#665FF4#665FF4

#665FF4 is a mid, highly saturated blue. Relative luminance 0.175; OKLCH L 57.8% C 0.216 H 279.3°. Best body text is #FFFFFF at 4.66:1 contrast (WCAG AA passes).

Color values

HEX	#665FF4
RGB	rgb(102, 95, 244)
HSL	hsl(243, 87%, 66%)
HSV	hsv(243, 61%, 96%)
CMYK	cmyk(58.2%, 61.1%, 0%, 4.3%)
CIE-LAB	lab(48.93, 44.26, -74.06)
CIE-LCH	lch(48.93, 86.27, 300.87°)
OKLab	oklab(57.8% 0.035 -0.2129)
OKLCH	oklch(57.8% 0.216 279.3)
XYZ	xyz(25.8957, 17.5390, 87.5912)
Luminance	0.1754 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665FF4 #EDF45F

analogous

#5FA3F4 #665FF4 #B15FF4

triadic

#665FF4 #F4665F #5FF466

tetradic

#665FF4 #F45FA3 #EDF45F #5FF4B1

square

#665FF4 #F45FA3 #EDF45F #5FF4B1

split-complementary

#665FF4 #F4B15F #A3F45F

monochromatic

#170ECB #2F26F0 #665FF4 #9D98F8 #D4D2FC

Accessibility & contrast

On white

4.66

#665FF4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.51

#665FF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #665FF4

4.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665FF4	#FFFFFF	#000000	##FFFFFF
##665FF4	1.00	4.66	4.51	4.66
#FFFFFF	4.66	1.00	21.00	1.00
#000000	4.51	21.00	1.00	21.00
##FFFFFF	4.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#007AF9

Deuteranopia (green-blind)

#006EF1

Tritanopia (blue-blind)

#0084A1

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #665ff4;
/* rgb */ color: rgb(102, 95, 244);
/* oklch */ color: oklch(57.8% 0.216 279.3);

Tailwind

colors: {
  custom: {
    50: '#9e8df9',
    500: '#665ff4',
    950: '#000000',
  },
}

SCSS

$custom: #665ff4;
$custom-light: #9e8df9;
$custom-dark: #000000;

JSON

{
  "hex": "#665ff4",
  "rgb": {
    "r": 102,
    "g": 95,
    "b": 244
  },
  "hsl": {
    "h": 242.819,
    "s": 87.135,
    "l": 66.471
  },
  "oklch": {
    "l": 0.57801,
    "c": 0.21579,
    "h": 279.3
  },
  "luminance": 0.17541
}

Semantic roles & 50–950 ramp

primary

#665FF4

secondary

#EDF0BF

accent

#E402D9

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665FF4

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

Preview Lab → · Contrast checker → · Palette generator →