#638BFA#638BFA

#638BFA is a light, vivid blue. Relative luminance 0.280; OKLCH L 66.1% C 0.171 H 266.8°. Best body text is #000000 at 6.60:1 contrast (WCAG AA passes).

Color values

HEX	#638BFA
RGB	rgb(99, 139, 250)
HSL	hsl(224, 94%, 68%)
HSV	hsv(224, 60%, 98%)
CMYK	cmyk(60.4%, 44.4%, 0%, 2%)
CIE-LAB	lab(59.90, 19.31, -59.68)
CIE-LCH	lch(59.90, 62.72, 287.93°)
OKLab	oklab(66.11% -0.0094 -0.1703)
OKLCH	oklch(66.11% 0.171 266.8)
XYZ	xyz(31.6276, 28.0173, 94.1651)
Luminance	0.2802 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BFA #FAD263

analogous

#63D6FA #638BFA #8663FA

triadic

#638BFA #FA638B #8BFA63

tetradic

#638BFA #FA63D6 #FAD263 #63FA86

square

#638BFA #FA63D6 #FAD263 #63FA86

split-complementary

#638BFA #FA8663 #D6FA63

monochromatic

#073FDC #285FF8 #638BFA #9EB7FC #DAE3FE

Accessibility & contrast

On white

3.18

#638BFA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.60

#638BFA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BFA

6.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BFA	#FFFFFF	#000000	##000000
##638BFA	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)

#5798FE

Deuteranopia (green-blind)

#3F8AF8

Tritanopia (blue-blind)

#00A4B6

Achromatopsia (no color)

#909090

Design tokens & code

CSS

--color: #638bfa;
/* rgb */ color: rgb(99, 139, 250);
/* oklch */ color: oklch(66.1% 0.171 266.8);

Tailwind

colors: {
  custom: {
    50: '#9bacfc',
    500: '#638bfa',
    950: '#000000',
  },
}

SCSS

$custom: #638bfa;
$custom-light: #9bacfc;
$custom-dark: #000000;

JSON

{
  "hex": "#638bfa",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 250
  },
  "hsl": {
    "h": 224.106,
    "s": 93.789,
    "l": 68.431
  },
  "oklch": {
    "l": 0.66115,
    "c": 0.17056,
    "h": 266.8
  },
  "luminance": 0.2802
}

Semantic roles & 50–950 ramp

primary

#638BFA

secondary

#F3E7C6

accent

#A900E6

background

#FAFAFF

surface

#F4F4FF

border

#CECED7

text

#0F1018

muted

#7F7F86

Preview Lab

Preview with #638BFA

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

Preview Lab → · Contrast checker → · Palette generator →