#638FF8#638FF8

#638FF8 is a light, vivid blue. Relative luminance 0.291; OKLCH L 66.8% C 0.163 H 265.2°. Best body text is #000000 at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#638FF8
RGB	rgb(99, 143, 248)
HSL	hsl(222, 91%, 68%)
HSV	hsv(222, 60%, 97%)
CMYK	cmyk(60.1%, 42.3%, 0%, 2.7%)
CIE-LAB	lab(60.85, 16.26, -57.08)
CIE-LCH	lch(60.85, 59.35, 285.90°)
OKLab	oklab(66.8% -0.0138 -0.1626)
OKLCH	oklch(66.8% 0.163 265.2)
XYZ	xyz(31.9055, 29.0721, 92.7189)
Luminance	0.2908 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FF8 #F8CC63

analogous

#63D9F8 #638FF8 #8163F8

triadic

#638FF8 #F8638F #8FF863

tetradic

#638FF8 #F863D9 #F8CC63 #63F881

square

#638FF8 #F863D9 #F8CC63 #63F881

split-complementary

#638FF8 #F88163 #D9F863

monochromatic

#0A46D7 #2865F5 #638FF8 #9EB9FB #D8E3FD

Accessibility & contrast

On white

3.08

#638FF8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.82

#638FF8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FF8

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FF8	#FFFFFF	#000000	##000000
##638FF8	1.00	3.08	6.82	6.82
#FFFFFF	3.08	1.00	21.00	21.00
#000000	6.82	21.00	1.00	1.00
##000000	6.82	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#609AFC

Deuteranopia (green-blind)

#4A8CF6

Tritanopia (blue-blind)

#00A7B7

Achromatopsia (no color)

#939393

Design tokens & code

CSS

--color: #638ff8;
/* rgb */ color: rgb(99, 143, 248);
/* oklch */ color: oklch(66.8% 0.163 265.2);

Tailwind

colors: {
  custom: {
    50: '#9baffb',
    500: '#638ff8',
    950: '#000000',
  },
}

SCSS

$custom: #638ff8;
$custom-light: #9baffb;
$custom-dark: #000000;

JSON

{
  "hex": "#638ff8",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 248
  },
  "hsl": {
    "h": 222.282,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.66801,
    "c": 0.16319,
    "h": 265.2
  },
  "luminance": 0.29075
}

Semantic roles & 50–950 ramp

primary

#638FF8

secondary

#F2E5C5

accent

#A200E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FF8

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

Preview Lab → · Contrast checker → · Palette generator →