#637ADA#637ADA

#637ADA is a mid, vivid blue. Relative luminance 0.216; OKLCH L 60.7% C 0.148 H 271.3°. Best body text is #000000 at 5.33:1 contrast (WCAG AA passes).

Color values

HEX	#637ADA
RGB	rgb(99, 122, 218)
HSL	hsl(228, 62%, 62%)
HSV	hsv(228, 55%, 85%)
CMYK	cmyk(54.6%, 44%, 0%, 14.5%)
CIE-LAB	lab(53.63, 19.17, -51.88)
CIE-LCH	lch(53.63, 55.31, 290.27°)
OKLab	oklab(60.73% 0.0033 -0.1476)
OKLCH	oklch(60.73% 0.148 271.3)
XYZ	xyz(24.7559, 21.6319, 69.1869)
Luminance	0.2163 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637ADA #DAC363

analogous

#63B6DA #637ADA #8763DA

triadic

#637ADA #DA637A #7ADA63

tetradic

#637ADA #DA63B6 #DAC363 #63DA87

square

#637ADA #DA63B6 #DAC363 #63DA87

split-complementary

#637ADA #DA8763 #B6DA63

monochromatic

#253C9D #3250CE #637ADA #94A4E6 #C6CEF1

Accessibility & contrast

On white

3.94

#637ADA on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.33

#637ADA on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637ADA

5.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637ADA	#FFFFFF	#000000	##000000
##637ADA	1.00	3.94	5.33	5.33
#FFFFFF	3.94	1.00	21.00	21.00
#000000	5.33	21.00	1.00	1.00
##000000	5.33	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5086DE

Deuteranopia (green-blind)

#417BD8

Tritanopia (blue-blind)

#228F9F

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #637ada;
/* rgb */ color: rgb(99, 122, 218);
/* oklch */ color: oklch(60.7% 0.148 271.3);

Tailwind

colors: {
  custom: {
    50: '#97a0e6',
    500: '#637ada',
    950: '#000000',
  },
}

SCSS

$custom: #637ada;
$custom-light: #97a0e6;
$custom-dark: #000000;

JSON

{
  "hex": "#637ada",
  "rgb": {
    "r": 99,
    "g": 122,
    "b": 218
  },
  "hsl": {
    "h": 228.403,
    "s": 61.658,
    "l": 62.157
  },
  "oklch": {
    "l": 0.60733,
    "c": 0.14764,
    "h": 271.3
  },
  "luminance": 0.21634
}

Semantic roles & 50–950 ramp

primary

#637ADA

secondary

#E2DAB7

accent

#A81CC9

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0E16

muted

#7E7E84

Preview Lab

Preview with #637ADA

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

Preview Lab → · Contrast checker → · Palette generator →