#665BB0#665BB0

#665BB0 is a mid, vivid blue. Relative luminance 0.134; OKLCH L 52.3% C 0.130 H 286.9°. Best body text is #FFFFFF at 5.69:1 contrast (WCAG AA passes).

Color values

HEX	#665BB0
RGB	rgb(102, 91, 176)
HSL	hsl(248, 35%, 52%)
HSV	hsv(248, 48%, 69%)
CMYK	cmyk(42%, 48.3%, 0%, 31%)
CIE-LAB	lab(43.42, 25.89, -44.01)
CIE-LCH	lch(43.42, 51.07, 300.47°)
OKLab	oklab(52.26% 0.0379 -0.1247)
OKLCH	oklch(52.26% 0.13 286.9)
XYZ	xyz(17.0548, 13.4409, 42.7616)
Luminance	0.1344 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB0 #A5B05B

analogous

#5B7AB0 #665BB0 #915BB0

triadic

#665BB0 #B0665B #5BB066

tetradic

#665BB0 #B05B7A #A5B05B #5BB091

square

#665BB0 #B05B7A #A5B05B #5BB091

split-complementary

#665BB0 #B0915B #7AB05B

monochromatic

#362F62 #4C438B #665BB0 #8D84C4 #B3AED8

Accessibility & contrast

On white

5.69

#665BB0 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.69

#665BB0 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB0

5.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB0	#FFFFFF	#000000	##FFFFFF
##665BB0	1.00	5.69	3.69	5.69
#FFFFFF	5.69	1.00	21.00	1.00
#000000	3.69	21.00	1.00	21.00
##FFFFFF	5.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3969B3

Deuteranopia (green-blind)

#3864AE

Tritanopia (blue-blind)

#506C7D

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #665bb0;
/* rgb */ color: rgb(102, 91, 176);
/* oklch */ color: oklch(52.3% 0.130 286.9);

Tailwind

colors: {
  custom: {
    50: '#9689c8',
    500: '#665bb0',
    950: '#000000',
  },
}

SCSS

$custom: #665bb0;
$custom-light: #9689c8;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb0",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 176
  },
  "hsl": {
    "h": 247.765,
    "s": 34.979,
    "l": 52.353
  },
  "oklch": {
    "l": 0.5226,
    "c": 0.1303,
    "h": 286.9
  },
  "luminance": 0.13442
}

Semantic roles & 50–950 ramp

primary

#665BB0

secondary

#C1C6A1

accent

#CB5DBD

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #665BB0

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

Preview Lab → · Contrast checker → · Palette generator →