#665BF4#665BF4

#665BF4 is a mid, highly saturated blue. Relative luminance 0.168; OKLCH L 57.2% C 0.221 H 280.0°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#665BF4
RGB	rgb(102, 91, 244)
HSL	hsl(244, 87%, 66%)
HSV	hsv(244, 63%, 96%)
CMYK	cmyk(58.2%, 62.7%, 0%, 4.3%)
CIE-LAB	lab(48.05, 46.58, -75.49)
CIE-LCH	lch(48.05, 88.70, 301.67°)
OKLab	oklab(57.16% 0.0384 -0.2172)
OKLCH	oklch(57.16% 0.221 280)
XYZ	xyz(25.5446, 16.8368, 87.4742)
Luminance	0.1684 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BF4 #E9F45B

analogous

#5B9CF4 #665BF4 #B35BF4

triadic

#665BF4 #F4665B #5BF466

tetradic

#665BF4 #F45B9C #E9F45B #5BF4B3

square

#665BF4 #F45B9C #E9F45B #5BF4B3

split-complementary

#665BF4 #F4B35B #9CF45B

monochromatic

#1B0DC7 #3022F0 #665BF4 #9C94F8 #D1CEFC

Accessibility & contrast

On white

4.81

#665BF4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#665BF4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BF4

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BF4	#FFFFFF	#000000	##FFFFFF
##665BF4	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0078F9

Deuteranopia (green-blind)

#006CF1

Tritanopia (blue-blind)

#00819F

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #665bf4;
/* rgb */ color: rgb(102, 91, 244);
/* oklch */ color: oklch(57.2% 0.221 280.0);

Tailwind

colors: {
  custom: {
    50: '#9f8af9',
    500: '#665bf4',
    950: '#000000',
  },
}

SCSS

$custom: #665bf4;
$custom-light: #9f8af9;
$custom-dark: #000000;

JSON

{
  "hex": "#665bf4",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 244
  },
  "hsl": {
    "h": 244.314,
    "s": 87.429,
    "l": 65.686
  },
  "oklch": {
    "l": 0.57159,
    "c": 0.22053,
    "h": 280
  },
  "luminance": 0.16839
}

Semantic roles & 50–950 ramp

primary

#665BF4

secondary

#EBEFBC

accent

#E402D4

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665BF4

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

Preview Lab → · Contrast checker → · Palette generator →