#665BB4#665BB4

#665BB4 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.5% C 0.136 H 286.4°. Best body text is #FFFFFF at 5.64:1 contrast (WCAG AA passes).

Color values

HEX	#665BB4
RGB	rgb(102, 91, 180)
HSL	hsl(247, 37%, 53%)
HSV	hsv(247, 49%, 71%)
CMYK	cmyk(43.3%, 49.4%, 0%, 29.4%)
CIE-LAB	lab(43.66, 27.07, -45.98)
CIE-LCH	lch(43.66, 53.36, 300.49°)
OKLab	oklab(52.51% 0.0383 -0.1304)
OKLCH	oklch(52.51% 0.136 286.4)
XYZ	xyz(17.4564, 13.6016, 44.8768)
Luminance	0.1360 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB4 #A9B45B

analogous

#5B7CB4 #665BB4 #925BB4

triadic

#665BB4 #B4665B #5BB466

tetradic

#665BB4 #B45B7C #A9B45B #5BB492

square

#665BB4 #B45B7C #A9B45B #5BB492

split-complementary

#665BB4 #B4925B #7CB45B

monochromatic

#352F66 #4B4290 #665BB4 #8D85C7 #B4AFDA

Accessibility & contrast

On white

5.64

#665BB4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.72

#665BB4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB4

5.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB4	#FFFFFF	#000000	##FFFFFF
##665BB4	1.00	5.64	3.72	5.64
#FFFFFF	5.64	1.00	21.00	1.00
#000000	3.72	21.00	1.00	21.00
##FFFFFF	5.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#366AB7

Deuteranopia (green-blind)

#3465B2

Tritanopia (blue-blind)

#4F6D7F

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #665bb4;
/* rgb */ color: rgb(102, 91, 180);
/* oklch */ color: oklch(52.5% 0.136 286.4);

Tailwind

colors: {
  custom: {
    50: '#9689cb',
    500: '#665bb4',
    950: '#000000',
  },
}

SCSS

$custom: #665bb4;
$custom-light: #9689cb;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb4",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 180
  },
  "hsl": {
    "h": 247.416,
    "s": 37.238,
    "l": 53.137
  },
  "oklch": {
    "l": 0.52513,
    "c": 0.13595,
    "h": 286.4
  },
  "luminance": 0.13602
}

Semantic roles & 50–950 ramp

primary

#665BB4

secondary

#C4C9A2

accent

#CD5BBF

background

#F9F8FC

surface

#F2F0F8

border

#CCCBD1

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #665BB4

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

Preview Lab → · Contrast checker → · Palette generator →