#6366EF#6366EF

#6366EF is a mid, highly saturated blue. Relative luminance 0.184; OKLCH L 58.4% C 0.201 H 277.2°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#6366EF
RGB	rgb(99, 102, 239)
HSL	hsl(239, 81%, 66%)
HSV	hsv(239, 59%, 94%)
CMYK	cmyk(58.6%, 57.3%, 0%, 6.3%)
CIE-LAB	lab(49.96, 38.05, -69.60)
CIE-LCH	lch(49.96, 79.32, 298.67°)
OKLab	oklab(58.39% 0.0253 -0.1999)
OKLCH	oklch(58.39% 0.201 277.2)
XYZ	xyz(25.4719, 18.3855, 83.8511)
Luminance	0.1839 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366EF #EFEC63

analogous

#63ACEF #6366EF #A663EF

triadic

#6366EF #EF6366 #66EF63

tetradic

#6366EF #EF63AC #EFEC63 #63EFA6

square

#6366EF #EF63AC #EFEC63 #63EFA6

split-complementary

#6366EF #EFA663 #ACEF63

monochromatic

#1418C4 #2B30E9 #6366EF #9B9CF5 #D2D3FA

Accessibility & contrast

On white

4.49

#6366EF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#6366EF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366EF

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366EF	#FFFFFF	#000000	##000000
##6366EF	1.00	4.49	4.68	4.68
#FFFFFF	4.49	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007DF4

Deuteranopia (green-blind)

#0071EC

Tritanopia (blue-blind)

#0087A1

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #6366ef;
/* rgb */ color: rgb(99, 102, 239);
/* oklch */ color: oklch(58.4% 0.201 277.2);

Tailwind

colors: {
  custom: {
    50: '#9c91f5',
    500: '#6366ef',
    950: '#000000',
  },
}

SCSS

$custom: #6366ef;
$custom-light: #9c91f5;
$custom-dark: #000000;

JSON

{
  "hex": "#6366ef",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 239
  },
  "hsl": {
    "h": 238.714,
    "s": 81.395,
    "l": 66.275
  },
  "oklch": {
    "l": 0.58391,
    "c": 0.20146,
    "h": 277.2
  },
  "luminance": 0.18387
}

Semantic roles & 50–950 ramp

primary

#6366EF

secondary

#EEEDC0

accent

#D908DE

background

#FAF8FF

surface

#F4F0FE

border

#CECBD6

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6366EF

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

Preview Lab → · Contrast checker → · Palette generator →