#666DA3#666DA3

#666DA3 is a mid, moderate blue. Relative luminance 0.164; OKLCH L 55.2% C 0.084 H 277.6°. Best body text is #FFFFFF at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#666DA3
RGB	rgb(102, 109, 163)
HSL	hsl(233, 25%, 52%)
HSV	hsv(233, 37%, 64%)
CMYK	cmyk(37.4%, 33.1%, 0%, 36.1%)
CIE-LAB	lab(47.50, 11.04, -29.93)
CIE-LCH	lch(47.50, 31.90, 290.25°)
OKLab	oklab(55.15% 0.0112 -0.0836)
OKLCH	oklch(55.15% 0.084 277.6)
XYZ	xyz(17.5571, 16.4057, 36.8848)
Luminance	0.1641 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DA3 #A39C66

analogous

#668CA3 #666DA3 #7E66A3

triadic

#666DA3 #A3666D #6DA366

tetradic

#666DA3 #A3668C #A39C66 #66A37E

square

#666DA3 #A3668C #A39C66 #66A37E

split-complementary

#666DA3 #A37E66 #8CA366

monochromatic

#363A59 #4D527F #666DA3 #8C91BA #B2B6D1

Accessibility & contrast

On white

4.91

#666DA3 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.28

#666DA3 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666DA3

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DA3	#FFFFFF	#000000	##FFFFFF
##666DA3	1.00	4.91	4.28	4.91
#FFFFFF	4.91	1.00	21.00	1.00
#000000	4.28	21.00	1.00	21.00
##FFFFFF	4.91	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5C73A5

Deuteranopia (green-blind)

#586EA2

Tritanopia (blue-blind)

#547780

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #666da3;
/* rgb */ color: rgb(102, 109, 163);
/* oklch */ color: oklch(55.2% 0.084 277.6);

Tailwind

colors: {
  custom: {
    50: '#9496be',
    500: '#666da3',
    950: '#000000',
  },
}

SCSS

$custom: #666da3;
$custom-light: #9496be;
$custom-dark: #000000;

JSON

{
  "hex": "#666da3",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 163
  },
  "hsl": {
    "h": 233.115,
    "s": 24.898,
    "l": 51.961
  },
  "oklch": {
    "l": 0.55152,
    "c": 0.08435,
    "h": 277.6
  },
  "luminance": 0.16406
}

Semantic roles & 50–950 ramp

primary

#666DA3

secondary

#C0BDA5

accent

#B766C1

background

#F9F9FB

surface

#F2F2F7

border

#CCCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666DA3

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

Preview Lab → · Contrast checker → · Palette generator →