#637CD6#637CD6

#637CD6 is a mid, vivid blue. Relative luminance 0.219; OKLCH L 60.9% C 0.140 H 270.2°. Best body text is #000000 at 5.38:1 contrast (WCAG AA passes).

Color values

HEX	#637CD6
RGB	rgb(99, 124, 214)
HSL	hsl(227, 58%, 61%)
HSV	hsv(227, 54%, 84%)
CMYK	cmyk(53.7%, 42.1%, 0%, 16.1%)
CIE-LAB	lab(53.94, 16.67, -49.13)
CIE-LCH	lch(53.94, 51.89, 288.74°)
OKLab	oklab(60.9% 0.0004 -0.1395)
OKLCH	oklch(60.9% 0.14 270.2)
XYZ	xyz(24.4869, 21.9213, 66.5462)
Luminance	0.2192 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637CD6 #D6BD63

analogous

#63B6D6 #637CD6 #8463D6

triadic

#637CD6 #D6637C #7CD663

tetradic

#637CD6 #D663B6 #D6BD63 #63D684

square

#637CD6 #D663B6 #D6BD63 #63D684

split-complementary

#637CD6 #D68463 #B6D663

monochromatic

#284097 #3454C7 #637CD6 #93A5E3 #C4CDEF

Accessibility & contrast

On white

3.90

#637CD6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.38

#637CD6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637CD6

5.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637CD6	#FFFFFF	#000000	##000000
##637CD6	1.00	3.90	5.38	5.38
#FFFFFF	3.90	1.00	21.00	21.00
#000000	5.38	21.00	1.00	1.00
##000000	5.38	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5686D9

Deuteranopia (green-blind)

#497CD4

Tritanopia (blue-blind)

#28909E

Achromatopsia (no color)

#818181

Design tokens & code

CSS

--color: #637cd6;
/* rgb */ color: rgb(99, 124, 214);
/* oklch */ color: oklch(60.9% 0.140 270.2);

Tailwind

colors: {
  custom: {
    50: '#97a1e3',
    500: '#637cd6',
    950: '#000000',
  },
}

SCSS

$custom: #637cd6;
$custom-light: #97a1e3;
$custom-dark: #000000;

JSON

{
  "hex": "#637cd6",
  "rgb": {
    "r": 99,
    "g": 124,
    "b": 214
  },
  "hsl": {
    "h": 226.957,
    "s": 58.376,
    "l": 61.373
  },
  "oklch": {
    "l": 0.60898,
    "c": 0.13952,
    "h": 270.2
  },
  "luminance": 0.21923
}

Semantic roles & 50–950 ramp

primary

#637CD6

secondary

#E0D7B5

accent

#A220C6

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0E15

muted

#7E7E83

Preview Lab

Preview with #637CD6

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

Preview Lab → · Contrast checker → · Palette generator →