#666CCF#666CCF

#666CCF is a mid, vivid blue. Relative luminance 0.181; OKLCH L 57.5% C 0.150 H 278.0°. Best body text is #000000 at 4.61:1 contrast (WCAG AA passes).

Color values

HEX	#666CCF
RGB	rgb(102, 108, 207)
HSL	hsl(237, 52%, 61%)
HSV	hsv(237, 51%, 81%)
CMYK	cmyk(50.7%, 47.8%, 0%, 18.8%)
CIE-LAB	lab(49.56, 24.87, -52.14)
CIE-LCH	lch(49.56, 57.77, 295.50°)
OKLab	oklab(57.48% 0.0208 -0.1484)
OKLCH	oklch(57.48% 0.15 278)
XYZ	xyz(22.1010, 18.0536, 61.3395)
Luminance	0.1805 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CCF #CFC966

analogous

#66A1CF #666CCF #9466CF

triadic

#666CCF #CF666C #6CCF66

tetradic

#666CCF #CF66A1 #CFC966 #66CF94

square

#666CCF #CF66A1 #CFC966 #66CF94

split-complementary

#666CCF #CF9466 #A1CF66

monochromatic

#2D328E #3B43BD #666CCF #9599DE #C3C6EC

Accessibility & contrast

On white

4.55

#666CCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.61

#666CCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CCF

4.61:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CCF	#FFFFFF	#000000	##000000
##666CCF	1.00	4.55	4.61	4.61
#FFFFFF	4.55	1.00	21.00	21.00
#000000	4.61	21.00	1.00	1.00
##000000	4.61	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7AD3

Deuteranopia (green-blind)

#3572CD

Tritanopia (blue-blind)

#3B8193

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666ccf;
/* rgb */ color: rgb(102, 108, 207);
/* oklch */ color: oklch(57.5% 0.150 278.0);

Tailwind

colors: {
  custom: {
    50: '#9896de',
    500: '#666ccf',
    950: '#000000',
  },
}

SCSS

$custom: #666ccf;
$custom-light: #9896de;
$custom-dark: #000000;

JSON

{
  "hex": "#666ccf",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 207
  },
  "hsl": {
    "h": 236.571,
    "s": 52.239,
    "l": 60.588
  },
  "oklch": {
    "l": 0.57482,
    "c": 0.14985,
    "h": 278
  },
  "luminance": 0.18055
}

Semantic roles & 50–950 ramp

primary

#666CCF

secondary

#DCDAB4

accent

#B726C0

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666CCF

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

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