#665AA4#665AA4

#665AA4 is a mid, moderate blue. Relative luminance 0.128; OKLCH L 51.3% C 0.115 H 289.2°. Best body text is #FFFFFF at 5.89:1 contrast (WCAG AA passes).

Color values

HEX	#665AA4
RGB	rgb(102, 90, 164)
HSL	hsl(250, 29%, 50%)
HSV	hsv(250, 45%, 64%)
CMYK	cmyk(37.8%, 45.1%, 0%, 35.7%)
CIE-LAB	lab(42.49, 23.03, -38.42)
CIE-LCH	lch(42.49, 44.79, 300.94°)
OKLab	oklab(51.33% 0.0376 -0.1083)
OKLCH	oklch(51.33% 0.115 289.2)
XYZ	xyz(15.8347, 12.8170, 36.7544)
Luminance	0.1282 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665AA4 #98A45A

analogous

#5A73A4 #665AA4 #8B5AA4

triadic

#665AA4 #A4665A #5AA466

tetradic

#665AA4 #A45A73 #98A45A #5AA48B

square

#665AA4 #A45A73 #98A45A #5AA48B

split-complementary

#665AA4 #A48B5A #73A45A

monochromatic

#352F55 #4D447C #665AA4 #8A81BA #AFA9D0

Accessibility & contrast

On white

5.89

#665AA4 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.56

#665AA4 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665AA4

5.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665AA4	#FFFFFF	#000000	##FFFFFF
##665AA4	1.00	5.89	3.56	5.89
#FFFFFF	5.89	1.00	21.00	1.00
#000000	3.56	21.00	1.00	21.00
##FFFFFF	5.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4066A7

Deuteranopia (green-blind)

#4163A2

Tritanopia (blue-blind)

#566877

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #665aa4;
/* rgb */ color: rgb(102, 90, 164);
/* oklch */ color: oklch(51.3% 0.115 289.2);

Tailwind

colors: {
  custom: {
    50: '#9488bf',
    500: '#665aa4',
    950: '#000000',
  },
}

SCSS

$custom: #665aa4;
$custom-light: #9488bf;
$custom-dark: #000000;

JSON

{
  "hex": "#665aa4",
  "rgb": {
    "r": 102,
    "g": 90,
    "b": 164
  },
  "hsl": {
    "h": 249.73,
    "s": 29.134,
    "l": 49.804
  },
  "oklch": {
    "l": 0.51335,
    "c": 0.11463,
    "h": 289.2
  },
  "luminance": 0.12817
}

Semantic roles & 50–950 ramp

primary

#665AA4

secondary

#B8BE9C

accent

#C562B5

background

#F9F8FB

surface

#F2F0F7

border

#CCCBD0

text

#0D0B12

muted

#7E7C81

Preview Lab

Preview with #665AA4

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

Preview Lab → · Contrast checker → · Palette generator →