#6366F1#6366F1

#6366F1 is a mid, highly saturated blue. Relative luminance 0.185; OKLCH L 58.5% C 0.204 H 277.1°. Best body text is #000000 at 4.70:1 contrast (WCAG AA passes).

Color values

HEX	#6366F1
RGB	rgb(99, 102, 241)
HSL	hsl(239, 84%, 67%)
HSV	hsv(239, 59%, 95%)
CMYK	cmyk(58.9%, 57.7%, 0%, 5.5%)
CIE-LAB	lab(50.10, 38.69, -70.49)
CIE-LCH	lch(50.10, 80.40, 298.76°)
OKLab	oklab(58.54% 0.0253 -0.2025)
OKLCH	oklch(58.54% 0.204 277.1)
XYZ	xyz(25.7690, 18.5043, 85.4158)
Luminance	0.1851 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366F1 #F1EE63

analogous

#63ADF1 #6366F1 #A763F1

triadic

#6366F1 #F16366 #66F163

tetradic

#6366F1 #F163AD #F1EE63 #63F1A7

square

#6366F1 #F163AD #F1EE63 #63F1A7

split-complementary

#6366F1 #F1A763 #ADF163

monochromatic

#1216C8 #2B2FEC #6366F1 #9B9DF6 #D3D4FB

Accessibility & contrast

On white

4.47

#6366F1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.70

#6366F1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366F1

4.70:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366F1	#FFFFFF	#000000	##000000
##6366F1	1.00	4.47	4.70	4.70
#FFFFFF	4.47	1.00	21.00	21.00
#000000	4.70	21.00	1.00	1.00
##000000	4.70	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007DF6

Deuteranopia (green-blind)

#0071EE

Tritanopia (blue-blind)

#0087A2

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #6366f1;
/* rgb */ color: rgb(99, 102, 241);
/* oklch */ color: oklch(58.5% 0.204 277.1);

Tailwind

colors: {
  custom: {
    50: '#9c91f7',
    500: '#6366f1',
    950: '#000000',
  },
}

SCSS

$custom: #6366f1;
$custom-light: #9c91f7;
$custom-dark: #000000;

JSON

{
  "hex": "#6366f1",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 241
  },
  "hsl": {
    "h": 238.732,
    "s": 83.529,
    "l": 66.667
  },
  "oklch": {
    "l": 0.5854,
    "c": 0.20405,
    "h": 277.1
  },
  "luminance": 0.18506
}

Semantic roles & 50–950 ramp

primary

#6366F1

secondary

#EFEEC1

accent

#DB06E0

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#0F0D17

muted

#7F7D85

Preview Lab

Preview with #6366F1

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

Preview Lab → · Contrast checker → · Palette generator →