#638CEC#638CEC

#638CEC is a light, vivid blue. Relative luminance 0.275; OKLCH L 65.5% C 0.151 H 265.1°. Best body text is #000000 at 6.49:1 contrast (WCAG AA passes).

Color values

HEX	#638CEC
RGB	rgb(99, 140, 236)
HSL	hsl(222, 78%, 66%)
HSV	hsv(222, 58%, 93%)
CMYK	cmyk(58.1%, 40.7%, 0%, 7.5%)
CIE-LAB	lab(59.40, 14.14, -52.76)
CIE-LCH	lch(59.40, 54.62, 285.00°)
OKLab	oklab(65.48% -0.0129 -0.15)
OKLCH	oklch(65.48% 0.151 265.1)
XYZ	xyz(29.6588, 27.4625, 83.0785)
Luminance	0.2747 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CEC #ECC363

analogous

#63D0EC #638CEC #7E63EC

triadic

#638CEC #EC638C #8CEC63

tetradic

#638CEC #EC63D0 #ECC363 #63EC7E

square

#638CEC #EC63D0 #ECC363 #63EC7E

split-complementary

#638CEC #EC7E63 #D0EC63

monochromatic

#1749BE #2C64E5 #638CEC #9AB4F3 #D0DCF9

Accessibility & contrast

On white

3.23

#638CEC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.49

#638CEC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CEC

6.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CEC	#FFFFFF	#000000	##000000
##638CEC	1.00	3.23	6.49	6.49
#FFFFFF	3.23	1.00	21.00	21.00
#000000	6.49	21.00	1.00	1.00
##000000	6.49	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6296F0

Deuteranopia (green-blind)

#5089EA

Tritanopia (blue-blind)

#00A1B0

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #638cec;
/* rgb */ color: rgb(99, 140, 236);
/* oklch */ color: oklch(65.5% 0.151 265.1);

Tailwind

colors: {
  custom: {
    50: '#99adf2',
    500: '#638cec',
    950: '#000000',
  },
}

SCSS

$custom: #638cec;
$custom-light: #99adf2;
$custom-dark: #000000;

JSON

{
  "hex": "#638cec",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 236
  },
  "hsl": {
    "h": 222.044,
    "s": 78.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.65478,
    "c": 0.15053,
    "h": 265.1
  },
  "luminance": 0.27465
}

Semantic roles & 50–950 ramp

primary

#638CEC

secondary

#ECDFBF

accent

#9C0BDB

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638CEC

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

Preview Lab → · Contrast checker → · Palette generator →