#638CD4#638CD4

#638CD4 is a light, moderate blue. Relative luminance 0.262; OKLCH L 64.1% C 0.118 H 261.1°. Best body text is #000000 at 6.23:1 contrast (WCAG AA passes).

Color values

HEX	#638CD4
RGB	rgb(99, 140, 212)
HSL	hsl(218, 57%, 61%)
HSV	hsv(218, 53%, 83%)
CMYK	cmyk(53.3%, 34%, 0%, 16.9%)
CIE-LAB	lab(58.19, 6.46, -41.29)
CIE-LCH	lch(58.19, 41.80, 278.90°)
OKLab	oklab(64.15% -0.0182 -0.1165)
OKLCH	oklch(64.15% 0.118 261.1)
XYZ	xyz(26.4033, 26.1603, 65.9327)
Luminance	0.2616 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#638CD4 #D4AB63

analogous

#63C4D4 #638CD4 #7263D4

triadic

#638CD4 #D4638C #8CD463

tetradic

#638CD4 #D463C4 #D4AB63 #63D472

square

#638CD4 #D463C4 #D4AB63 #63D472

split-complementary

#638CD4 #D47263 #C4D463

monochromatic

#295094 #3669C4 #638CD4 #93AFE1 #C3D3EE

Accessibility & contrast

On white

3.37

#638CD4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

6.23

#638CD4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #638CD4

6.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##638CD4	#FFFFFF	#000000	##000000
##638CD4	1.00	3.37	6.23	6.23
#FFFFFF	3.37	1.00	21.00	21.00
#000000	6.23	21.00	1.00	1.00
##000000	6.23	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6F92D7

Deuteranopia (green-blind)

#6287D2

Tritanopia (blue-blind)

#259CA6

Achromatopsia (no color)

#8C8C8C

Design tokens & code

CSS

--color: #638cd4;
/* rgb */ color: rgb(99, 140, 212);
/* oklch */ color: oklch(64.1% 0.118 261.1);

Tailwind

colors: {
  custom: {
    50: '#96ade1',
    500: '#638cd4',
    950: '#000000',
  },
}

SCSS

$custom: #638cd4;
$custom-light: #96ade1;
$custom-dark: #000000;

JSON

{
  "hex": "#638cd4",
  "rgb": {
    "r": 99,
    "g": 140,
    "b": 212
  },
  "hsl": {
    "h": 218.23,
    "s": 56.784,
    "l": 60.98
  },
  "oklch": {
    "l": 0.64145,
    "c": 0.1179,
    "h": 261.1
  },
  "luminance": 0.26162
}

Semantic roles & 50–950 ramp

primary

#638CD4

secondary

#DFCFB4

accent

#8921C4

background

#F9FAFD

surface

#F2F4FB

border

#CCCED4

text

#0E1015

muted

#7E7F83

Preview Lab

Preview with #638CD4

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

Preview Lab → · Contrast checker → · Palette generator →