#638BF0#638BF0

#638BF0 is a light, vivid blue. Relative luminance 0.274; OKLCH L 65.5% C 0.157 H 265.9°. Best body text is #000000 at 6.48:1 contrast (WCAG AA passes).

Color values

HEX	#638BF0
RGB	rgb(99, 139, 240)
HSL	hsl(223, 82%, 66%)
HSV	hsv(223, 59%, 94%)
CMYK	cmyk(58.8%, 42.1%, 0%, 5.9%)
CIE-LAB	lab(59.35, 16.03, -55.05)
CIE-LCH	lch(59.35, 57.34, 286.24°)
OKLab	oklab(65.51% -0.0111 -0.1567)
OKLCH	oklch(65.51% 0.157 265.9)
XYZ	xyz(30.1010, 27.4067, 86.1249)
Luminance	0.2741 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638BF0 #F0C863

analogous

#63D1F0 #638BF0 #8263F0

triadic

#638BF0 #F0638B #8BF063

tetradic

#638BF0 #F063D1 #F0C863 #63F082

square

#638BF0 #F063D1 #F0C863 #63F082

split-complementary

#638BF0 #F08263 #D1F063

monochromatic

#1346C6 #2B61EB #638BF0 #9BB5F5 #D3DEFB

Accessibility & contrast

On white

3.24

#638BF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.48

#638BF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638BF0

6.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638BF0	#FFFFFF	#000000	##000000
##638BF0	1.00	3.24	6.48	6.48
#FFFFFF	3.24	1.00	21.00	21.00
#000000	6.48	21.00	1.00	1.00
##000000	6.48	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E96F4

Deuteranopia (green-blind)

#4A89EE

Tritanopia (blue-blind)

#00A2B2

Achromatopsia (no color)

#8F8F8F

Design tokens & code

CSS

--color: #638bf0;
/* rgb */ color: rgb(99, 139, 240);
/* oklch */ color: oklch(65.5% 0.157 265.9);

Tailwind

colors: {
  custom: {
    50: '#9aacf5',
    500: '#638bf0',
    950: '#000000',
  },
}

SCSS

$custom: #638bf0;
$custom-light: #9aacf5;
$custom-dark: #000000;

JSON

{
  "hex": "#638bf0",
  "rgb": {
    "r": 99,
    "g": 139,
    "b": 240
  },
  "hsl": {
    "h": 222.979,
    "s": 82.456,
    "l": 66.471
  },
  "oklch": {
    "l": 0.65509,
    "c": 0.15711,
    "h": 265.9
  },
  "luminance": 0.27409
}

Semantic roles & 50–950 ramp

primary

#638BF0

secondary

#EEE1C1

accent

#A207DF

background

#FAFAFF

surface

#F3F4FE

border

#CDCED6

text

#0F1017

muted

#7F7F85

Preview Lab

Preview with #638BF0

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

Preview Lab → · Contrast checker → · Palette generator →