#666BB9#666BB9

#666BB9 is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.9% C 0.120 H 279.0°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#666BB9
RGB	rgb(102, 107, 185)
HSL	hsl(236, 37%, 56%)
HSV	hsv(236, 45%, 73%)
CMYK	cmyk(44.9%, 42.2%, 0%, 27.5%)
CIE-LAB	lab(48.06, 18.73, -41.89)
CIE-LCH	lch(48.06, 45.88, 294.09°)
OKLab	oklab(55.94% 0.0187 -0.1184)
OKLCH	oklch(55.94% 0.12 279)
XYZ	xyz(19.4915, 16.8420, 48.1133)
Luminance	0.1684 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BB9 #B9B466

analogous

#6695B9 #666BB9 #8B66B9

triadic

#666BB9 #B9666B #6BB966

tetradic

#666BB9 #B96695 #B9B466 #66B98B

square

#666BB9 #B96695 #B9B466 #66B98B

split-complementary

#666BB9 #B98B66 #95B966

monochromatic

#343771 #474C9B #666BB9 #9094CC #BABCDF

Accessibility & contrast

On white

4.81

#666BB9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#666BB9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666BB9

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BB9	#FFFFFF	#000000	##FFFFFF
##666BB9	1.00	4.81	4.37	4.81
#FFFFFF	4.81	1.00	21.00	1.00
#000000	4.37	21.00	1.00	21.00
##FFFFFF	4.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4E75BC

Deuteranopia (green-blind)

#486FB7

Tritanopia (blue-blind)

#4A7B89

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666bb9;
/* rgb */ color: rgb(102, 107, 185);
/* oklch */ color: oklch(55.9% 0.120 279.0);

Tailwind

colors: {
  custom: {
    50: '#9695ce',
    500: '#666bb9',
    950: '#000000',
  },
}

SCSS

$custom: #666bb9;
$custom-light: #9695ce;
$custom-dark: #000000;

JSON

{
  "hex": "#666bb9",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 185
  },
  "hsl": {
    "h": 236.386,
    "s": 37.22,
    "l": 56.275
  },
  "oklch": {
    "l": 0.5594,
    "c": 0.11983,
    "h": 279
  },
  "luminance": 0.16843
}

Semantic roles & 50–950 ramp

primary

#666BB9

secondary

#CECCAC

accent

#C65BCD

background

#F9F9FC

surface

#F2F1F9

border

#CCCBD2

text

#0E0D14

muted

#7E7E82

Preview Lab

Preview with #666BB9

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

Preview Lab → · Contrast checker → · Palette generator →