#6366D9#6366D9

#6366D9 is a mid, vivid blue. Relative luminance 0.172; OKLCH L 56.8% C 0.172 H 278.3°. Best body text is #FFFFFF at 4.74:1 contrast (WCAG AA passes).

Color values

HEX	#6366D9
RGB	rgb(99, 102, 217)
HSL	hsl(238, 61%, 62%)
HSV	hsv(238, 54%, 85%)
CMYK	cmyk(54.4%, 53%, 0%, 14.9%)
CIE-LAB	lab(48.47, 31.06, -59.61)
CIE-LCH	lch(48.47, 67.21, 297.52°)
OKLab	oklab(56.8% 0.0248 -0.1705)
OKLCH	oklch(56.8% 0.172 278.3)
XYZ	xyz(22.4174, 17.1637, 67.7638)
Luminance	0.1716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366D9 #D9D663

analogous

#63A1D9 #6366D9 #9B63D9

triadic

#6366D9 #D96366 #66D963

tetradic

#6366D9 #D963A1 #D9D663 #63D99B

square

#6366D9 #D963A1 #D9D663 #63D99B

split-complementary

#6366D9 #D99B63 #A1D963

monochromatic

#26299C #3236CD #6366D9 #9496E5 #C5C7F1

Accessibility & contrast

On white

4.74

#6366D9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.43

#6366D9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366D9

4.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366D9	#FFFFFF	#000000	##FFFFFF
##6366D9	1.00	4.74	4.43	4.74
#FFFFFF	4.74	1.00	21.00	1.00
#000000	4.43	21.00	1.00	21.00
##FFFFFF	4.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2378DD

Deuteranopia (green-blind)

#076ED7

Tritanopia (blue-blind)

#298096

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #6366d9;
/* rgb */ color: rgb(99, 102, 217);
/* oklch */ color: oklch(56.8% 0.172 278.3);

Tailwind

colors: {
  custom: {
    50: '#9891e5',
    500: '#6366d9',
    950: '#000000',
  },
}

SCSS

$custom: #6366d9;
$custom-light: #9891e5;
$custom-dark: #000000;

JSON

{
  "hex": "#6366d9",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 217
  },
  "hsl": {
    "h": 238.475,
    "s": 60.825,
    "l": 61.961
  },
  "oklch": {
    "l": 0.56803,
    "c": 0.17228,
    "h": 278.3
  },
  "luminance": 0.17165
}

Semantic roles & 50–950 ramp

primary

#6366D9

secondary

#E2E1B6

accent

#C41DC9

background

#F9F8FE

surface

#F2F0FC

border

#CCCBD5

text

#0F0C16

muted

#7E7D84

Preview Lab

Preview with #6366D9

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

Preview Lab → · Contrast checker → · Palette generator →