#665BB5#665BB5

#665BB5 is a mid, vivid blue. Relative luminance 0.136; OKLCH L 52.6% C 0.137 H 286.3°. Best body text is #FFFFFF at 5.63:1 contrast (WCAG AA passes).

Color values

HEX	#665BB5
RGB	rgb(102, 91, 181)
HSL	hsl(247, 38%, 53%)
HSV	hsv(247, 50%, 71%)
CMYK	cmyk(43.6%, 49.7%, 0%, 29%)
CIE-LAB	lab(43.72, 27.37, -46.47)
CIE-LCH	lch(43.72, 53.93, 300.50°)
OKLab	oklab(52.58% 0.0384 -0.1319)
OKLCH	oklch(52.58% 0.137 286.3)
XYZ	xyz(17.5587, 13.6425, 45.4152)
Luminance	0.1364 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB5 #AAB55B

analogous

#5B7DB5 #665BB5 #935BB5

triadic

#665BB5 #B5665B #5BB566

tetradic

#665BB5 #B55B7D #AAB55B #5BB593

square

#665BB5 #B55B7D #AAB55B #5BB593

split-complementary

#665BB5 #B5935B #7DB55B

monochromatic

#352F67 #4B4291 #665BB5 #8D85C8 #B5AFDB

Accessibility & contrast

On white

5.63

#665BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.73

#665BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB5

5.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB5	#FFFFFF	#000000	##FFFFFF
##665BB5	1.00	5.63	3.73	5.63
#FFFFFF	5.63	1.00	21.00	1.00
#000000	3.73	21.00	1.00	21.00
##FFFFFF	5.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#356AB8

Deuteranopia (green-blind)

#3365B3

Tritanopia (blue-blind)

#4E6E7F

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #665bb5;
/* rgb */ color: rgb(102, 91, 181);
/* oklch */ color: oklch(52.6% 0.137 286.3);

Tailwind

colors: {
  custom: {
    50: '#9689cc',
    500: '#665bb5',
    950: '#000000',
  },
}

SCSS

$custom: #665bb5;
$custom-light: #9689cc;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb5",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 247.333,
    "s": 37.815,
    "l": 53.333
  },
  "oklch": {
    "l": 0.52578,
    "c": 0.13736,
    "h": 286.3
  },
  "luminance": 0.13643
}

Semantic roles & 50–950 ramp

primary

#665BB5

secondary

#C5C9A3

accent

#CE5AC0

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B13

muted

#7E7C82

Preview Lab

Preview with #665BB5

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

Preview Lab → · Contrast checker → · Palette generator →