#639BFD#639BFD

#639BFD is a light, vivid blue. Relative luminance 0.332; OKLCH L 69.6% C 0.156 H 260.9°. Best body text is #000000 at 7.64:1 contrast (WCAG AA passes).

Color values

HEX	#639BFD
RGB	rgb(99, 155, 253)
HSL	hsl(218, 97%, 69%)
HSV	hsv(218, 61%, 99%)
CMYK	cmyk(60.9%, 38.7%, 0%, 0.8%)
CIE-LAB	lab(64.31, 10.82, -54.30)
CIE-LCH	lch(64.31, 55.37, 281.26°)
OKLab	oklab(69.56% -0.0248 -0.1543)
OKLCH	oklch(69.56% 0.156 260.9)
XYZ	xyz(34.5903, 33.1841, 97.4918)
Luminance	0.3319 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#639BFD #FDC563

analogous

#63E8FD #639BFD #7863FD

triadic

#639BFD #FD639B #9BFD63

tetradic

#639BFD #FD63E8 #FDC563 #63FD78

square

#639BFD #FD63E8 #FDC563 #63FD78

split-complementary

#639BFD #FD7863 #E8FD63

monochromatic

#0354E3 #2774FC #639BFD #9FC2FE #DCE8FF

Accessibility & contrast

On white

2.75

#639BFD on #FFFFFF

AA ✗AA large ✗AAA ✗

On black

7.64

#639BFD on #000000

AA ✓AA large ✓AAA ✓

Best text color

#000000 on #639BFD

7.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##639BFD	#FFFFFF	#000000	##000000
##639BFD	1.00	2.75	7.64	7.64
#FFFFFF	2.75	1.00	21.00	21.00
#000000	7.64	21.00	1.00	1.00
##000000	7.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#70A4FF

Deuteranopia (green-blind)

#5B95FB

Tritanopia (blue-blind)

#00B1C0

Achromatopsia (no color)

#9C9C9C

Design tokens & code

CSS

--color: #639bfd;
/* rgb */ color: rgb(99, 155, 253);
/* oklch */ color: oklch(69.6% 0.156 260.9);

Tailwind

colors: {
  custom: {
    50: '#9cb8fe',
    500: '#639bfd',
    950: '#000000',
  },
}

SCSS

$custom: #639bfd;
$custom-light: #9cb8fe;
$custom-dark: #000000;

JSON

{
  "hex": "#639bfd",
  "rgb": {
    "r": 99,
    "g": 155,
    "b": 253
  },
  "hsl": {
    "h": 218.182,
    "s": 97.468,
    "l": 69.02
  },
  "oklch": {
    "l": 0.69562,
    "c": 0.15633,
    "h": 260.9
  },
  "luminance": 0.33187
}

Semantic roles & 50–950 ramp

primary

#639BFD

secondary

#F4E4C7

accent

#9200E6

background

#FAFBFF

surface

#F4F6FF

border

#CED0D7

text

#0F1118

muted

#7F8086

Preview Lab

Preview with #639BFD

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

Preview Lab → · Contrast checker → · Palette generator →