#638FF0#638FF0

#638FF0 is a light, vivid blue. Relative luminance 0.286; OKLCH L 66.3% C 0.152 H 264.3°. Best body text is #000000 at 6.72:1 contrast (WCAG AA passes).

Color values

HEX	#638FF0
RGB	rgb(99, 143, 240)
HSL	hsl(221, 82%, 66%)
HSV	hsv(221, 59%, 94%)
CMYK	cmyk(58.8%, 40.4%, 0%, 5.9%)
CIE-LAB	lab(60.41, 13.65, -53.35)
CIE-LCH	lch(60.41, 55.07, 284.35°)
OKLab	oklab(66.33% -0.0152 -0.1517)
OKLCH	oklch(66.33% 0.152 264.3)
XYZ	xyz(30.6908, 28.5863, 86.3215)
Luminance	0.2859 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FF0 #F0C463

analogous

#63D5F0 #638FF0 #7E63F0

triadic

#638FF0 #F0638F #8FF063

tetradic

#638FF0 #F063D5 #F0C463 #63F07E

square

#638FF0 #F063D5 #F0C463 #63F07E

split-complementary

#638FF0 #F07E63 #D5F063

monochromatic

#134BC6 #2B67EB #638FF0 #9BB7F5 #D3DFFB

Accessibility & contrast

On white

3.13

#638FF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.72

#638FF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FF0

6.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FF0	#FFFFFF	#000000	##000000
##638FF0	1.00	3.13	6.72	6.72
#FFFFFF	3.13	1.00	21.00	21.00
#000000	6.72	21.00	1.00	1.00
##000000	6.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6599F4

Deuteranopia (green-blind)

#528CEE

Tritanopia (blue-blind)

#00A5B4

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #638ff0;
/* rgb */ color: rgb(99, 143, 240);
/* oklch */ color: oklch(66.3% 0.152 264.3);

Tailwind

colors: {
  custom: {
    50: '#9aaff5',
    500: '#638ff0',
    950: '#000000',
  },
}

SCSS

$custom: #638ff0;
$custom-light: #9aaff5;
$custom-dark: #000000;

JSON

{
  "hex": "#638ff0",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 240
  },
  "hsl": {
    "h": 221.277,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.6633,
    "c": 0.15246,
    "h": 264.3
  },
  "luminance": 0.28589
}

Semantic roles & 50–950 ramp

primary

#638FF0

secondary

#EEE0C1

accent

#9B07DF

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FF0

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

Preview Lab → · Contrast checker → · Palette generator →