#6366D2#6366D2

#6366D2 is a mid, vivid blue. Relative luminance 0.168; OKLCH L 56.3% C 0.163 H 278.6°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#6366D2
RGB	rgb(99, 102, 210)
HSL	hsl(238, 55%, 61%)
HSV	hsv(238, 53%, 82%)
CMYK	cmyk(52.9%, 51.4%, 0%, 17.6%)
CIE-LAB	lab(48.02, 28.84, -56.35)
CIE-LCH	lch(48.02, 63.30, 297.11°)
OKLab	oklab(56.32% 0.0243 -0.1609)
OKLCH	oklch(56.32% 0.163 278.6)
XYZ	xyz(21.5262, 16.8072, 63.0701)
Luminance	0.1681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D2 #D2CF63

analogous

#639ED2 #6366D2 #9763D2

triadic

#6366D2 #D26366 #66D263

tetradic

#6366D2 #D2639E #D2CF63 #63D297

square

#6366D2 #D2639E #D2CF63 #63D297

split-complementary

#6366D2 #D29763 #9ED263

monochromatic

#2A2D91 #373BC0 #6366D2 #9295E0 #C2C3ED

Accessibility & contrast

On white

4.81

#6366D2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.36

#6366D2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D2

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D2	#FFFFFF	#000000	##FFFFFF
##6366D2	1.00	4.81	4.36	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.36	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E76D6

Deuteranopia (green-blind)

#1E6ED0

Tritanopia (blue-blind)

#317E92

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #6366d2;
/* rgb */ color: rgb(99, 102, 210);
/* oklch */ color: oklch(56.3% 0.163 278.6);

Tailwind

colors: {
  custom: {
    50: '#9791e0',
    500: '#6366d2',
    950: '#000000',
  },
}

SCSS

$custom: #6366d2;
$custom-light: #9791e0;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d2",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 210
  },
  "hsl": {
    "h": 238.378,
    "s": 55.224,
    "l": 60.588
  },
  "oklch": {
    "l": 0.56322,
    "c": 0.16272,
    "h": 278.6
  },
  "luminance": 0.16809
}

Semantic roles & 50–950 ramp

primary

#6366D2

secondary

#DEDCB3

accent

#BE23C3

background

#F9F8FD

surface

#F2F0FB

border

#CCCBD4

text

#0E0C15

muted

#7E7D83

Preview Lab

Preview with #6366D2

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

Preview Lab → · Contrast checker → · Palette generator →