#637CD5#637CD5

#637CD5 is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.8% C 0.138 H 270.1°. Best body text is #000000 at 5.37:1 contrast (WCAG AA passes).

Color values

HEX	#637CD5
RGB	rgb(99, 124, 213)
HSL	hsl(227, 58%, 61%)
HSV	hsv(227, 54%, 84%)
CMYK	cmyk(53.5%, 41.8%, 0%, 16.5%)
CIE-LAB	lab(53.89, 16.35, -48.66)
CIE-LCH	lch(53.89, 51.33, 288.58°)
OKLab	oklab(60.84% 0.0002 -0.1381)
OKLCH	oklch(60.84% 0.138 270.1)
XYZ	xyz(24.3595, 21.8703, 65.8756)
Luminance	0.2187 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CD5 #D5BC63

analogous

#63B5D5 #637CD5 #8363D5

triadic

#637CD5 #D5637C #7CD563

tetradic

#637CD5 #D563B5 #D5BC63 #63D583

square

#637CD5 #D563B5 #D5BC63 #63D583

split-complementary

#637CD5 #D58363 #B5D563

monochromatic

#284095 #3555C6 #637CD5 #93A4E2 #C3CDEF

Accessibility & contrast

On white

3.91

#637CD5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.37

#637CD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CD5

5.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CD5	#FFFFFF	#000000	##000000
##637CD5	1.00	3.91	5.37	5.37
#FFFFFF	3.91	1.00	21.00	21.00
#000000	5.37	21.00	1.00	1.00
##000000	5.37	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5786D8

Deuteranopia (green-blind)

#4A7CD3

Tritanopia (blue-blind)

#298F9E

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #637cd5;
/* rgb */ color: rgb(99, 124, 213);
/* oklch */ color: oklch(60.8% 0.138 270.1);

Tailwind

colors: {
  custom: {
    50: '#97a1e2',
    500: '#637cd5',
    950: '#000000',
  },
}

SCSS

$custom: #637cd5;
$custom-light: #97a1e2;
$custom-dark: #000000;

JSON

{
  "hex": "#637cd5",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 213
  },
  "hsl": {
    "h": 226.842,
    "s": 57.576,
    "l": 61.176
  },
  "oklch": {
    "l": 0.60839,
    "c": 0.13812,
    "h": 270.1
  },
  "luminance": 0.21872
}

Semantic roles & 50–950 ramp

primary

#637CD5

secondary

#DFD6B4

accent

#A120C5

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #637CD5

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

Preview Lab → · Contrast checker → · Palette generator →