#638EF3#638EF3

#638EF3 is a light, vivid blue. Relative luminance 0.285; OKLCH L 66.3% C 0.158 H 265.0°. Best body text is #000000 at 6.69:1 contrast (WCAG AA passes).

Color values

HEX	#638EF3
RGB	rgb(99, 142, 243)
HSL	hsl(222, 86%, 67%)
HSV	hsv(222, 59%, 95%)
CMYK	cmyk(59.3%, 41.6%, 0%, 4.7%)
CIE-LAB	lab(60.31, 15.22, -55.18)
CIE-LCH	lch(60.31, 57.24, 285.42°)
OKLab	oklab(66.3% -0.0136 -0.1571)
OKLCH	oklch(66.3% 0.158 265)
XYZ	xyz(30.9907, 28.4671, 88.6382)
Luminance	0.2847 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EF3 #F3C863

analogous

#63D6F3 #638EF3 #8063F3

triadic

#638EF3 #F3638E #8EF363

tetradic

#638EF3 #F363D6 #F3C863 #63F380

square

#638EF3 #F363D6 #F3C863 #63F380

split-complementary

#638EF3 #F38063 #D6F363

monochromatic

#1048CC #2A65EF #638EF3 #9CB7F7 #D5E0FC

Accessibility & contrast

On white

3.14

#638EF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.69

#638EF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EF3

6.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EF3	#FFFFFF	#000000	##000000
##638EF3	1.00	3.14	6.69	6.69
#FFFFFF	3.14	1.00	21.00	21.00
#000000	6.69	21.00	1.00	1.00
##000000	6.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6198F7

Deuteranopia (green-blind)

#4D8BF1

Tritanopia (blue-blind)

#00A5B5

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638ef3;
/* rgb */ color: rgb(99, 142, 243);
/* oklch */ color: oklch(66.3% 0.158 265.0);

Tailwind

colors: {
  custom: {
    50: '#9aaef7',
    500: '#638ef3',
    950: '#000000',
  },
}

SCSS

$custom: #638ef3;
$custom-light: #9aaef7;
$custom-dark: #000000;

JSON

{
  "hex": "#638ef3",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 243
  },
  "hsl": {
    "h": 222.083,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.663,
    "c": 0.15765,
    "h": 265
  },
  "luminance": 0.2847
}

Semantic roles & 50–950 ramp

primary

#638EF3

secondary

#F0E2C2

accent

#A003E2

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638EF3

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

Preview Lab → · Contrast checker → · Palette generator →