#666DCF#666DCF

#666DCF is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.7% C 0.149 H 277.6°. Best body text is #000000 at 4.65:1 contrast (WCAG AA passes).

Color values

HEX	#666DCF
RGB	rgb(102, 109, 207)
HSL	hsl(236, 52%, 61%)
HSV	hsv(236, 51%, 81%)
CMYK	cmyk(50.7%, 47.3%, 0%, 18.8%)
CIE-LAB	lab(49.82, 24.26, -51.73)
CIE-LCH	lch(49.82, 57.14, 295.13°)
OKLab	oklab(57.68% 0.0196 -0.1472)
OKLCH	oklch(57.68% 0.149 277.6)
XYZ	xyz(22.2071, 18.2657, 61.3749)
Luminance	0.1827 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DCF #CFC866

analogous

#66A1CF #666DCF #9366CF

triadic

#666DCF #CF666D #6DCF66

tetradic

#666DCF #CF66A1 #CFC866 #66CF93

square

#666DCF #CF66A1 #CFC866 #66CF93

split-complementary

#666DCF #CF9366 #A1CF66

monochromatic

#2D338E #3B44BD #666DCF #9599DE #C3C6EC

Accessibility & contrast

On white

4.51

#666DCF on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.65

#666DCF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DCF

4.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DCF	#FFFFFF	#000000	##000000
##666DCF	1.00	4.51	4.65	4.65
#FFFFFF	4.51	1.00	21.00	21.00
#000000	4.65	21.00	1.00	1.00
##000000	4.65	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#417BD3

Deuteranopia (green-blind)

#3772CD

Tritanopia (blue-blind)

#3B8294

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666dcf;
/* rgb */ color: rgb(102, 109, 207);
/* oklch */ color: oklch(57.7% 0.149 277.6);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#666dcf",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 207
  },
  "hsl": {
    "h": 236,
    "s": 52.239,
    "l": 60.588
  },
  "oklch": {
    "l": 0.57675,
    "c": 0.14851,
    "h": 277.6
  },
  "luminance": 0.18267
}

Semantic roles & 50–950 ramp

primary

#666DCF

secondary

#DCDAB4

accent

#B526C0

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666DCF

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

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