#636BF1#636BF1

#636BF1 is a mid, vivid blue. Relative luminance 0.195; OKLCH L 59.4% C 0.198 H 276.0°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#636BF1
RGB	rgb(99, 107, 241)
HSL	hsl(237, 84%, 67%)
HSV	hsv(237, 59%, 95%)
CMYK	cmyk(58.9%, 55.6%, 0%, 5.5%)
CIE-LAB	lab(51.29, 35.69, -68.56)
CIE-LCH	lch(51.29, 77.30, 297.50°)
OKLab	oklab(59.42% 0.0207 -0.1968)
OKLCH	oklch(59.42% 0.198 276)
XYZ	xyz(26.2753, 19.5169, 85.5846)
Luminance	0.1952 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636BF1 #F1E963

analogous

#63B2F1 #636BF1 #A263F1

triadic

#636BF1 #F1636B #6BF163

tetradic

#636BF1 #F163B2 #F1E963 #63F1A2

square

#636BF1 #F163B2 #F1E963 #63F1A2

split-complementary

#636BF1 #F1A263 #B2F163

monochromatic

#121CC8 #2B36EC #636BF1 #9BA0F6 #D3D6FB

Accessibility & contrast

On white

4.28

#636BF1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#636BF1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636BF1

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636BF1	#FFFFFF	#000000	##000000
##636BF1	1.00	4.28	4.90	4.90
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0080F6

Deuteranopia (green-blind)

#0074EE

Tritanopia (blue-blind)

#008BA4

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #636bf1;
/* rgb */ color: rgb(99, 107, 241);
/* oklch */ color: oklch(59.4% 0.198 276.0);

Tailwind

colors: {
  custom: {
    50: '#9c95f6',
    500: '#636bf1',
    950: '#000000',
  },
}

SCSS

$custom: #636bf1;
$custom-light: #9c95f6;
$custom-dark: #000000;

JSON

{
  "hex": "#636bf1",
  "rgb": {
    "r": 99,
    "g": 107,
    "b": 241
  },
  "hsl": {
    "h": 236.62,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.5942,
    "c": 0.19787,
    "h": 276
  },
  "luminance": 0.19519
}

Semantic roles & 50–950 ramp

primary

#636BF1

secondary

#EFECC1

accent

#D406E0

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #636BF1

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

Preview Lab → · Contrast checker → · Palette generator →