#636FAC#636FAC

#636FAC is a mid, moderate blue. Relative luminance 0.170; OKLCH L 55.8% C 0.096 H 274.4°. Best body text is #FFFFFF at 4.77:1 contrast (WCAG AA passes).

Color values

HEX	#636FAC
RGB	rgb(99, 111, 172)
HSL	hsl(230, 31%, 53%)
HSV	hsv(230, 42%, 67%)
CMYK	cmyk(42.4%, 35.5%, 0%, 32.5%)
CIE-LAB	lab(48.26, 11.60, -34.03)
CIE-LCH	lch(48.26, 35.95, 288.83°)
OKLab	oklab(55.82% 0.0074 -0.0955)
OKLCH	oklch(55.82% 0.096 274.4)
XYZ	xyz(18.2742, 16.9992, 41.3400)
Luminance	0.1700 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FAC #ACA063

analogous

#6393AC #636FAC #7B63AC

triadic

#636FAC #AC636F #6FAC63

tetradic

#636FAC #AC6393 #ACA063 #63AC7B

square

#636FAC #AC6393 #ACA063 #63AC7B

split-complementary

#636FAC #AC7B63 #93AC63

monochromatic

#343B61 #495389 #636FAC #8B94C1 #B3B9D7

Accessibility & contrast

On white

4.77

#636FAC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.40

#636FAC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #636FAC

4.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FAC	#FFFFFF	#000000	##FFFFFF
##636FAC	1.00	4.77	4.40	4.77
#FFFFFF	4.77	1.00	21.00	1.00
#000000	4.40	21.00	1.00	21.00
##FFFFFF	4.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5A76AE

Deuteranopia (green-blind)

#5470AB

Tritanopia (blue-blind)

#4B7B85

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #636fac;
/* rgb */ color: rgb(99, 111, 172);
/* oklch */ color: oklch(55.8% 0.096 274.4);

Tailwind

colors: {
  custom: {
    50: '#9298c5',
    500: '#636fac',
    950: '#000000',
  },
}

SCSS

$custom: #636fac;
$custom-light: #9298c5;
$custom-dark: #000000;

JSON

{
  "hex": "#636fac",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 172
  },
  "hsl": {
    "h": 230.137,
    "s": 30.544,
    "l": 53.137
  },
  "oklch": {
    "l": 0.5582,
    "c": 0.0958,
    "h": 274.4
  },
  "luminance": 0.17
}

Semantic roles & 50–950 ramp

primary

#636FAC

secondary

#C5C0A6

accent

#B661C7

background

#F9F9FC

surface

#F1F2F8

border

#CBCCD1

text

#0D0D13

muted

#7E7E82

Preview Lab

Preview with #636FAC

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

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