#638FEB#638FEB

#638FEB is a light, vivid blue. Relative luminance 0.283; OKLCH L 66.0% C 0.146 H 263.6°. Best body text is #000000 at 6.66:1 contrast (WCAG AA passes).

Color values

HEX	#638FEB
RGB	rgb(99, 143, 235)
HSL	hsl(221, 77%, 65%)
HSV	hsv(221, 58%, 92%)
CMYK	cmyk(57.9%, 39.1%, 0%, 7.8%)
CIE-LAB	lab(60.15, 12.03, -51.01)
CIE-LCH	lch(60.15, 52.41, 283.27°)
OKLab	oklab(66.04% -0.0162 -0.1448)
OKLCH	oklch(66.04% 0.146 263.6)
XYZ	xyz(29.9583, 28.2932, 82.4636)
Luminance	0.2830 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638FEB #EBBF63

analogous

#63D3EB #638FEB #7B63EB

triadic

#638FEB #EB638F #8FEB63

tetradic

#638FEB #EB63D3 #EBBF63 #63EB7B

square

#638FEB #EB63D3 #EBBF63 #63EB7B

split-complementary

#638FEB #EB7B63 #D3EB63

monochromatic

#184DBC #2D68E4 #638FEB #99B6F2 #CFDDF9

Accessibility & contrast

On white

3.15

#638FEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.66

#638FEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638FEB

6.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638FEB	#FFFFFF	#000000	##000000
##638FEB	1.00	3.15	6.66	6.66
#FFFFFF	3.15	1.00	21.00	21.00
#000000	6.66	21.00	1.00	1.00
##000000	6.66	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6898EF

Deuteranopia (green-blind)

#568BE9

Tritanopia (blue-blind)

#00A3B2

Achromatopsia (no color)

#919191

Design tokens & code

CSS

--color: #638feb;
/* rgb */ color: rgb(99, 143, 235);
/* oklch */ color: oklch(66.0% 0.146 263.6);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#638feb",
  "rgb": {
    "r": 99,
    "g": 143,
    "b": 235
  },
  "hsl": {
    "h": 220.588,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.66042,
    "c": 0.14573,
    "h": 263.6
  },
  "luminance": 0.28296
}

Semantic roles & 50–950 ramp

primary

#638FEB

secondary

#ECDDBE

accent

#970CDA

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638FEB

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

Preview Lab → · Contrast checker → · Palette generator →