#666EA9#666EA9

#666EA9 is a mid, moderate blue. Relative luminance 0.168; OKLCH L 55.7% C 0.092 H 277.1°. Best body text is #FFFFFF at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#666EA9
RGB	rgb(102, 110, 169)
HSL	hsl(233, 28%, 53%)
HSV	hsv(233, 40%, 66%)
CMYK	cmyk(39.6%, 34.9%, 0%, 33.7%)
CIE-LAB	lab(48.06, 12.16, -32.58)
CIE-LCH	lch(48.06, 34.77, 290.46°)
OKLab	oklab(55.67% 0.0113 -0.0913)
OKLCH	oklch(55.67% 0.092 277.1)
XYZ	xyz(18.2147, 16.8404, 39.8192)
Luminance	0.1684 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EA9 #A9A166

analogous

#668FA9 #666EA9 #7F66A9

triadic

#666EA9 #A9666E #6EA966

tetradic

#666EA9 #A9668F #A9A166 #66A97F

square

#666EA9 #A9668F #A9A166 #66A97F

split-complementary

#666EA9 #A97F66 #8FA966

monochromatic

#353A5F #4B5386 #666EA9 #8D93BF #B4B8D5

Accessibility & contrast

On white

4.81

#666EA9 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.37

#666EA9 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #666EA9

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EA9	#FFFFFF	#000000	##FFFFFF
##666EA9	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)

#5A75AB

Deuteranopia (green-blind)

#5670A8

Tritanopia (blue-blind)

#527A84

Achromatopsia (no color)

#727272

Design tokens & code

CSS

--color: #666ea9;
/* rgb */ color: rgb(102, 110, 169);
/* oklch */ color: oklch(55.7% 0.092 277.1);

Tailwind

colors: {
  custom: {
    50: '#9497c3',
    500: '#666ea9',
    950: '#000000',
  },
}

SCSS

$custom: #666ea9;
$custom-light: #9497c3;
$custom-dark: #000000;

JSON

{
  "hex": "#666ea9",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 169
  },
  "hsl": {
    "h": 232.836,
    "s": 28.033,
    "l": 53.137
  },
  "oklch": {
    "l": 0.55674,
    "c": 0.09196,
    "h": 277.1
  },
  "luminance": 0.16841
}

Semantic roles & 50–950 ramp

primary

#666EA9

secondary

#C4C0A7

accent

#B963C4

background

#F9F9FC

surface

#F2F2F8

border

#CCCCD1

text

#0D0D12

muted

#7E7E81

Preview Lab

Preview with #666EA9

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

Preview Lab → · Contrast checker → · Palette generator →