#638EF9#638EF9

#638EF9 is a light, vivid blue. Relative luminance 0.288; OKLCH L 66.7% C 0.166 H 265.6°. Best body text is #000000 at 6.77:1 contrast (WCAG AA passes).

Color values

HEX	#638EF9
RGB	rgb(99, 142, 249)
HSL	hsl(223, 93%, 68%)
HSV	hsv(223, 60%, 98%)
CMYK	cmyk(60.2%, 43%, 0%, 2.4%)
CIE-LAB	lab(60.64, 17.19, -57.96)
CIE-LCH	lch(60.64, 60.45, 286.52°)
OKLab	oklab(66.66% -0.0126 -0.1652)
OKLCH	oklch(66.66% 0.166 265.6)
XYZ	xyz(31.9116, 28.8355, 93.4883)
Luminance	0.2884 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EF9 #F9CE63

analogous

#63D9F9 #638EF9 #8363F9

triadic

#638EF9 #F9638E #8EF963

tetradic

#638EF9 #F963D9 #F9CE63 #63F983

square

#638EF9 #F963D9 #F9CE63 #63F983

split-complementary

#638EF9 #F98363 #D9F963

monochromatic

#0844D9 #2863F7 #638EF9 #9EB9FB #D9E3FE

Accessibility & contrast

On white

3.10

#638EF9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.77

#638EF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EF9

6.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EF9	#FFFFFF	#000000	##000000
##638EF9	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)

#5D9AFD

Deuteranopia (green-blind)

#478CF7

Tritanopia (blue-blind)

#00A6B7

Achromatopsia (no color)

#929292

Design tokens & code

CSS

--color: #638ef9;
/* rgb */ color: rgb(99, 142, 249);
/* oklch */ color: oklch(66.7% 0.166 265.6);

Tailwind

colors: {
  custom: {
    50: '#9baefc',
    500: '#638ef9',
    950: '#000000',
  },
}

SCSS

$custom: #638ef9;
$custom-light: #9baefc;
$custom-dark: #000000;

JSON

{
  "hex": "#638ef9",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 249
  },
  "hsl": {
    "h": 222.8,
    "s": 92.593,
    "l": 68.235
  },
  "oklch": {
    "l": 0.66658,
    "c": 0.1657,
    "h": 265.6
  },
  "luminance": 0.28838
}

Semantic roles & 50–950 ramp

primary

#638EF9

secondary

#F3E6C5

accent

#A400E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638EF9

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

Preview Lab → · Contrast checker → · Palette generator →