#665EF3#665EF3

#665EF3 is a mid, highly saturated blue. Relative luminance 0.173; OKLCH L 57.6% C 0.216 H 279.6°. Best body text is #FFFFFF at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#665EF3
RGB	rgb(102, 94, 243)
HSL	hsl(243, 86%, 66%)
HSV	hsv(243, 61%, 95%)
CMYK	cmyk(58%, 61.3%, 0%, 4.7%)
CIE-LAB	lab(48.64, 44.53, -73.98)
CIE-LCH	lch(48.64, 86.35, 301.05°)
OKLab	oklab(57.56% 0.0359 -0.2127)
OKLCH	oklch(57.56% 0.216 279.6)
XYZ	xyz(25.6547, 17.2994, 86.7639)
Luminance	0.1730 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665EF3 #EBF35E

analogous

#5EA0F3 #665EF3 #B05EF3

triadic

#665EF3 #F3665E #5EF366

tetradic

#665EF3 #F35EA0 #EBF35E #5EF3B0

square

#665EF3 #F35EA0 #EBF35E #5EF3B0

split-complementary

#665EF3 #F3B05E #A0F35E

monochromatic

#190FC8 #3025EF #665EF3 #9C97F7 #D2D0FB

Accessibility & contrast

On white

4.71

#665EF3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.46

#665EF3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665EF3

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665EF3	#FFFFFF	#000000	##FFFFFF
##665EF3	1.00	4.71	4.46	4.71
#FFFFFF	4.71	1.00	21.00	1.00
#000000	4.46	21.00	1.00	21.00
##FFFFFF	4.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0079F8

Deuteranopia (green-blind)

#006EF0

Tritanopia (blue-blind)

#0083A0

Achromatopsia (no color)

#737373

Design tokens & code

CSS

--color: #665ef3;
/* rgb */ color: rgb(102, 94, 243);
/* oklch */ color: oklch(57.6% 0.216 279.6);

Tailwind

colors: {
  custom: {
    50: '#9e8cf8',
    500: '#665ef3',
    950: '#000000',
  },
}

SCSS

$custom: #665ef3;
$custom-light: #9e8cf8;
$custom-dark: #000000;

JSON

{
  "hex": "#665ef3",
  "rgb": {
    "r": 102,
    "g": 94,
    "b": 243
  },
  "hsl": {
    "h": 243.221,
    "s": 86.127,
    "l": 66.078
  },
  "oklch": {
    "l": 0.5756,
    "c": 0.21573,
    "h": 279.6
  },
  "luminance": 0.17301
}

Semantic roles & 50–950 ramp

primary

#665EF3

secondary

#ECEFBE

accent

#E303D7

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665EF3

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

Preview Lab → · Contrast checker → · Palette generator →