#638EEB#638EEB

#638EEB is a light, vivid blue. Relative luminance 0.280; OKLCH L 65.8% C 0.147 H 264.1°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#638EEB
RGB	rgb(99, 142, 235)
HSL	hsl(221, 77%, 65%)
HSV	hsv(221, 58%, 92%)
CMYK	cmyk(57.9%, 39.6%, 0%, 7.8%)
CIE-LAB	lab(59.88, 12.62, -51.43)
CIE-LCH	lch(59.88, 52.96, 283.79°)
OKLab	oklab(65.83% -0.0152 -0.1461)
OKLCH	oklch(65.83% 0.147 264.1)
XYZ	xyz(29.8089, 27.9943, 82.4138)
Luminance	0.2800 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638EEB #EBC063

analogous

#63D2EB #638EEB #7C63EB

triadic

#638EEB #EB638E #8EEB63

tetradic

#638EEB #EB63D2 #EBC063 #63EB7C

square

#638EEB #EB63D2 #EBC063 #63EB7C

split-complementary

#638EEB #EB7C63 #D2EB63

monochromatic

#184CBC #2D67E4 #638EEB #99B5F2 #CFDDF9

Accessibility & contrast

On white

3.18

#638EEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.60

#638EEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638EEB

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638EEB	#FFFFFF	#000000	##000000
##638EEB	1.00	3.18	6.60	6.60
#FFFFFF	3.18	1.00	21.00	21.00
#000000	6.60	21.00	1.00	1.00
##000000	6.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6697EF

Deuteranopia (green-blind)

#548BE9

Tritanopia (blue-blind)

#00A3B1

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #638eeb;
/* rgb */ color: rgb(99, 142, 235);
/* oklch */ color: oklch(65.8% 0.147 264.1);

Tailwind

colors: {
  custom: {
    50: '#99aef2',
    500: '#638eeb',
    950: '#000000',
  },
}

SCSS

$custom: #638eeb;
$custom-light: #99aef2;
$custom-dark: #000000;

JSON

{
  "hex": "#638eeb",
  "rgb": {
    "r": 99,
    "g": 142,
    "b": 235
  },
  "hsl": {
    "h": 221.029,
    "s": 77.273,
    "l": 65.49
  },
  "oklch": {
    "l": 0.65834,
    "c": 0.14687,
    "h": 264.1
  },
  "luminance": 0.27997
}

Semantic roles & 50–950 ramp

primary

#638EEB

secondary

#ECDDBE

accent

#990CDA

background

#FAFAFE

surface

#F3F4FD

border

#CDCED5

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638EEB

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

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