#665BBB#665BBB

#665BBB is a mid, vivid blue. Relative luminance 0.139; OKLCH L 53.0% C 0.146 H 285.5°. Best body text is #FFFFFF at 5.56:1 contrast (WCAG AA passes).

Color values

HEX	#665BBB
RGB	rgb(102, 91, 187)
HSL	hsl(247, 41%, 55%)
HSV	hsv(247, 51%, 73%)
CMYK	cmyk(45.5%, 51.3%, 0%, 26.7%)
CIE-LAB	lab(44.08, 29.16, -49.39)
CIE-LCH	lch(44.08, 57.36, 300.55°)
OKLab	oklab(52.97% 0.039 -0.1404)
OKLCH	oklch(52.97% 0.146 285.5)
XYZ	xyz(18.1876, 13.8940, 48.7276)
Luminance	0.1389 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BBB #B0BB5B

analogous

#5B80BB #665BBB #965BBB

triadic

#665BBB #BB665B #5BBB66

tetradic

#665BBB #BB5B80 #B0BB5B #5BBB96

square

#665BBB #BB5B80 #B0BB5B #5BBB96

split-complementary

#665BBB #BB965B #80BB5B

monochromatic

#352E6E #4A4099 #665BBB #8E86CD #B7B2DF

Accessibility & contrast

On white

5.56

#665BBB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.78

#665BBB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BBB

5.56:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BBB	#FFFFFF	#000000	##FFFFFF
##665BBB	1.00	5.56	3.78	5.56
#FFFFFF	5.56	1.00	21.00	1.00
#000000	3.78	21.00	1.00	21.00
##FFFFFF	5.56	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F6BBE

Deuteranopia (green-blind)

#2C65B9

Tritanopia (blue-blind)

#4B6F82

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #665bbb;
/* rgb */ color: rgb(102, 91, 187);
/* oklch */ color: oklch(53.0% 0.146 285.5);

Tailwind

colors: {
  custom: {
    50: '#9789d0',
    500: '#665bbb',
    950: '#000000',
  },
}

SCSS

$custom: #665bbb;
$custom-light: #9789d0;
$custom-dark: #000000;

JSON

{
  "hex": "#665bbb",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 187
  },
  "hsl": {
    "h": 246.875,
    "s": 41.379,
    "l": 54.51
  },
  "oklch": {
    "l": 0.52969,
    "c": 0.14574,
    "h": 285.5
  },
  "luminance": 0.13895
}

Semantic roles & 50–950 ramp

primary

#665BBB

secondary

#C9CDA5

accent

#D157C3

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #665BBB

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

Preview Lab → · Contrast checker → · Palette generator →