#665BF1#665BF1

#665BF1 is a mid, highly saturated blue. Relative luminance 0.167; OKLCH L 56.9% C 0.217 H 280.3°. Best body text is #FFFFFF at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#665BF1
RGB	rgb(102, 91, 241)
HSL	hsl(244, 84%, 65%)
HSV	hsv(244, 62%, 95%)
CMYK	cmyk(57.7%, 62.2%, 0%, 5.5%)
CIE-LAB	lab(47.82, 45.65, -74.18)
CIE-LCH	lch(47.82, 87.10, 301.61°)
OKLab	oklab(56.92% 0.0387 -0.2133)
OKLCH	oklch(56.92% 0.217 280.3)
XYZ	xyz(25.0928, 16.6561, 85.0947)
Luminance	0.1666 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BF1 #E6F15B

analogous

#5B9BF1 #665BF1 #B15BF1

triadic

#665BF1 #F1665B #5BF166

tetradic

#665BF1 #F15B9B #E6F15B #5BF1B1

square

#665BF1 #F15B9B #E6F15B #5BF1B1

split-complementary

#665BF1 #F1B15B #9BF15B

monochromatic

#1D10C1 #3123EC #665BF1 #9B93F6 #CFCCFB

Accessibility & contrast

On white

4.85

#665BF1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.33

#665BF1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BF1

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BF1	#FFFFFF	#000000	##FFFFFF
##665BF1	1.00	4.85	4.33	4.85
#FFFFFF	4.85	1.00	21.00	1.00
#000000	4.33	21.00	1.00	21.00
##FFFFFF	4.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0077F6

Deuteranopia (green-blind)

#006CEE

Tritanopia (blue-blind)

#05809E

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #665bf1;
/* rgb */ color: rgb(102, 91, 241);
/* oklch */ color: oklch(56.9% 0.217 280.3);

Tailwind

colors: {
  custom: {
    50: '#9e8af7',
    500: '#665bf1',
    950: '#000000',
  },
}

SCSS

$custom: #665bf1;
$custom-light: #9e8af7;
$custom-dark: #000000;

JSON

{
  "hex": "#665bf1",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 241
  },
  "hsl": {
    "h": 244.4,
    "s": 84.27,
    "l": 65.098
  },
  "oklch": {
    "l": 0.56919,
    "c": 0.2168,
    "h": 280.3
  },
  "luminance": 0.16658
}

Semantic roles & 50–950 ramp

primary

#665BF1

secondary

#EAEDBA

accent

#E105D1

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665BF1

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

Preview Lab → · Contrast checker → · Palette generator →