#636FEF#636FEF

#636FEF is a mid, vivid blue. Relative luminance 0.203; OKLCH L 60.0% C 0.190 H 275.1°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#636FEF
RGB	rgb(99, 111, 239)
HSL	hsl(235, 81%, 66%)
HSV	hsv(235, 59%, 94%)
CMYK	cmyk(58.6%, 53.6%, 0%, 6.3%)
CIE-LAB	lab(52.12, 32.63, -66.10)
CIE-LCH	lch(52.12, 73.71, 296.27°)
OKLab	oklab(60% 0.0168 -0.1895)
OKLCH	oklch(60% 0.19 275.1)
XYZ	xyz(26.4049, 20.2515, 84.1621)
Luminance	0.2025 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636FEF #EFE363

analogous

#63B5EF #636FEF #9D63EF

triadic

#636FEF #EF636F #6FEF63

tetradic

#636FEF #EF63B5 #EFE363 #63EF9D

square

#636FEF #EF63B5 #EFE363 #63EF9D

split-complementary

#636FEF #EF9D63 #B5EF63

monochromatic

#1423C4 #2B3CE9 #636FEF #9BA2F5 #D2D5FA

Accessibility & contrast

On white

4.16

#636FEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#636FEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636FEF

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636FEF	#FFFFFF	#000000	##000000
##636FEF	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1982F3

Deuteranopia (green-blind)

#0076EC

Tritanopia (blue-blind)

#008DA4

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #636fef;
/* rgb */ color: rgb(99, 111, 239);
/* oklch */ color: oklch(60.0% 0.190 275.1);

Tailwind

colors: {
  custom: {
    50: '#9b98f5',
    500: '#636fef',
    950: '#000000',
  },
}

SCSS

$custom: #636fef;
$custom-light: #9b98f5;
$custom-dark: #000000;

JSON

{
  "hex": "#636fef",
  "rgb": {
    "r": 99,
    "g": 111,
    "b": 239
  },
  "hsl": {
    "h": 234.857,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.6,
    "c": 0.19024,
    "h": 275.1
  },
  "luminance": 0.20254
}

Semantic roles & 50–950 ramp

primary

#636FEF

secondary

#EEEAC0

accent

#CB08DE

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #636FEF

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

Preview Lab → · Contrast checker → · Palette generator →