#665BB2#665BB2

#665BB2 is a mid, vivid blue. Relative luminance 0.135; OKLCH L 52.4% C 0.133 H 286.6°. Best body text is #FFFFFF at 5.67:1 contrast (WCAG AA passes).

Color values

HEX	#665BB2
RGB	rgb(102, 91, 178)
HSL	hsl(248, 36%, 53%)
HSV	hsv(248, 49%, 70%)
CMYK	cmyk(42.7%, 48.9%, 0%, 30.2%)
CIE-LAB	lab(43.54, 26.48, -45.00)
CIE-LCH	lch(43.54, 52.22, 300.48°)
OKLab	oklab(52.39% 0.0381 -0.1275)
OKLCH	oklch(52.39% 0.133 286.6)
XYZ	xyz(17.2542, 13.5207, 43.8115)
Luminance	0.1352 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB2 #A7B25B

analogous

#5B7BB2 #665BB2 #915BB2

triadic

#665BB2 #B2665B #5BB266

tetradic

#665BB2 #B25B7B #A7B25B #5BB291

square

#665BB2 #B25B7B #A7B25B #5BB291

split-complementary

#665BB2 #B2915B #7BB25B

monochromatic

#362F64 #4C428D #665BB2 #8D85C6 #B4AED9

Accessibility & contrast

On white

5.67

#665BB2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#665BB2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB2

5.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB2	#FFFFFF	#000000	##FFFFFF
##665BB2	1.00	5.67	3.70	5.67
#FFFFFF	5.67	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3869B5

Deuteranopia (green-blind)

#3664B0

Tritanopia (blue-blind)

#4F6D7E

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #665bb2;
/* rgb */ color: rgb(102, 91, 178);
/* oklch */ color: oklch(52.4% 0.133 286.6);

Tailwind

colors: {
  custom: {
    50: '#9689c9',
    500: '#665bb2',
    950: '#000000',
  },
}

SCSS

$custom: #665bb2;
$custom-light: #9689c9;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb2",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 178
  },
  "hsl": {
    "h": 247.586,
    "s": 36.1,
    "l": 52.745
  },
  "oklch": {
    "l": 0.52386,
    "c": 0.13313,
    "h": 286.6
  },
  "luminance": 0.13521
}

Semantic roles & 50–950 ramp

primary

#665BB2

secondary

#C2C7A2

accent

#CC5CBE

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #665BB2

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

Preview Lab → · Contrast checker → · Palette generator →