#638CD1#638CD1

#638CD1 is a light, moderate blue. Relative luminance 0.260; OKLCH L 64.0% C 0.114 H 260.4°. Best body text is #000000 at 6.20:1 contrast (WCAG AA passes).

Color values

HEX	#638CD1
RGB	rgb(99, 140, 209)
HSL	hsl(218, 54%, 60%)
HSV	hsv(218, 53%, 82%)
CMYK	cmyk(52.6%, 33%, 0%, 18%)
CIE-LAB	lab(58.05, 5.53, -39.83)
CIE-LCH	lch(58.05, 40.21, 277.90°)
OKLab	oklab(63.99% -0.019 -0.1122)
OKLCH	oklch(63.99% 0.114 260.4)
XYZ	xyz(26.0284, 26.0103, 63.9581)
Luminance	0.2601 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CD1 #D1A863

analogous

#63C3D1 #638CD1 #7163D1

triadic

#638CD1 #D1638C #8CD163

tetradic

#638CD1 #D163C3 #D1A863 #63D171

square

#638CD1 #D163C3 #D1A863 #63D171

split-complementary

#638CD1 #D17163 #C3D163

monochromatic

#2A508F #386ABF #638CD1 #92AFDF #C2D2ED

Accessibility & contrast

On white

3.39

#638CD1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.20

#638CD1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CD1

6.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CD1	#FFFFFF	#000000	##000000
##638CD1	1.00	3.39	6.20	6.20
#FFFFFF	3.39	1.00	21.00	21.00
#000000	6.20	21.00	1.00	1.00
##000000	6.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7191D4

Deuteranopia (green-blind)

#6487D0

Tritanopia (blue-blind)

#299BA5

Achromatopsia (no color)

#8B8B8B

Design tokens & code

CSS

--color: #638cd1;
/* rgb */ color: rgb(99, 140, 209);
/* oklch */ color: oklch(64.0% 0.114 260.4);

Tailwind

colors: {
  custom: {
    50: '#96addf',
    500: '#638cd1',
    950: '#000000',
  },
}

SCSS

$custom: #638cd1;
$custom-light: #96addf;
$custom-dark: #000000;

JSON

{
  "hex": "#638cd1",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 209
  },
  "hsl": {
    "h": 217.636,
    "s": 54.455,
    "l": 60.392
  },
  "oklch": {
    "l": 0.63988,
    "c": 0.11383,
    "h": 260.4
  },
  "luminance": 0.26012
}

Semantic roles & 50–950 ramp

primary

#638CD1

secondary

#DDCDB3

accent

#8724C2

background

#F9FAFD

surface

#F2F4FB

border

#CCCED4

text

#0E1015

muted

#7E7F83

Preview Lab

Preview with #638CD1

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

Preview Lab → · Contrast checker → · Palette generator →