#638CF5#638CF5

#638CF5 is a light, vivid blue. Relative luminance 0.280; OKLCH L 66.0% C 0.163 H 266.0°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#638CF5
RGB	rgb(99, 140, 245)
HSL	hsl(223, 88%, 67%)
HSV	hsv(223, 60%, 96%)
CMYK	cmyk(59.6%, 42.9%, 0%, 3.9%)
CIE-LAB	lab(59.89, 17.07, -56.95)
CIE-LCH	lch(59.89, 59.46, 286.68°)
OKLab	oklab(66.01% -0.0113 -0.1623)
OKLCH	oklch(66.01% 0.163 266)
XYZ	xyz(30.9995, 27.9988, 90.1392)
Luminance	0.2800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CF5 #F5CC63

analogous

#63D5F5 #638CF5 #8363F5

triadic

#638CF5 #F5638C #8CF563

tetradic

#638CF5 #F563D5 #F5CC63 #63F583

square

#638CF5 #F563D5 #F5CC63 #63F583

split-complementary

#638CF5 #F58363 #D5F563

monochromatic

#0D44D0 #2962F1 #638CF5 #9DB6F9 #D6E1FC

Accessibility & contrast

On white

3.18

#638CF5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.60

#638CF5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CF5

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CF5	#FFFFFF	#000000	##000000
##638CF5	1.00	3.18	6.60	6.60
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.60	21.00	1.00	1.00
##000000	6.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C97F9

Deuteranopia (green-blind)

#478AF3

Tritanopia (blue-blind)

#00A4B5

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #638cf5;
/* rgb */ color: rgb(99, 140, 245);
/* oklch */ color: oklch(66.0% 0.163 266.0);

Tailwind

colors: {
  custom: {
    50: '#9badf9',
    500: '#638cf5',
    950: '#000000',
  },
}

SCSS

$custom: #638cf5;
$custom-light: #9badf9;
$custom-dark: #000000;

JSON

{
  "hex": "#638cf5",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 245
  },
  "hsl": {
    "h": 223.151,
    "s": 87.952,
    "l": 67.451
  },
  "oklch": {
    "l": 0.66012,
    "c": 0.16268,
    "h": 266
  },
  "luminance": 0.28001
}

Semantic roles & 50–950 ramp

primary

#638CF5

secondary

#F1E4C3

accent

#A501E5

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638CF5

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

Preview Lab → · Contrast checker → · Palette generator →