#665BB3#665BB3

#665BB3 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.4% C 0.135 H 286.5°. Best body text is #FFFFFF at 5.66:1 contrast (WCAG AA passes).

Color values

HEX	#665BB3
RGB	rgb(102, 91, 179)
HSL	hsl(248, 37%, 53%)
HSV	hsv(248, 49%, 70%)
CMYK	cmyk(43%, 49.2%, 0%, 29.8%)
CIE-LAB	lab(43.60, 26.78, -45.49)
CIE-LCH	lch(43.60, 52.79, 300.48°)
OKLab	oklab(52.45% 0.0382 -0.129)
OKLCH	oklch(52.45% 0.135 286.5)
XYZ	xyz(17.3549, 13.5610, 44.3422)
Luminance	0.1356 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB3 #A8B35B

analogous

#5B7CB3 #665BB3 #925BB3

triadic

#665BB3 #B3665B #5BB366

tetradic

#665BB3 #B35B7C #A8B35B #5BB392

square

#665BB3 #B35B7C #A8B35B #5BB392

split-complementary

#665BB3 #B3925B #7CB35B

monochromatic

#362F65 #4C428F #665BB3 #8D85C6 #B4AFDA

Accessibility & contrast

On white

5.66

#665BB3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.71

#665BB3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB3

5.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB3	#FFFFFF	#000000	##FFFFFF
##665BB3	1.00	5.66	3.71	5.66
#FFFFFF	5.66	1.00	21.00	1.00
#000000	3.71	21.00	1.00	21.00
##FFFFFF	5.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3769B6

Deuteranopia (green-blind)

#3565B1

Tritanopia (blue-blind)

#4F6D7E

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #665bb3;
/* rgb */ color: rgb(102, 91, 179);
/* oklch */ color: oklch(52.4% 0.135 286.5);

Tailwind

colors: {
  custom: {
    50: '#9689ca',
    500: '#665bb3',
    950: '#000000',
  },
}

SCSS

$custom: #665bb3;
$custom-light: #9689ca;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb3",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 179
  },
  "hsl": {
    "h": 247.5,
    "s": 36.667,
    "l": 52.941
  },
  "oklch": {
    "l": 0.5245,
    "c": 0.13454,
    "h": 286.5
  },
  "luminance": 0.13562
}

Semantic roles & 50–950 ramp

primary

#665BB3

secondary

#C3C8A2

accent

#CD5BBE

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #665BB3

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

Preview Lab → · Contrast checker → · Palette generator →