#665BF5#665BF5

#665BF5 is a mid, highly saturated blue. Relative luminance 0.169; OKLCH L 57.2% C 0.222 H 280.0°. Best body text is #FFFFFF at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#665BF5
RGB	rgb(102, 91, 245)
HSL	hsl(244, 89%, 66%)
HSV	hsv(244, 63%, 96%)
CMYK	cmyk(58.4%, 62.9%, 0%, 3.9%)
CIE-LAB	lab(48.13, 46.88, -75.92)
CIE-LCH	lch(48.13, 89.23, 301.70°)
OKLab	oklab(57.24% 0.0384 -0.2184)
OKLCH	oklch(57.24% 0.222 280)
XYZ	xyz(25.6968, 16.8977, 88.2760)
Luminance	0.1690 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BF5 #EAF55B

analogous

#5B9DF5 #665BF5 #B35BF5

triadic

#665BF5 #F5665B #5BF566

tetradic

#665BF5 #F55B9D #EAF55B #5BF5B3

square

#665BF5 #F55B9D #EAF55B #5BF5B3

split-complementary

#665BF5 #F5B35B #9DF55B

monochromatic

#1A0CC9 #3021F1 #665BF5 #9C95F9 #D2CEFC

Accessibility & contrast

On white

4.79

#665BF5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.38

#665BF5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BF5

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BF5	#FFFFFF	#000000	##FFFFFF
##665BF5	1.00	4.79	4.38	4.79
#FFFFFF	4.79	1.00	21.00	1.00
#000000	4.38	21.00	1.00	21.00
##FFFFFF	4.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0078FA

Deuteranopia (green-blind)

#006CF2

Tritanopia (blue-blind)

#0082A0

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #665bf5;
/* rgb */ color: rgb(102, 91, 245);
/* oklch */ color: oklch(57.2% 0.222 280.0);

Tailwind

colors: {
  custom: {
    50: '#9f8afa',
    500: '#665bf5',
    950: '#000000',
  },
}

SCSS

$custom: #665bf5;
$custom-light: #9f8afa;
$custom-dark: #000000;

JSON

{
  "hex": "#665bf5",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 245
  },
  "hsl": {
    "h": 244.286,
    "s": 88.506,
    "l": 65.882
  },
  "oklch": {
    "l": 0.57239,
    "c": 0.22178,
    "h": 280
  },
  "luminance": 0.169
}

Semantic roles & 50–950 ramp

primary

#665BF5

secondary

#ECEFBC

accent

#E500D5

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665BF5

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

Preview Lab → · Contrast checker → · Palette generator →