#638FF4#638FF4

#638FF4 is a light, vivid blue. Relative luminance 0.288; OKLCH L 66.6% C 0.158 H 264.7°. Best body text is #000000 at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#638FF4
RGB	rgb(99, 143, 244)
HSL	hsl(222, 87%, 67%)
HSV	hsv(222, 59%, 96%)
CMYK	cmyk(59.4%, 41.4%, 0%, 4.3%)
CIE-LAB	lab(60.63, 14.96, -55.22)
CIE-LCH	lch(60.63, 57.21, 285.15°)
OKLab	oklab(66.56% -0.0145 -0.1572)
OKLCH	oklch(66.56% 0.158 264.7)
XYZ	xyz(31.2916, 28.8266, 89.4855)
Luminance	0.2883 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FF4 #F4C863

analogous

#63D8F4 #638FF4 #8063F4

triadic

#638FF4 #F4638F #8FF463

tetradic

#638FF4 #F463D8 #F4C863 #63F480

square

#638FF4 #F463D8 #F4C863 #63F480

split-complementary

#638FF4 #F48063 #D8F463

monochromatic

#0F49CE #2A66F0 #638FF4 #9CB8F8 #D5E1FC

Accessibility & contrast

On white

3.10

#638FF4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.77

#638FF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FF4

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FF4	#FFFFFF	#000000	##000000
##638FF4	1.00	3.10	6.77	6.77
#FFFFFF	3.10	1.00	21.00	21.00
#000000	6.77	21.00	1.00	1.00
##000000	6.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6299F8

Deuteranopia (green-blind)

#4E8CF2

Tritanopia (blue-blind)

#00A6B6

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #638ff4;
/* rgb */ color: rgb(99, 143, 244);
/* oklch */ color: oklch(66.6% 0.158 264.7);

Tailwind

colors: {
  custom: {
    50: '#9baff8',
    500: '#638ff4',
    950: '#000000',
  },
}

SCSS

$custom: #638ff4;
$custom-light: #9baff8;
$custom-dark: #000000;

JSON

{
  "hex": "#638ff4",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 244
  },
  "hsl": {
    "h": 221.793,
    "s": 86.826,
    "l": 67.255
  },
  "oklch": {
    "l": 0.66564,
    "c": 0.15784,
    "h": 264.7
  },
  "luminance": 0.28829
}

Semantic roles & 50–950 ramp

primary

#638FF4

secondary

#F0E2C3

accent

#9F02E3

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FF4

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

Preview Lab → · Contrast checker → · Palette generator →