#637FF7#637FF7

#637FF7 is a light, vivid blue. Relative luminance 0.245; OKLCH L 63.6% C 0.181 H 270.6°. Best body text is #000000 at 5.91:1 contrast (WCAG AA passes).

Color values

HEX	#637FF7
RGB	rgb(99, 127, 247)
HSL	hsl(229, 90%, 68%)
HSV	hsv(229, 60%, 97%)
CMYK	cmyk(59.9%, 48.6%, 0%, 3.1%)
CIE-LAB	lab(56.63, 25.54, -63.28)
CIE-LCH	lch(56.63, 68.24, 291.98°)
OKLab	oklab(63.56% 0.0019 -0.181)
OKLCH	oklch(63.56% 0.181 270.6)
XYZ	xyz(29.5178, 24.5444, 91.1597)
Luminance	0.2455 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637FF7 #F7DB63

analogous

#63C9F7 #637FF7 #9163F7

triadic

#637FF7 #F7637F #7FF763

tetradic

#637FF7 #F763C9 #F7DB63 #63F791

square

#637FF7 #F763C9 #F7DB63 #63F791

split-complementary

#637FF7 #F79163 #C9F763

monochromatic

#0B31D5 #294FF4 #637FF7 #9DAFFA #D7DFFD

Accessibility & contrast

On white

3.55

#637FF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.91

#637FF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FF7

5.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637FF7	#FFFFFF	#000000	##000000
##637FF7	1.00	3.55	5.91	5.91
#FFFFFF	3.55	1.00	21.00	21.00
#000000	5.91	21.00	1.00	1.00
##000000	5.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#408FFB

Deuteranopia (green-blind)

#2382F4

Tritanopia (blue-blind)

#009AAF

Achromatopsia (no color)

#888888

Design tokens & code

CSS

--color: #637ff7;
/* rgb */ color: rgb(99, 127, 247);
/* oklch */ color: oklch(63.6% 0.181 270.6);

Tailwind

colors: {
  custom: {
    50: '#9ba3fa',
    500: '#637ff7',
    950: '#000000',
  },
}

SCSS

$custom: #637ff7;
$custom-light: #9ba3fa;
$custom-dark: #000000;

JSON

{
  "hex": "#637ff7",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 247
  },
  "hsl": {
    "h": 228.649,
    "s": 90.244,
    "l": 67.843
  },
  "oklch": {
    "l": 0.63561,
    "c": 0.18104,
    "h": 270.6
  },
  "luminance": 0.24547
}

Semantic roles & 50–950 ramp

primary

#637FF7

secondary

#F2E9C4

accent

#BA00E6

background

#FAFAFF

surface

#F4F3FF

border

#CECDD7

text

#0F0F17

muted

#7F7F85

Preview Lab

Preview with #637FF7

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

Preview Lab → · Contrast checker → · Palette generator →