch */ color: oklch(65.6% 0.175 267.9);

Tailwind

colors: {
  custom: {
    50: '#9caafd',
    500: '#6388fb',
    950: '#000000',
  },
}

SCSS

$custom: #6388fb;
$custom-light: #9caafd;
$custom-dark: #000000;

JSON

{
  "hex": "#6388fb",
  "rgb": {
    "r": 99,
    "g": 136,
    "b": 251
  },
  "hsl": {
    "h": 225.395,
    "s": 95,
    "l": 68.627
  },
  "oklch": {
    "l": 0.6558,
    "c": 0.17547,
    "h": 267.9
  },
  "luminance": 0.27226
}

Semantic roles & 50–950 ramp

primary

#6388FB

secondary

#F4E9C6

accent

#AE00E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1018

muted

#7F7F86

Preview Lab

Preview with #6388FB

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

Preview Lab → · Contrast checker → · Palette generator →