#665FF3#665FF3

#665FF3 is a mid, highly saturated blue. Relative luminance 0.175; OKLCH L 57.7% C 0.215 H 279.4°. Best body text is #FFFFFF at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#665FF3
RGB	rgb(102, 95, 243)
HSL	hsl(243, 86%, 66%)
HSV	hsv(243, 61%, 95%)
CMYK	cmyk(58%, 60.9%, 0%, 4.7%)
CIE-LAB	lab(48.86, 43.95, -73.62)
CIE-LCH	lch(48.86, 85.74, 300.84°)
OKLab	oklab(57.72% 0.035 -0.2117)
OKLCH	oklch(57.72% 0.215 279.4)
XYZ	xyz(25.7442, 17.4784, 86.7937)
Luminance	0.1748 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665FF3 #ECF35F

analogous

#5FA2F3 #665FF3 #B05FF3

triadic

#665FF3 #F3665F #5FF366

tetradic

#665FF3 #F35FA2 #ECF35F #5FF3B0

square

#665FF3 #F35FA2 #ECF35F #5FF3B0

split-complementary

#665FF3 #F3B05F #A2F35F

monochromatic

#180FC9 #3026EF #665FF3 #9C98F7 #D3D1FC

Accessibility & contrast

On white

4.67

#665FF3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.50

#665FF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #665FF3

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665FF3	#FFFFFF	#000000	##FFFFFF
##665FF3	1.00	4.67	4.50	4.67
#FFFFFF	4.67	1.00	21.00	1.00
#000000	4.50	21.00	1.00	21.00
##FFFFFF	4.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007AF8

Deuteranopia (green-blind)

#006EF0

Tritanopia (blue-blind)

#0083A0

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #665ff3;
/* rgb */ color: rgb(102, 95, 243);
/* oklch */ color: oklch(57.7% 0.215 279.4);

Tailwind

colors: {
  custom: {
    50: '#9e8df8',
    500: '#665ff3',
    950: '#000000',
  },
}

SCSS

$custom: #665ff3;
$custom-light: #9e8df8;
$custom-dark: #000000;

JSON

{
  "hex": "#665ff3",
  "rgb": {
    "r": 102,
    "g": 95,
    "b": 243
  },
  "hsl": {
    "h": 242.838,
    "s": 86.047,
    "l": 66.275
  },
  "oklch": {
    "l": 0.57722,
    "c": 0.21454,
    "h": 279.4
  },
  "luminance": 0.1748
}

Semantic roles & 50–950 ramp

primary

#665FF3

secondary

#EDEFBF

accent

#E303D8

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665FF3

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

Preview Lab → · Contrast checker → · Palette generator →