#638AF0#638AF0

#638AF0 is a light, vivid blue. Relative luminance 0.271; OKLCH L 65.3% C 0.158 H 266.3°. Best body text is #000000 at 6.42:1 contrast (WCAG AA passes).

Color values

HEX	#638AF0
RGB	rgb(99, 138, 240)
HSL	hsl(223, 82%, 66%)
HSV	hsv(223, 59%, 94%)
CMYK	cmyk(58.8%, 42.5%, 0%, 5.9%)
CIE-LAB	lab(59.08, 16.63, -55.47)
CIE-LCH	lch(59.08, 57.91, 286.69°)
OKLab	oklab(65.31% -0.0101 -0.158)
OKLCH	oklch(65.31% 0.158 266.3)
XYZ	xyz(29.9569, 27.1184, 86.0769)
Luminance	0.2712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638AF0 #F0C963

analogous

#63D1F0 #638AF0 #8363F0

triadic

#638AF0 #F0638A #8AF063

tetradic

#638AF0 #F063D1 #F0C963 #63F083

square

#638AF0 #F063D1 #F0C963 #63F083

split-complementary

#638AF0 #F08363 #D1F063

monochromatic

#1344C6 #2B60EB #638AF0 #9BB4F5 #D3DEFB

Accessibility & contrast

On white

3.27

#638AF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.42

#638AF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638AF0

6.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638AF0	#FFFFFF	#000000	##000000
##638AF0	1.00	3.27	6.42	6.42
#FFFFFF	3.27	1.00	21.00	21.00
#000000	6.42	21.00	1.00	1.00
##000000	6.42	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C95F4

Deuteranopia (green-blind)

#4988EE

Tritanopia (blue-blind)

#00A1B1

Achromatopsia (no color)

#8E8E8E

Design tokens & code

CSS

--color: #638af0;
/* rgb */ color: rgb(99, 138, 240);
/* oklch */ color: oklch(65.3% 0.158 266.3);

Tailwind

colors: {
  custom: {
    50: '#9aabf5',
    500: '#638af0',
    950: '#000000',
  },
}

SCSS

$custom: #638af0;
$custom-light: #9aabf5;
$custom-dark: #000000;

JSON

{
  "hex": "#638af0",
  "rgb": {
    "r": 99,
    "g": 138,
    "b": 240
  },
  "hsl": {
    "h": 223.404,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.65305,
    "c": 0.15829,
    "h": 266.3
  },
  "luminance": 0.27121
}

Semantic roles & 50–950 ramp

primary

#638AF0

secondary

#EEE2C1

accent

#A307DF

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638AF0

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

Preview Lab → · Contrast checker → · Palette generator →