#638CF1#638CF1

#638CF1 is a light, vivid blue. Relative luminance 0.278; OKLCH L 65.8% C 0.157 H 265.6°. Best body text is #000000 at 6.55:1 contrast (WCAG AA passes).

Color values

HEX	#638CF1
RGB	rgb(99, 140, 241)
HSL	hsl(223, 84%, 67%)
HSV	hsv(223, 59%, 95%)
CMYK	cmyk(58.9%, 41.9%, 0%, 5.5%)
CIE-LAB	lab(59.67, 15.76, -55.09)
CIE-LCH	lch(59.67, 57.31, 285.97°)
OKLab	oklab(65.77% -0.012 -0.1568)
OKLCH	oklch(65.77% 0.157 265.6)
XYZ	xyz(30.3954, 27.7571, 86.9579)
Luminance	0.2776 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CF1 #F1C863

analogous

#63D3F1 #638CF1 #8163F1

triadic

#638CF1 #F1638C #8CF163

tetradic

#638CF1 #F163D3 #F1C863 #63F181

square

#638CF1 #F163D3 #F1C863 #63F181

split-complementary

#638CF1 #F18163 #D3F163

monochromatic

#1246C8 #2B63EC #638CF1 #9BB5F6 #D3DFFB

Accessibility & contrast

On white

3.21

#638CF1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.55

#638CF1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CF1

6.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CF1	#FFFFFF	#000000	##000000
##638CF1	1.00	3.21	6.55	6.55
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.55	21.00	1.00	1.00
##000000	6.55	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F97F5

Deuteranopia (green-blind)

#4B8AEF

Tritanopia (blue-blind)

#00A3B3

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #638cf1;
/* rgb */ color: rgb(99, 140, 241);
/* oklch */ color: oklch(65.8% 0.157 265.6);

Tailwind

colors: {
  custom: {
    50: '#9aadf6',
    500: '#638cf1',
    950: '#000000',
  },
}

SCSS

$custom: #638cf1;
$custom-light: #9aadf6;
$custom-dark: #000000;

JSON

{
  "hex": "#638cf1",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 241
  },
  "hsl": {
    "h": 222.676,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.65773,
    "c": 0.15729,
    "h": 265.6
  },
  "luminance": 0.2776
}

Semantic roles & 50–950 ramp

primary

#638CF1

secondary

#EFE2C1

accent

#A106E0

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638CF1

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

Preview Lab → · Contrast checker → · Palette generator →