#6663F3#6663F3

#6663F3 is a mid, highly saturated blue. Relative luminance 0.182; OKLCH L 58.4% C 0.210 H 278.6°. Best body text is #000000 at 4.64:1 contrast (WCAG AA passes).

Color values

HEX	#6663F3
RGB	rgb(102, 99, 243)
HSL	hsl(241, 86%, 67%)
HSV	hsv(241, 59%, 95%)
CMYK	cmyk(58%, 59.3%, 0%, 4.7%)
CIE-LAB	lab(49.76, 41.60, -72.15)
CIE-LCH	lch(49.76, 83.29, 299.97°)
OKLab	oklab(58.39% 0.0314 -0.2073)
OKLCH	oklch(58.39% 0.21 278.6)
XYZ	xyz(26.1138, 18.2177, 86.9169)
Luminance	0.1822 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#6663F3 #F0F363

analogous

#63A8F3 #6663F3 #AE63F3

triadic

#6663F3 #F36663 #63F366

tetradic

#6663F3 #F363A8 #F0F363 #63F3AE

square

#6663F3 #F363A8 #F0F363 #63F3AE

split-complementary

#6663F3 #F3AE63 #A8F363

monochromatic

#1410CC #2E2AEF #6663F3 #9E9CF7 #D5D5FC

Accessibility & contrast

On white

4.52

#6663F3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.64

#6663F3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #6663F3

4.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##6663F3	#FFFFFF	#000000	##000000
##6663F3	1.00	4.52	4.64	4.64
#FFFFFF	4.52	1.00	21.00	21.00
#000000	4.64	21.00	1.00	1.00
##000000	4.64	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007CF8

Deuteranopia (green-blind)

#0071F0

Tritanopia (blue-blind)

#0086A2

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #6663f3;
/* rgb */ color: rgb(102, 99, 243);
/* oklch */ color: oklch(58.4% 0.210 278.6);

Tailwind

colors: {
  custom: {
    50: '#9e90f8',
    500: '#6663f3',
    950: '#000000',
  },
}

SCSS

$custom: #6663f3;
$custom-light: #9e90f8;
$custom-dark: #000000;

JSON

{
  "hex": "#6663f3",
  "rgb": {
    "r": 102,
    "g": 99,
    "b": 243
  },
  "hsl": {
    "h": 241.25,
    "s": 85.714,
    "l": 67.059
  },
  "oklch": {
    "l": 0.58385,
    "c": 0.20969,
    "h": 278.6
  },
  "luminance": 0.1822
}

Semantic roles & 50–950 ramp

primary

#6663F3

secondary

#EFF0C2

accent

#E203DE

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #6663F3

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

Preview Lab → · Contrast checker → · Palette generator →