#665AA5#665AA5

#665AA5 is a mid, moderate blue. Relative luminance 0.129; OKLCH L 51.4% C 0.116 H 289.0°. Best body text is #FFFFFF at 5.88:1 contrast (WCAG AA passes).

Color values

HEX	#665AA5
RGB	rgb(102, 90, 165)
HSL	hsl(250, 29%, 50%)
HSV	hsv(250, 45%, 65%)
CMYK	cmyk(38.2%, 45.5%, 0%, 35.3%)
CIE-LAB	lab(42.54, 23.31, -38.92)
CIE-LCH	lch(42.54, 45.37, 300.92°)
OKLab	oklab(51.39% 0.0378 -0.1098)
OKLCH	oklch(51.39% 0.116 289)
XYZ	xyz(15.9253, 12.8533, 37.2319)
Luminance	0.1285 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#665AA5 #99A55A

analogous

#5A73A5 #665AA5 #8C5AA5

triadic

#665AA5 #A5665A #5AA566

tetradic

#665AA5 #A55A73 #99A55A #5AA58C

square

#665AA5 #A55A73 #99A55A #5AA58C

split-complementary

#665AA5 #A58C5A #73A55A

monochromatic

#352F56 #4E447D #665AA5 #8B82BB #AFA9D0

Accessibility & contrast

On white

5.88

#665AA5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.57

#665AA5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #665AA5

5.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##665AA5	#FFFFFF	#000000	##FFFFFF
##665AA5	1.00	5.88	3.57	5.88
#FFFFFF	5.88	1.00	21.00	1.00
#000000	3.57	21.00	1.00	21.00
##FFFFFF	5.88	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4066A8

Deuteranopia (green-blind)

#4063A3

Tritanopia (blue-blind)

#556977

Achromatopsia (no color)

#646464

Design tokens & code

CSS

--color: #665aa5;
/* rgb */ color: rgb(102, 90, 165);
/* oklch */ color: oklch(51.4% 0.116 289.0);

Tailwind

colors: {
  custom: {
    50: '#9488c0',
    500: '#665aa5',
    950: '#000000',
  },
}

SCSS

$custom: #665aa5;
$custom-light: #9488c0;
$custom-dark: #000000;

JSON

{
  "hex": "#665aa5",
  "rgb": {
    "r": 102,
    "g": 90,
    "b": 165
  },
  "hsl": {
    "h": 249.6,
    "s": 29.412,
    "l": 50
  },
  "oklch": {
    "l": 0.51394,
    "c": 0.11608,
    "h": 289
  },
  "luminance": 0.12854
}

Semantic roles & 50–950 ramp

primary

#665AA5

secondary

#B9BE9D

accent

#C662B6

background

#F9F8FB

surface

#F2F0F7

border

#CCCBD0

text

#0D0B12

muted

#7E7C81

Preview Lab

Preview with #665AA5

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

Preview Lab → · Contrast checker → · Palette generator →