#638DEB#638DEB

#638DEB is a light, vivid blue. Relative luminance 0.277; OKLCH L 65.6% C 0.148 H 264.5°. Best body text is #000000 at 6.54:1 contrast (WCAG AA passes).

Color values

HEX	#638DEB
RGB	rgb(99, 141, 235)
HSL	hsl(221, 77%, 65%)
HSV	hsv(221, 58%, 92%)
CMYK	cmyk(57.9%, 40%, 0%, 7.8%)
CIE-LAB	lab(59.62, 13.22, -51.86)
CIE-LCH	lch(59.62, 53.52, 284.30°)
OKLab	oklab(65.63% -0.0141 -0.1473)
OKLCH	oklch(65.63% 0.148 264.5)
XYZ	xyz(29.6607, 27.6981, 82.3644)
Luminance	0.2770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638DEB #EBC163

analogous

#63D1EB #638DEB #7D63EB

triadic

#638DEB #EB638D #8DEB63

tetradic

#638DEB #EB63D1 #EBC163 #63EB7D

square

#638DEB #EB63D1 #EBC163 #63EB7D

split-complementary

#638DEB #EB7D63 #D1EB63

monochromatic

#184BBC #2D65E4 #638DEB #99B5F2 #CFDCF9

Accessibility & contrast

On white

3.21

#638DEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.54

#638DEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638DEB

6.54:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638DEB	#FFFFFF	#000000	##000000
##638DEB	1.00	3.21	6.54	6.54
#FFFFFF	3.21	1.00	21.00	21.00
#000000	6.54	21.00	1.00	1.00
##000000	6.54	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6596EF

Deuteranopia (green-blind)

#538AE9

Tritanopia (blue-blind)

#00A2B1

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #638deb;
/* rgb */ color: rgb(99, 141, 235);
/* oklch */ color: oklch(65.6% 0.148 264.5);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#638deb",
  "rgb": {
    "r": 99,
    "g": 141,
    "b": 235
  },
  "hsl": {
    "h": 221.471,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.65627,
    "c": 0.14802,
    "h": 264.5
  },
  "luminance": 0.27701
}

Semantic roles & 50–950 ramp

primary

#638DEB

secondary

#ECDEBE

accent

#9A0CDA

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638DEB

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

Preview Lab → · Contrast checker → · Palette generator →