#637AFA#637AFA

#637AFA is a light, vivid blue. Relative luminance 0.235; OKLCH L 62.8% C 0.191 H 272.1°. Best body text is #000000 at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#637AFA
RGB	rgb(99, 122, 250)
HSL	hsl(231, 94%, 68%)
HSV	hsv(231, 60%, 98%)
CMYK	cmyk(60.4%, 51.2%, 0%, 2%)
CIE-LAB	lab(55.55, 29.55, -66.67)
CIE-LCH	lch(55.55, 72.92, 293.90°)
OKLab	oklab(62.81% 0.007 -0.191)
OKLCH	oklch(62.81% 0.191 272.1)
XYZ	xyz(29.3547, 23.4714, 93.4075)
Luminance	0.2347 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637AFA #FAE363

analogous

#63C5FA #637AFA #9763FA

triadic

#637AFA #FA637A #7AFA63

tetradic

#637AFA #FA63C5 #FAE363 #63FA97

square

#637AFA #FA63C5 #FAE363 #63FA97

split-complementary

#637AFA #FA9763 #C5FA63

monochromatic

#0727DC #2847F8 #637AFA #9EADFC #DADFFE

Accessibility & contrast

On white

3.69

#637AFA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.69

#637AFA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637AFA

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637AFA	#FFFFFF	#000000	##000000
##637AFA	1.00	3.69	5.69	5.69
#FFFFFF	3.69	1.00	21.00	21.00
#000000	5.69	21.00	1.00	1.00
##000000	5.69	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F8CFF

Deuteranopia (green-blind)

#007FF7

Tritanopia (blue-blind)

#0098AE

Achromatopsia (no color)

#858585

Design tokens & code

CSS

--color: #637afa;
/* rgb */ color: rgb(99, 122, 250);
/* oklch */ color: oklch(62.8% 0.191 272.1);

Tailwind

colors: {
  custom: {
    50: '#9ca0fd',
    500: '#637afa',
    950: '#000000',
  },
}

SCSS

$custom: #637afa;
$custom-light: #9ca0fd;
$custom-dark: #000000;

JSON

{
  "hex": "#637afa",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 250
  },
  "hsl": {
    "h": 230.861,
    "s": 93.789,
    "l": 68.431
  },
  "oklch": {
    "l": 0.62808,
    "c": 0.19118,
    "h": 272.1
  },
  "luminance": 0.23474
}

Semantic roles & 50–950 ramp

primary

#637AFA

secondary

#F3ECC6

accent

#C300E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0E18

muted

#7F7E86

Preview Lab

Preview with #637AFA

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

Preview Lab → · Contrast checker → · Palette generator →