#665BB9#665BB9

#665BB9 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.8% C 0.143 H 285.7°. Best body text is #FFFFFF at 5.58:1 contrast (WCAG AA passes).

Color values

HEX	#665BB9
RGB	rgb(102, 91, 185)
HSL	hsl(247, 40%, 54%)
HSV	hsv(247, 51%, 73%)
CMYK	cmyk(44.9%, 50.8%, 0%, 27.5%)
CIE-LAB	lab(43.96, 28.56, -48.42)
CIE-LCH	lch(43.96, 56.22, 300.53°)
OKLab	oklab(52.84% 0.0388 -0.1376)
OKLCH	oklch(52.84% 0.143 285.7)
XYZ	xyz(17.9750, 13.8090, 47.6078)
Luminance	0.1381 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB9 #AEB95B

analogous

#5B7FB9 #665BB9 #955BB9

triadic

#665BB9 #B9665B #5BB966

tetradic

#665BB9 #B95B7F #AEB95B #5BB995

square

#665BB9 #B95B7F #AEB95B #5BB995

split-complementary

#665BB9 #B9955B #7FB95B

monochromatic

#352E6C #4A4097 #665BB9 #8E86CB #B6B1DE

Accessibility & contrast

On white

5.58

#665BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.76

#665BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB9

5.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB9	#FFFFFF	#000000	##FFFFFF
##665BB9	1.00	5.58	3.76	5.58
#FFFFFF	5.58	1.00	21.00	1.00
#000000	3.76	21.00	1.00	21.00
##FFFFFF	5.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#316BBC

Deuteranopia (green-blind)

#2F65B7

Tritanopia (blue-blind)

#4C6F81

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #665bb9;
/* rgb */ color: rgb(102, 91, 185);
/* oklch */ color: oklch(52.8% 0.143 285.7);

Tailwind

colors: {
  custom: {
    50: '#9689ce',
    500: '#665bb9',
    950: '#000000',
  },
}

SCSS

$custom: #665bb9;
$custom-light: #9689ce;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb9",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 185
  },
  "hsl": {
    "h": 247.021,
    "s": 40.171,
    "l": 54.118
  },
  "oklch": {
    "l": 0.52837,
    "c": 0.14297,
    "h": 285.7
  },
  "luminance": 0.1381
}

Semantic roles & 50–950 ramp

primary

#665BB9

secondary

#C7CCA4

accent

#D058C2

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #665BB9

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

Preview Lab → · Contrast checker → · Palette generator →