#666ACA#666ACA

#666ACA is a mid, vivid blue. Relative luminance 0.174; OKLCH L 56.8% C 0.146 H 278.9°. Best body text is #FFFFFF at 4.69:1 contrast (WCAG AA passes).

Color values

HEX	#666ACA
RGB	rgb(102, 106, 202)
HSL	hsl(238, 49%, 60%)
HSV	hsv(238, 50%, 79%)
CMYK	cmyk(49.5%, 47.5%, 0%, 20.8%)
CIE-LAB	lab(48.76, 24.54, -50.57)
CIE-LCH	lch(48.76, 56.22, 295.89°)
OKLab	oklab(56.78% 0.0225 -0.1438)
OKLCH	oklch(56.78% 0.146 278.9)
XYZ	xyz(21.2909, 17.3959, 58.1015)
Luminance	0.1740 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666ACA #CAC666

analogous

#669CCA #666ACA #9466CA

triadic

#666ACA #CA666A #6ACA66

tetradic

#666ACA #CA669C #CAC666 #66CA94

square

#666ACA #CA669C #CAC666 #66CA94

split-complementary

#666ACA #CA9466 #9CCA66

monochromatic

#2F3287 #3E43B4 #666ACA #9396DA #C1C3E9

Accessibility & contrast

On white

4.69

#666ACA on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.48

#666ACA on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666ACA

4.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666ACA	#FFFFFF	#000000	##FFFFFF
##666ACA	1.00	4.69	4.48	4.69
#FFFFFF	4.69	1.00	21.00	1.00
#000000	4.48	21.00	1.00	21.00
##FFFFFF	4.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4078CE

Deuteranopia (green-blind)

#3770C8

Tritanopia (blue-blind)

#3F7F90

Achromatopsia (no color)

#747474

Design tokens & code

CSS

--color: #666aca;
/* rgb */ color: rgb(102, 106, 202);
/* oklch */ color: oklch(56.8% 0.146 278.9);

Tailwind

colors: {
  custom: {
    50: '#9894db',
    500: '#666aca',
    950: '#000000',
  },
}

SCSS

$custom: #666aca;
$custom-light: #9894db;
$custom-dark: #000000;

JSON

{
  "hex": "#666aca",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 202
  },
  "hsl": {
    "h": 237.6,
    "s": 48.544,
    "l": 59.608
  },
  "oklch": {
    "l": 0.56777,
    "c": 0.14557,
    "h": 278.9
  },
  "luminance": 0.17397
}

Semantic roles & 50–950 ramp

primary

#666ACA

secondary

#D9D8B2

accent

#D350D8

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666ACA

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

Preview Lab → · Contrast checker → · Palette generator →