#636CF3#636CF3

#636CF3 is a mid, vivid blue. Relative luminance 0.198; OKLCH L 59.7% C 0.199 H 275.7°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#636CF3
RGB	rgb(99, 108, 243)
HSL	hsl(236, 86%, 67%)
HSV	hsv(236, 59%, 95%)
CMYK	cmyk(59.3%, 55.6%, 0%, 4.7%)
CIE-LAB	lab(51.66, 35.73, -69.07)
CIE-LCH	lch(51.66, 77.76, 297.35°)
OKLab	oklab(59.74% 0.0198 -0.1983)
OKLCH	oklch(59.74% 0.199 275.7)
XYZ	xyz(26.6806, 19.8468, 87.2015)
Luminance	0.1985 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#636CF3 #F3EA63

analogous

#63B4F3 #636CF3 #A263F3

triadic

#636CF3 #F3636C #6CF363

tetradic

#636CF3 #F363B4 #F3EA63 #63F3A2

square

#636CF3 #F363B4 #F3EA63 #63F3A2

split-complementary

#636CF3 #F3A263 #B4F363

monochromatic

#101BCC #2A36EF #636CF3 #9CA2F7 #D5D7FC

Accessibility & contrast

On white

4.23

#636CF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#636CF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #636CF3

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##636CF3	#FFFFFF	#000000	##000000
##636CF3	1.00	4.23	4.97	4.97
#FFFFFF	4.23	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0081F8

Deuteranopia (green-blind)

#0075F0

Tritanopia (blue-blind)

#008CA5

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #636cf3;
/* rgb */ color: rgb(99, 108, 243);
/* oklch */ color: oklch(59.7% 0.199 275.7);

Tailwind

colors: {
  custom: {
    50: '#9c96f8',
    500: '#636cf3',
    950: '#000000',
  },
}

SCSS

$custom: #636cf3;
$custom-light: #9c96f8;
$custom-dark: #000000;

JSON

{
  "hex": "#636cf3",
  "rgb": {
    "r": 99,
    "g": 108,
    "b": 243
  },
  "hsl": {
    "h": 236.25,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.59744,
    "c": 0.19925,
    "h": 275.7
  },
  "luminance": 0.19849
}

Semantic roles & 50–950 ramp

primary

#636CF3

secondary

#F0EDC2

accent

#D403E2

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #636CF3

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

Preview Lab → · Contrast checker → · Palette generator →