#638CF7#638CF7

#638CF7 is a light, vivid blue. Relative luminance 0.281; OKLCH L 66.1% C 0.165 H 266.2°. Best body text is #000000 at 6.62:1 contrast (WCAG AA passes).

Color values

HEX	#638CF7
RGB	rgb(99, 140, 247)
HSL	hsl(223, 90%, 68%)
HSV	hsv(223, 60%, 97%)
CMYK	cmyk(59.9%, 43.3%, 0%, 3.1%)
CIE-LAB	lab(60.00, 17.72, -57.88)
CIE-LCH	lch(60.00, 60.53, 287.03°)
OKLab	oklab(66.13% -0.0109 -0.165)
OKLCH	oklch(66.13% 0.165 266.2)
XYZ	xyz(31.3064, 28.1215, 91.7559)
Luminance	0.2812 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CF7 #F7CE63

analogous

#63D6F7 #638CF7 #8463F7

triadic

#638CF7 #F7638C #8CF763

tetradic

#638CF7 #F763D6 #F7CE63 #63F784

square

#638CF7 #F763D6 #F7CE63 #63F784

split-complementary

#638CF7 #F78463 #D6F763

monochromatic

#0B43D5 #2961F4 #638CF7 #9DB7FA #D7E2FD

Accessibility & contrast

On white

3.17

#638CF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.62

#638CF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CF7

6.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CF7	#FFFFFF	#000000	##000000
##638CF7	1.00	3.17	6.62	6.62
#FFFFFF	3.17	1.00	21.00	21.00
#000000	6.62	21.00	1.00	1.00
##000000	6.62	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5B98FB

Deuteranopia (green-blind)

#458AF5

Tritanopia (blue-blind)

#00A4B5

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638cf7;
/* rgb */ color: rgb(99, 140, 247);
/* oklch */ color: oklch(66.1% 0.165 266.2);

Tailwind

colors: {
  custom: {
    50: '#9badfa',
    500: '#638cf7',
    950: '#000000',
  },
}

SCSS

$custom: #638cf7;
$custom-light: #9badfa;
$custom-dark: #000000;

JSON

{
  "hex": "#638cf7",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 247
  },
  "hsl": {
    "h": 223.378,
    "s": 90.244,
    "l": 67.843
  },
  "oklch": {
    "l": 0.66133,
    "c": 0.16536,
    "h": 266.2
  },
  "luminance": 0.28124
}

Semantic roles & 50–950 ramp

primary

#638CF7

secondary

#F2E5C4

accent

#A600E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638CF7

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

Preview Lab → · Contrast checker → · Palette generator →