#639DFD#639DFD

#639DFD is a light, vivid blue. Relative luminance 0.339; OKLCH L 70.0% C 0.154 H 260.0°. Best body text is #000000 at 7.77:1 contrast (WCAG AA passes).

Color values

HEX	#639DFD
RGB	rgb(99, 157, 253)
HSL	hsl(217, 97%, 69%)
HSV	hsv(217, 61%, 99%)
CMYK	cmyk(60.9%, 37.9%, 0%, 0.8%)
CIE-LAB	lab(64.85, 9.65, -53.45)
CIE-LCH	lch(64.85, 54.31, 280.23°)
OKLab	oklab(69.98% -0.0269 -0.1518)
OKLCH	oklch(69.98% 0.154 260)
XYZ	xyz(34.9259, 33.8553, 97.6036)
Luminance	0.3386 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#639DFD #FDC363

analogous

#63EAFD #639DFD #7663FD

triadic

#639DFD #FD639D #9DFD63

tetradic

#639DFD #FD63EA #FDC363 #63FD76

square

#639DFD #FD63EA #FDC363 #63FD76

split-complementary

#639DFD #FD7663 #EAFD63

monochromatic

#0357E3 #2777FC #639DFD #9FC3FE #DCE9FF

Accessibility & contrast

On white

2.70

#639DFD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.77

#639DFD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #639DFD

7.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##639DFD	#FFFFFF	#000000	##000000
##639DFD	1.00	2.70	7.77	7.77
#FFFFFF	2.70	1.00	21.00	21.00
#000000	7.77	21.00	1.00	1.00
##000000	7.77	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#73A5FF

Deuteranopia (green-blind)

#5E97FB

Tritanopia (blue-blind)

#00B3C1

Achromatopsia (no color)

#9D9D9D

Design tokens & code

CSS

--color: #639dfd;
/* rgb */ color: rgb(99, 157, 253);
/* oklch */ color: oklch(70.0% 0.154 260.0);

Tailwind

colors: {
  custom: {
    50: '#9cb9fe',
    500: '#639dfd',
    950: '#000000',
  },
}

SCSS

$custom: #639dfd;
$custom-light: #9cb9fe;
$custom-dark: #000000;

JSON

{
  "hex": "#639dfd",
  "rgb": {
    "r": 99,
    "g": 157,
    "b": 253
  },
  "hsl": {
    "h": 217.403,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.69979,
    "c": 0.15418,
    "h": 260
  },
  "luminance": 0.33858
}

Semantic roles & 50–950 ramp

primary

#639DFD

secondary

#F4E3C7

accent

#8F00E6

background

#FAFBFF

surface

#F4F6FF

border

#CED0D7

text

#0F1118

muted

#7F8086

Preview Lab

Preview with #639DFD

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

Preview Lab → · Contrast checker → · Palette generator →