#665BB8#665BB8

#665BB8 is a mid, vivid blue. Relative luminance 0.138; OKLCH L 52.8% C 0.142 H 285.9°. Best body text is #FFFFFF at 5.59:1 contrast (WCAG AA passes).

Color values

HEX	#665BB8
RGB	rgb(102, 91, 184)
HSL	hsl(247, 40%, 54%)
HSV	hsv(247, 51%, 72%)
CMYK	cmyk(44.6%, 50.5%, 0%, 27.8%)
CIE-LAB	lab(43.90, 28.26, -47.94)
CIE-LCH	lch(43.90, 55.65, 300.52°)
OKLab	oklab(52.77% 0.0387 -0.1362)
OKLCH	oklch(52.77% 0.142 285.9)
XYZ	xyz(17.8698, 13.7669, 47.0538)
Luminance	0.1377 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665BB8 #ADB85B

analogous

#5B7FB8 #665BB8 #955BB8

triadic

#665BB8 #B8665B #5BB866

tetradic

#665BB8 #B85B7F #ADB85B #5BB895

square

#665BB8 #B85B7F #ADB85B #5BB895

split-complementary

#665BB8 #B8955B #7FB85B

monochromatic

#352E6A #4B4195 #665BB8 #8E86CA #B6B0DD

Accessibility & contrast

On white

5.59

#665BB8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.75

#665BB8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665BB8

5.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665BB8	#FFFFFF	#000000	##FFFFFF
##665BB8	1.00	5.59	3.75	5.59
#FFFFFF	5.59	1.00	21.00	1.00
#000000	3.75	21.00	1.00	21.00
##FFFFFF	5.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#326ABB

Deuteranopia (green-blind)

#3065B6

Tritanopia (blue-blind)

#4C6F81

Achromatopsia (no color)

#686868

Design tokens & code

CSS

--color: #665bb8;
/* rgb */ color: rgb(102, 91, 184);
/* oklch */ color: oklch(52.8% 0.142 285.9);

Tailwind

colors: {
  custom: {
    50: '#9689ce',
    500: '#665bb8',
    950: '#000000',
  },
}

SCSS

$custom: #665bb8;
$custom-light: #9689ce;
$custom-dark: #000000;

JSON

{
  "hex": "#665bb8",
  "rgb": {
    "r": 102,
    "g": 91,
    "b": 184
  },
  "hsl": {
    "h": 247.097,
    "s": 39.574,
    "l": 53.922
  },
  "oklch": {
    "l": 0.52772,
    "c": 0.14157,
    "h": 285.9
  },
  "luminance": 0.13768
}

Semantic roles & 50–950 ramp

primary

#665BB8

secondary

#C7CBA4

accent

#CF58C1

background

#F9F8FC

surface

#F2F0F9

border

#CCCBD2

text

#0E0B14

muted

#7E7C82

Preview Lab

Preview with #665BB8

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

Preview Lab → · Contrast checker → · Palette generator →