#638FEC#638FEC

#638FEC is a light, vivid blue. Relative luminance 0.284; OKLCH L 66.1% C 0.147 H 263.7°. Best body text is #000000 at 6.67:1 contrast (WCAG AA passes).

Color values

HEX	#638FEC
RGB	rgb(99, 143, 236)
HSL	hsl(221, 78%, 66%)
HSV	hsv(221, 58%, 93%)
CMYK	cmyk(58.1%, 39.4%, 0%, 7.5%)
CIE-LAB	lab(60.20, 12.35, -51.48)
CIE-LCH	lch(60.20, 52.94, 283.49°)
OKLab	oklab(66.1% -0.016 -0.1462)
OKLCH	oklch(66.1% 0.147 263.7)
XYZ	xyz(30.1032, 28.3512, 83.2266)
Luminance	0.2835 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FEC #ECC063

analogous

#63D3EC #638FEC #7B63EC

triadic

#638FEC #EC638F #8FEC63

tetradic

#638FEC #EC63D3 #ECC063 #63EC7B

square

#638FEC #EC63D3 #ECC063 #63EC7B

split-complementary

#638FEC #EC7B63 #D3EC63

monochromatic

#174DBE #2C68E5 #638FEC #9AB6F3 #D0DDF9

Accessibility & contrast

On white

3.15

#638FEC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.67

#638FEC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FEC

6.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FEC	#FFFFFF	#000000	##000000
##638FEC	1.00	3.15	6.67	6.67
#FFFFFF	3.15	1.00	21.00	21.00
#000000	6.67	21.00	1.00	1.00
##000000	6.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6798F0

Deuteranopia (green-blind)

#558BEA

Tritanopia (blue-blind)

#00A4B2

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638fec;
/* rgb */ color: rgb(99, 143, 236);
/* oklch */ color: oklch(66.1% 0.147 263.7);

Tailwind

colors: {
  custom: {
    50: '#99aff2',
    500: '#638fec',
    950: '#000000',
  },
}

SCSS

$custom: #638fec;
$custom-light: #99aff2;
$custom-dark: #000000;

JSON

{
  "hex": "#638fec",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 236
  },
  "hsl": {
    "h": 220.73,
    "s": 78.286,
    "l": 65.686
  },
  "oklch": {
    "l": 0.66099,
    "c": 0.14708,
    "h": 263.7
  },
  "luminance": 0.28354
}

Semantic roles & 50–950 ramp

primary

#638FEC

secondary

#ECDEBF

accent

#980BDB

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FEC

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

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