#665EF9#665EF9

#665EF9 is a mid, highly saturated blue. Relative luminance 0.177; OKLCH L 58.0% C 0.223 H 279.1°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#665EF9
RGB	rgb(102, 94, 249)
HSL	hsl(243, 93%, 67%)
HSV	hsv(243, 62%, 98%)
CMYK	cmyk(59%, 62.2%, 0%, 2.4%)
CIE-LAB	lab(49.09, 46.39, -76.59)
CIE-LCH	lch(49.09, 89.54, 301.20°)
OKLab	oklab(58.04% 0.0355 -0.2204)
OKLCH	oklch(58.04% 0.223 279.1)
XYZ	xyz(26.5756, 17.6678, 91.6140)
Luminance	0.1767 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665EF9 #F1F95E

analogous

#5EA3F9 #665EF9 #B45EF9

triadic

#665EF9 #F9665E #5EF966

tetradic

#665EF9 #F95EA3 #F1F95E #5EF9B4

square

#665EF9 #F95EA3 #F1F95E #5EF9B4

split-complementary

#665EF9 #F9B45E #A3F95E

monochromatic

#1208D5 #2E23F7 #665EF9 #9E99FB #D6D4FD

Accessibility & contrast

On white

4.63

#665EF9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.53

#665EF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #665EF9

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665EF9	#FFFFFF	#000000	##FFFFFF
##665EF9	1.00	4.63	4.53	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.53	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007BFE

Deuteranopia (green-blind)

#006EF6

Tritanopia (blue-blind)

#0085A3

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #665ef9;
/* rgb */ color: rgb(102, 94, 249);
/* oklch */ color: oklch(58.0% 0.223 279.1);

Tailwind

colors: {
  custom: {
    50: '#9f8cfc',
    500: '#665ef9',
    950: '#000000',
  },
}

SCSS

$custom: #665ef9;
$custom-light: #9f8cfc;
$custom-dark: #000000;

JSON

{
  "hex": "#665ef9",
  "rgb": {
    "r": 102,
    "g": 94,
    "b": 249
  },
  "hsl": {
    "h": 243.097,
    "s": 92.814,
    "l": 67.255
  },
  "oklch": {
    "l": 0.58035,
    "c": 0.22322,
    "h": 279.1
  },
  "luminance": 0.1767
}

Semantic roles & 50–950 ramp

primary

#665EF9

secondary

#EFF2C1

accent

#E600DA

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C18

muted

#7F7D86

Preview Lab

Preview with #665EF9

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

Preview Lab → · Contrast checker → · Palette generator →