#638EF0#638EF0

#638EF0 is a light, vivid blue. Relative luminance 0.283; OKLCH L 66.1% C 0.154 H 264.7°. Best body text is #000000 at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#638EF0
RGB	rgb(99, 142, 240)
HSL	hsl(222, 82%, 66%)
HSV	hsv(222, 59%, 94%)
CMYK	cmyk(58.8%, 40.8%, 0%, 5.9%)
CIE-LAB	lab(60.15, 14.25, -53.78)
CIE-LCH	lch(60.15, 55.63, 284.84°)
OKLab	oklab(66.12% -0.0142 -0.1529)
OKLCH	oklch(66.12% 0.154 264.7)
XYZ	xyz(30.5414, 28.2874, 86.2717)
Luminance	0.2829 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EF0 #F0C563

analogous

#63D5F0 #638EF0 #7F63F0

triadic

#638EF0 #F0638E #8EF063

tetradic

#638EF0 #F063D5 #F0C563 #63F07F

square

#638EF0 #F063D5 #F0C563 #63F07F

split-complementary

#638EF0 #F07F63 #D5F063

monochromatic

#1349C6 #2B66EB #638EF0 #9BB6F5 #D3DFFB

Accessibility & contrast

On white

3.15

#638EF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.66

#638EF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EF0

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EF0	#FFFFFF	#000000	##000000
##638EF0	1.00	3.15	6.66	6.66
#FFFFFF	3.15	1.00	21.00	21.00
#000000	6.66	21.00	1.00	1.00
##000000	6.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6398F4

Deuteranopia (green-blind)

#508BEE

Tritanopia (blue-blind)

#00A4B3

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638ef0;
/* rgb */ color: rgb(99, 142, 240);
/* oklch */ color: oklch(66.1% 0.154 264.7);

Tailwind

colors: {
  custom: {
    50: '#9aaef5',
    500: '#638ef0',
    950: '#000000',
  },
}

SCSS

$custom: #638ef0;
$custom-light: #9aaef5;
$custom-dark: #000000;

JSON

{
  "hex": "#638ef0",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 240
  },
  "hsl": {
    "h": 221.702,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.66124,
    "c": 0.15361,
    "h": 264.7
  },
  "luminance": 0.2829
}

Semantic roles & 50–950 ramp

primary

#638EF0

secondary

#EEE0C1

accent

#9D07DF

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638EF0

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

Preview Lab → · Contrast checker → · Palette generator →