#6366FF#6366FF

#6366FF is a mid, highly saturated blue. Relative luminance 0.194; OKLCH L 59.6% C 0.222 H 276.5°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#6366FF
RGB	rgb(99, 102, 255)
HSL	hsl(239, 100%, 69%)
HSV	hsv(239, 61%, 100%)
CMYK	cmyk(61.2%, 60%, 0%, 0%)
CIE-LAB	lab(51.12, 43.14, -76.62)
CIE-LCH	lch(51.12, 87.93, 299.38°)
OKLab	oklab(59.61% 0.025 -0.2205)
OKLCH	oklch(59.61% 0.222 276.5)
XYZ	xyz(27.9411, 19.3732, 96.8553)
Luminance	0.1938 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366FF #FFFC63

analogous

#63B4FF #6366FF #AE63FF

triadic

#6366FF #FF6366 #66FF63

tetradic

#6366FF #FF63B4 #FFFC63 #63FFAE

square

#6366FF #FF63B4 #FFFC63 #63FFAE

split-complementary

#6366FF #FFAE63 #B4FF63

monochromatic

#0004E8 #262AFF #6366FF #A0A2FF #DDDEFF

Accessibility & contrast

On white

4.31

#6366FF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#6366FF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6366FF

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366FF	#FFFFFF	#000000	##000000
##6366FF	1.00	4.31	4.88	4.88
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0081FF

Deuteranopia (green-blind)

#0073FC

Tritanopia (blue-blind)

#008CA9

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #6366ff;
/* rgb */ color: rgb(99, 102, 255);
/* oklch */ color: oklch(59.6% 0.222 276.5);

Tailwind

colors: {
  custom: {
    50: '#9e92ff',
    500: '#6366ff',
    950: '#000000',
  },
}

SCSS

$custom: #6366ff;
$custom-light: #9e92ff;
$custom-dark: #000000;

JSON

{
  "hex": "#6366ff",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 255
  },
  "hsl": {
    "h": 238.846,
    "s": 100,
    "l": 69.412
  },
  "oklch": {
    "l": 0.59612,
    "c": 0.22193,
    "h": 276.5
  },
  "luminance": 0.19375
}

Semantic roles & 50–950 ramp

primary

#6366FF

secondary

#F5F5C8

accent

#E100E6

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #6366FF

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

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