#665BF0#665BF0

#665BF0 is a mid, highly saturated blue. Relative luminance 0.166; OKLCH L 56.8% C 0.216 H 280.4°. Best body text is #FFFFFF at 4.86:1 contrast (WCAG AA passes).

Color values

HEX	#665BF0
RGB	rgb(102, 91, 240)
HSL	hsl(244, 83%, 65%)
HSV	hsv(244, 62%, 94%)
CMYK	cmyk(57.5%, 62.1%, 0%, 5.9%)
CIE-LAB	lab(47.75, 45.34, -73.75)
CIE-LCH	lch(47.75, 86.57, 301.59°)
OKLab	oklab(56.84% 0.0387 -0.212)
OKLCH	oklch(56.84% 0.216 280.4)
XYZ	xyz(24.9438, 16.5965, 84.3102)
Luminance	0.1660 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BF0 #E5F05B

analogous

#5B9AF0 #665BF0 #B15BF0

triadic

#665BF0 #F0665B #5BF066

tetradic

#665BF0 #F05B9A #E5F05B #5BF0B1

square

#665BF0 #F05B9A #E5F05B #5BF0B1

split-complementary

#665BF0 #F0B15B #9AF05B

monochromatic

#1E11BF #3223EB #665BF0 #9A93F5 #CFCBFA

Accessibility & contrast

On white

4.86

#665BF0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.32

#665BF0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BF0

4.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BF0	#FFFFFF	#000000	##FFFFFF
##665BF0	1.00	4.86	4.32	4.86
#FFFFFF	4.86	1.00	21.00	1.00
#000000	4.32	21.00	1.00	21.00
##FFFFFF	4.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0077F5

Deuteranopia (green-blind)

#006CED

Tritanopia (blue-blind)

#0A809D

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #665bf0;
/* rgb */ color: rgb(102, 91, 240);
/* oklch */ color: oklch(56.8% 0.216 280.4);

Tailwind

colors: {
  custom: {
    50: '#9e8af6',
    500: '#665bf0',
    950: '#000000',
  },
}

SCSS

$custom: #665bf0;
$custom-light: #9e8af6;
$custom-dark: #000000;

JSON

{
  "hex": "#665bf0",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 240
  },
  "hsl": {
    "h": 244.43,
    "s": 83.24,
    "l": 64.902
  },
  "oklch": {
    "l": 0.5684,
    "c": 0.21556,
    "h": 280.4
  },
  "luminance": 0.16598
}

Semantic roles & 50–950 ramp

primary

#665BF0

secondary

#E9EDBA

accent

#E006D0

background

#FAF8FF

surface

#F4F0FF

border

#CECBD7

text

#100C17

muted

#7F7D85

Preview Lab

Preview with #665BF0

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

Preview Lab → · Contrast checker → · Palette generator →