#6366AA#6366AA

#6366AA is a mid, moderate blue. Relative luminance 0.151; OKLCH L 53.8% C 0.106 H 280.3°. Best body text is #FFFFFF at 5.23:1 contrast (WCAG AA passes).

Color values

HEX	#6366AA
RGB	rgb(99, 102, 170)
HSL	hsl(237, 29%, 53%)
HSV	hsv(237, 42%, 67%)
CMYK	cmyk(41.8%, 40%, 0%, 33.3%)
CIE-LAB	lab(45.71, 16.54, -36.87)
CIE-LCH	lch(45.71, 40.41, 294.16°)
OKLab	oklab(53.83% 0.0189 -0.1038)
OKLCH	oklch(53.83% 0.106 280.3)
XYZ	xyz(17.1505, 15.0569, 40.0250)
Luminance	0.1506 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6366AA #AAA763

analogous

#6389AA #6366AA #8363AA

triadic

#6366AA #AA6366 #66AA63

tetradic

#6366AA #AA6389 #AAA763 #63AA83

square

#6366AA #AA6389 #AAA763 #63AA83

split-complementary

#6366AA #AA8363 #89AA63

monochromatic

#34365F #494C87 #6366AA #8B8DC0 #B2B4D5

Accessibility & contrast

On white

5.23

#6366AA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.01

#6366AA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #6366AA

5.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6366AA	#FFFFFF	#000000	##FFFFFF
##6366AA	1.00	5.23	4.01	5.23
#FFFFFF	5.23	1.00	21.00	1.00
#000000	4.01	21.00	1.00	21.00
##FFFFFF	5.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E6FAD

Deuteranopia (green-blind)

#4A6AA8

Tritanopia (blue-blind)

#4D7480

Achromatopsia (no color)

#6C6C6C

Design tokens & code

CSS

--color: #6366aa;
/* rgb */ color: rgb(99, 102, 170);
/* oklch */ color: oklch(53.8% 0.106 280.3);

Tailwind

colors: {
  custom: {
    50: '#9391c3',
    500: '#6366aa',
    950: '#000000',
  },
}

SCSS

$custom: #6366aa;
$custom-light: #9391c3;
$custom-dark: #000000;

JSON

{
  "hex": "#6366aa",
  "rgb": {
    "r": 99,
    "g": 102,
    "b": 170
  },
  "hsl": {
    "h": 237.465,
    "s": 29.461,
    "l": 52.745
  },
  "oklch": {
    "l": 0.53831,
    "c": 0.10551,
    "h": 280.3
  },
  "luminance": 0.15058
}

Semantic roles & 50–950 ramp

primary

#6366AA

secondary

#C4C2A5

accent

#C262C6

background

#F9F8FC

surface

#F1F0F8

border

#CBCBD1

text

#0D0C12

muted

#7E7D81

Preview Lab

Preview with #6366AA

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

Preview Lab → · Contrast checker → · Palette generator →