#6366BC#6366BC

#6366BC is a mid, vivid blue. Relative luminance 0.158; OKLCH L 54.9% C 0.132 H 279.6°. Best body text is #FFFFFF at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#6366BC
RGB	rgb(99, 102, 188)
HSL	hsl(238, 40%, 56%)
HSV	hsv(238, 47%, 74%)
CMYK	cmyk(47.3%, 45.7%, 0%, 26.3%)
CIE-LAB	lab(46.69, 21.98, -45.81)
CIE-LCH	lch(46.69, 50.82, 295.63°)
OKLab	oklab(54.9% 0.022 -0.13)
OKLCH	oklch(54.9% 0.132 279.6)
XYZ	xyz(18.9713, 15.7852, 49.6144)
Luminance	0.1579 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366BC #BCB963

analogous

#6393BC #6366BC #8D63BC

triadic

#6366BC #BC6366 #66BC63

tetradic

#6366BC #BC6393 #BCB963 #63BC8D

square

#6366BC #BC6393 #BCB963 #63BC8D

split-complementary

#6366BC #BC8D63 #93BC63

monochromatic

#313473 #44479E #6366BC #8E90CE #B9BAE1

Accessibility & contrast

On white

5.05

#6366BC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.16

#6366BC on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366BC

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366BC	#FFFFFF	#000000	##FFFFFF
##6366BC	1.00	5.05	4.16	5.05
#FFFFFF	5.05	1.00	21.00	1.00
#000000	4.16	21.00	1.00	21.00
##FFFFFF	5.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4372BF

Deuteranopia (green-blind)

#3C6BBA

Tritanopia (blue-blind)

#437888

Achromatopsia (no color)

#6F6F6F

Design tokens & code

CSS

--color: #6366bc;
/* rgb */ color: rgb(99, 102, 188);
/* oklch */ color: oklch(54.9% 0.132 279.6);

Tailwind

colors: {
  custom: {
    50: '#9491d1',
    500: '#6366bc',
    950: '#000000',
  },
}

SCSS

$custom: #6366bc;
$custom-light: #9491d1;
$custom-dark: #000000;

JSON

{
  "hex": "#6366bc",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 188
  },
  "hsl": {
    "h": 237.978,
    "s": 39.91,
    "l": 56.275
  },
  "oklch": {
    "l": 0.54896,
    "c": 0.13181,
    "h": 279.6
  },
  "luminance": 0.15786
}

Semantic roles & 50–950 ramp

primary

#6366BC

secondary

#D0CEAB

accent

#CC58D0

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0C14

muted

#7E7D82

Preview Lab

Preview with #6366BC

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

Preview Lab → · Contrast checker → · Palette generator →