#637FF8#637FF8

#637FF8 is a light, vivid blue. Relative luminance 0.246; OKLCH L 63.6% C 0.182 H 270.6°. Best body text is #000000 at 5.92:1 contrast (WCAG AA passes).

Color values

HEX	#637FF8
RGB	rgb(99, 127, 248)
HSL	hsl(229, 91%, 68%)
HSV	hsv(229, 60%, 97%)
CMYK	cmyk(60.1%, 48.8%, 0%, 2.7%)
CIE-LAB	lab(56.69, 25.87, -63.73)
CIE-LCH	lch(56.69, 68.78, 292.09°)
OKLab	oklab(63.63% 0.0021 -0.1824)
OKLCH	oklch(63.63% 0.182 270.6)
XYZ	xyz(29.6726, 24.6063, 91.9745)
Luminance	0.2461 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637FF8 #F8DC63

analogous

#63C9F8 #637FF8 #9163F8

triadic

#637FF8 #F8637F #7FF863

tetradic

#637FF8 #F863C9 #F8DC63 #63F891

square

#637FF8 #F863C9 #F8DC63 #63F891

split-complementary

#637FF8 #F89163 #C9F863

monochromatic

#0A30D7 #284FF5 #637FF8 #9EAFFB #D8DFFD

Accessibility & contrast

On white

3.55

#637FF8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.92

#637FF8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FF8

5.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637FF8	#FFFFFF	#000000	##000000
##637FF8	1.00	3.55	5.92	5.92
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.92	21.00	1.00	1.00
##000000	5.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F8FFC

Deuteranopia (green-blind)

#2082F5

Tritanopia (blue-blind)

#009BB0

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #637ff8;
/* rgb */ color: rgb(99, 127, 248);
/* oklch */ color: oklch(63.6% 0.182 270.6);

Tailwind

colors: {
  custom: {
    50: '#9ca3fb',
    500: '#637ff8',
    950: '#000000',
  },
}

SCSS

$custom: #637ff8;
$custom-light: #9ca3fb;
$custom-dark: #000000;

JSON

{
  "hex": "#637ff8",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 248
  },
  "hsl": {
    "h": 228.725,
    "s": 91.411,
    "l": 68.039
  },
  "oklch": {
    "l": 0.63627,
    "c": 0.18237,
    "h": 270.6
  },
  "luminance": 0.24609
}

Semantic roles & 50–950 ramp

primary

#637FF8

secondary

#F2EAC5

accent

#BA00E6

background

#FAFAFF

surface

#F4F3FF

border

#CECDD7

text

#0F0F17

muted

#7F7F85

Preview Lab

Preview with #637FF8

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

Preview Lab → · Contrast checker → · Palette generator →