#638CDC#638CDC

#638CDC is a light, vivid blue. Relative luminance 0.266; OKLCH L 64.6% C 0.129 H 262.7°. Best body text is #000000 at 6.32:1 contrast (WCAG AA passes).

Color values

HEX	#638CDC
RGB	rgb(99, 140, 220)
HSL	hsl(220, 63%, 63%)
HSV	hsv(220, 55%, 86%)
CMYK	cmyk(55%, 36.4%, 0%, 13.7%)
CIE-LAB	lab(58.58, 8.99, -45.16)
CIE-LCH	lch(58.58, 46.04, 281.26°)
OKLab	oklab(64.58% -0.0163 -0.1277)
OKLCH	oklch(64.58% 0.129 262.7)
XYZ	xyz(27.4375, 26.5740, 71.3797)
Luminance	0.2658 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CDC #DCB363

analogous

#63C9DC #638CDC #7663DC

triadic

#638CDC #DC638C #8CDC63

tetradic

#638CDC #DC63C9 #DCB363 #63DC76

square

#638CDC #DC63C9 #DCB363 #63DC76

split-complementary

#638CDC #DC7663 #C9DC63

monochromatic

#244EA1 #3167D1 #638CDC #95B1E7 #C7D6F2

Accessibility & contrast

On white

3.33

#638CDC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.32

#638CDC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CDC

6.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CDC	#FFFFFF	#000000	##000000
##638CDC	1.00	3.33	6.32	6.32
#FFFFFF	3.33	1.00	21.00	21.00
#000000	6.32	21.00	1.00	1.00
##000000	6.32	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6B93DF

Deuteranopia (green-blind)

#5D88DA

Tritanopia (blue-blind)

#179EAA

Achromatopsia (no color)

#8D8D8D

Design tokens & code

CSS

--color: #638cdc;
/* rgb */ color: rgb(99, 140, 220);
/* oklch */ color: oklch(64.6% 0.129 262.7);

Tailwind

colors: {
  custom: {
    50: '#97ade7',
    500: '#638cdc',
    950: '#000000',
  },
}

SCSS

$custom: #638cdc;
$custom-light: #97ade7;
$custom-dark: #000000;

JSON

{
  "hex": "#638cdc",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 220
  },
  "hsl": {
    "h": 219.669,
    "s": 63.351,
    "l": 62.549
  },
  "oklch": {
    "l": 0.64575,
    "c": 0.12879,
    "h": 262.7
  },
  "luminance": 0.26576
}

Semantic roles & 50–950 ramp

primary

#638CDC

secondary

#E3D4B7

accent

#8F1ACB

background

#F9FAFE

surface

#F2F4FC

border

#CCCED5

text

#0E1016

muted

#7E7F84

Preview Lab

Preview with #638CDC

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

Preview Lab → · Contrast checker → · Palette generator →