#666CEE#666CEE

#666CEE is a mid, vivid blue. Relative luminance 0.197; OKLCH L 59.6% C 0.192 H 276.9°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#666CEE
RGB	rgb(102, 108, 238)
HSL	hsl(237, 80%, 67%)
HSV	hsv(237, 57%, 93%)
CMYK	cmyk(57.1%, 54.6%, 0%, 6.7%)
CIE-LAB	lab(51.52, 34.66, -66.50)
CIE-LCH	lch(51.52, 74.99, 297.53°)
OKLab	oklab(59.58% 0.023 -0.1906)
OKLCH	oklch(59.58% 0.192 276.9)
XYZ	xyz(26.2697, 19.7211, 83.2946)
Luminance	0.1972 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CEE #EEE866

analogous

#66B0EE #666CEE #A466EE

triadic

#666CEE #EE666C #6CEE66

tetradic

#666CEE #EE66B0 #EEE866 #66EEA4

square

#666CEE #EE66B0 #EEE866 #66EEA4

split-complementary

#666CEE #EEA466 #B0EE66

monochromatic

#161DC4 #2F37E8 #666CEE #9DA1F4 #D4D6FA

Accessibility & contrast

On white

4.25

#666CEE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#666CEE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CEE

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CEE	#FFFFFF	#000000	##000000
##666CEE	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0A81F2

Deuteranopia (green-blind)

#0075EB

Tritanopia (blue-blind)

#088AA3

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666cee;
/* rgb */ color: rgb(102, 108, 238);
/* oklch */ color: oklch(59.6% 0.192 276.9);

Tailwind

colors: {
  custom: {
    50: '#9d96f4',
    500: '#666cee',
    950: '#000000',
  },
}

SCSS

$custom: #666cee;
$custom-light: #9d96f4;
$custom-dark: #000000;

JSON

{
  "hex": "#666cee",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 238
  },
  "hsl": {
    "h": 237.353,
    "s": 80,
    "l": 66.667
  },
  "oklch": {
    "l": 0.59581,
    "c": 0.19201,
    "h": 276.9
  },
  "luminance": 0.19723
}

Semantic roles & 50–950 ramp

primary

#666CEE

secondary

#EEECC2

accent

#D309DC

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666CEE

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

Preview Lab → · Contrast checker → · Palette generator →