#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
RGBrgb(99, 155, 253)
HSLhsl(218, 97%, 69%)
HSVhsv(218, 61%, 99%)
CMYKcmyk(60.9%, 38.7%, 0%, 0.8%)
CIE-LABlab(64.31, 10.82, -54.30)
CIE-LCHlch(64.31, 55.37, 281.26°)
OKLaboklab(69.56% -0.0248 -0.1543)
OKLCHoklch(69.56% 0.156 260.9)
XYZxyz(34.5903, 33.1841, 97.4918)
Luminance0.3319 (WCAG relative)
Temperaturecool
Familyblue

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
##639BFD1.002.757.647.64
#FFFFFF2.751.0021.0021.00
#0000007.6421.001.001.00
##0000007.6421.001.001.00

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 →

#639BFD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva