#638FEA#638FEA

#638FEA is a light, vivid blue. Relative luminance 0.282; OKLCH L 66.0% C 0.144 H 263.5°. Best body text is #000000 at 6.65:1 contrast (WCAG AA passes).

Color values

HEX	#638FEA
RGB	rgb(99, 143, 234)
HSL	hsl(220, 76%, 65%)
HSV	hsv(220, 58%, 92%)
CMYK	cmyk(57.7%, 38.9%, 0%, 8.2%)
CIE-LAB	lab(60.10, 11.71, -50.53)
CIE-LCH	lch(60.10, 51.87, 283.04°)
OKLab	oklab(65.99% -0.0165 -0.1434)
OKLCH	oklch(65.99% 0.144 263.5)
XYZ	xyz(29.8142, 28.2356, 81.7048)
Luminance	0.2824 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FEA #EABE63

analogous

#63D3EA #638FEA #7A63EA

triadic

#638FEA #EA638F #8FEA63

tetradic

#638FEA #EA63D3 #EABE63 #63EA7A

square

#638FEA #EA63D3 #EABE63 #63EA7A

split-complementary

#638FEA #EA7A63 #D3EA63

monochromatic

#194DBA #2D68E3 #638FEA #99B6F1 #CFDCF9

Accessibility & contrast

On white

3.16

#638FEA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.65

#638FEA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FEA

6.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FEA	#FFFFFF	#000000	##000000
##638FEA	1.00	3.16	6.65	6.65
#FFFFFF	3.16	1.00	21.00	21.00
#000000	6.65	21.00	1.00	1.00
##000000	6.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6898EE

Deuteranopia (green-blind)

#578BE8

Tritanopia (blue-blind)

#00A3B1

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638fea;
/* rgb */ color: rgb(99, 143, 234);
/* oklch */ color: oklch(66.0% 0.144 263.5);

Tailwind

colors: {
  custom: {
    50: '#99aff1',
    500: '#638fea',
    950: '#000000',
  },
}

SCSS

$custom: #638fea;
$custom-light: #99aff1;
$custom-dark: #000000;

JSON

{
  "hex": "#638fea",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 234
  },
  "hsl": {
    "h": 220.444,
    "s": 76.271,
    "l": 65.294
  },
  "oklch": {
    "l": 0.65986,
    "c": 0.14438,
    "h": 263.5
  },
  "luminance": 0.28238
}

Semantic roles & 50–950 ramp

primary

#638FEA

secondary

#EBDCBE

accent

#960DD8

background

#F9FAFE

surface

#F2F4FD

border

#CCCED5

text

#0F1017

muted

#7E7F85

Preview Lab

Preview with #638FEA

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

Preview Lab → · Contrast checker → · Palette generator →