#637FD2#637FD2

#637FD2 is a mid, vivid blue. Relative luminance 0.225; OKLCH L 61.3% C 0.130 H 268.3°. Best body text is #000000 at 5.50:1 contrast (WCAG AA passes).

Color values

HEX	#637FD2
RGB	rgb(99, 127, 210)
HSL	hsl(225, 55%, 61%)
HSV	hsv(225, 53%, 82%)
CMYK	cmyk(52.9%, 39.5%, 0%, 17.6%)
CIE-LAB	lab(54.54, 13.59, -45.94)
CIE-LCH	lch(54.54, 47.90, 286.48°)
OKLab	oklab(61.28% -0.0038 -0.1301)
OKLCH	oklch(61.28% 0.13 268.3)
XYZ	xyz(24.3640, 22.4828, 64.0160)
Luminance	0.2248 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#637FD2 #D2B663

analogous

#63B6D2 #637FD2 #7E63D2

triadic

#637FD2 #D2637F #7FD263

tetradic

#637FD2 #D263B6 #D2B663 #63D27E

square

#637FD2 #D263B6 #D2B663 #63D27E

split-complementary

#637FD2 #D27E63 #B6D263

monochromatic

#2A4491 #375AC0 #637FD2 #92A6E0 #C2CDED

Accessibility & contrast

On white

3.82

#637FD2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.50

#637FD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #637FD2

5.50:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##637FD2	#FFFFFF	#000000	##000000
##637FD2	1.00	3.82	5.50	5.50
#FFFFFF	3.82	1.00	21.00	21.00
#000000	5.50	21.00	1.00	1.00
##000000	5.50	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D88D5

Deuteranopia (green-blind)

#517ED0

Tritanopia (blue-blind)

#2C919E

Achromatopsia (no color)

#828282

Design tokens & code

CSS

--color: #637fd2;
/* rgb */ color: rgb(99, 127, 210);
/* oklch */ color: oklch(61.3% 0.130 268.3);

Tailwind

colors: {
  custom: {
    50: '#96a3e0',
    500: '#637fd2',
    950: '#000000',
  },
}

SCSS

$custom: #637fd2;
$custom-light: #96a3e0;
$custom-dark: #000000;

JSON

{
  "hex": "#637fd2",
  "rgb": {
    "r": 99,
    "g": 127,
    "b": 210
  },
  "hsl": {
    "h": 224.865,
    "s": 55.224,
    "l": 60.588
  },
  "oklch": {
    "l": 0.61284,
    "c": 0.13019,
    "h": 268.3
  },
  "luminance": 0.22485
}

Semantic roles & 50–950 ramp

primary

#637FD2

secondary

#DED3B3

accent

#9A23C3

background

#F9FAFD

surface

#F2F3FB

border

#CCCDD4

text

#0E0F15

muted

#7E7F83

Preview Lab

Preview with #637FD2

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

Preview Lab → · Contrast checker → · Palette generator →