#636FDD#636FDD

#636FDD is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.8% C 0.166 H 275.4°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#636FDD
RGB	rgb(99, 111, 221)
HSL	hsl(234, 64%, 63%)
HSV	hsv(234, 55%, 87%)
CMYK	cmyk(55.2%, 49.8%, 0%, 13.3%)
CIE-LAB	lab(50.97, 26.84, -57.85)
CIE-LCH	lch(50.97, 63.77, 294.89°)
OKLab	oklab(58.77% 0.0156 -0.1652)
OKLCH	oklch(58.77% 0.166 275.4)
XYZ	xyz(23.8770, 19.2403, 70.8481)
Luminance	0.1924 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FDD #DDD163

analogous

#63ACDD #636FDD #9463DD

triadic

#636FDD #DD636F #6FDD63

tetradic

#636FDD #DD63AC #DDD163 #63DD94

square

#636FDD #DD63AC #DDD163 #63DD94

split-complementary

#636FDD #DD9463 #ACDD63

monochromatic

#2330A2 #3141D2 #636FDD #959DE8 #C7CCF3

Accessibility & contrast

On white

4.33

#636FDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#636FDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FDD

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FDD	#FFFFFF	#000000	##000000
##636FDD	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#377FE1

Deuteranopia (green-blind)

#2474DB

Tritanopia (blue-blind)

#21889C

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #636fdd;
/* rgb */ color: rgb(99, 111, 221);
/* oklch */ color: oklch(58.8% 0.166 275.4);

Tailwind

colors: {
  custom: {
    50: '#9898e8',
    500: '#636fdd',
    950: '#000000',
  },
}

SCSS

$custom: #636fdd;
$custom-light: #9898e8;
$custom-dark: #000000;

JSON

{
  "hex": "#636fdd",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 221
  },
  "hsl": {
    "h": 234.098,
    "s": 64.211,
    "l": 62.745
  },
  "oklch": {
    "l": 0.58765,
    "c": 0.16596,
    "h": 275.4
  },
  "luminance": 0.19242
}

Semantic roles & 50–950 ramp

primary

#636FDD

secondary

#E4E0B8

accent

#BA19CC

background

#F9F9FE

surface

#F2F2FD

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #636FDD

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

Preview Lab → · Contrast checker → · Palette generator →