#666EA1#666EA1

#666EA1 is a mid, moderate blue. Relative luminance 0.166; OKLCH L 55.3% C 0.080 H 276.6°. Best body text is #FFFFFF at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#666EA1
RGB	rgb(102, 110, 161)
HSL	hsl(232, 24%, 52%)
HSV	hsv(232, 37%, 63%)
CMYK	cmyk(36.6%, 31.7%, 0%, 36.9%)
CIE-LAB	lab(47.69, 9.86, -28.47)
CIE-LCH	lch(47.69, 30.13, 289.11°)
OKLab	oklab(55.27% 0.0092 -0.0794)
OKLCH	oklch(55.27% 0.08 276.6)
XYZ	xyz(17.4866, 16.5492, 35.9843)
Luminance	0.1655 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EA1 #A19966

analogous

#668CA1 #666EA1 #7C66A1

triadic

#666EA1 #A1666E #6EA166

tetradic

#666EA1 #A1668C #A19966 #66A17C

square

#666EA1 #A1668C #A19966 #66A17C

split-complementary

#666EA1 #A17C66 #8CA166

monochromatic

#363A57 #4D537D #666EA1 #8C92B8 #B2B6D0

Accessibility & contrast

On white

4.87

#666EA1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.31

#666EA1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666EA1

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EA1	#FFFFFF	#000000	##FFFFFF
##666EA1	1.00	4.87	4.31	4.87
#FFFFFF	4.87	1.00	21.00	1.00
#000000	4.31	21.00	1.00	21.00
##FFFFFF	4.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#5E74A3

Deuteranopia (green-blind)

#5A6FA0

Tritanopia (blue-blind)

#557880

Achromatopsia (no color)

#717171

Design tokens & code

CSS

--color: #666ea1;
/* rgb */ color: rgb(102, 110, 161);
/* oklch */ color: oklch(55.3% 0.080 276.6);

Tailwind

colors: {
  custom: {
    50: '#9397bd',
    500: '#666ea1',
    950: '#000000',
  },
}

SCSS

$custom: #666ea1;
$custom-light: #9397bd;
$custom-dark: #000000;

JSON

{
  "hex": "#666ea1",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 161
  },
  "hsl": {
    "h": 231.864,
    "s": 23.887,
    "l": 51.569
  },
  "oklch": {
    "l": 0.55265,
    "c": 0.07992,
    "h": 276.6
  },
  "luminance": 0.1655
}

Semantic roles & 50–950 ramp

primary

#666EA1

secondary

#BEBBA4

accent

#B467C0

background

#F9F9FB

surface

#F1F2F6

border

#CBCCD0

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666EA1

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

Preview Lab → · Contrast checker → · Palette generator →