#666AEC#666AEC

#666AEC is a mid, vivid blue. Relative luminance 0.192; OKLCH L 59.1% C 0.192 H 277.4°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#666AEC
RGB	rgb(102, 106, 236)
HSL	hsl(238, 78%, 66%)
HSV	hsv(238, 57%, 93%)
CMYK	cmyk(56.8%, 55.1%, 0%, 7.5%)
CIE-LAB	lab(50.91, 35.23, -66.38)
CIE-LCH	lch(50.91, 75.14, 297.95°)
OKLab	oklab(59.08% 0.0249 -0.1903)
OKLCH	oklch(59.08% 0.192 277.4)
XYZ	xyz(25.7690, 19.1872, 81.6862)
Luminance	0.1919 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AEC #ECE866

analogous

#66ADEC #666AEC #A566EC

triadic

#666AEC #EC666A #6AEC66

tetradic

#666AEC #EC66AD #ECE866 #66ECA5

square

#666AEC #EC66AD #ECE866 #66ECA5

split-complementary

#666AEC #ECA566 #ADEC66

monochromatic

#181DC0 #3035E5 #666AEC #9C9FF3 #D3D4FA

Accessibility & contrast

On white

4.34

#666AEC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#666AEC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AEC

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AEC	#FFFFFF	#000000	##000000
##666AEC	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#007FF0

Deuteranopia (green-blind)

#0074E9

Tritanopia (blue-blind)

#1188A1

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666aec;
/* rgb */ color: rgb(102, 106, 236);
/* oklch */ color: oklch(59.1% 0.192 277.4);

Tailwind

colors: {
  custom: {
    50: '#9c94f3',
    500: '#666aec',
    950: '#000000',
  },
}

SCSS

$custom: #666aec;
$custom-light: #9c94f3;
$custom-dark: #000000;

JSON

{
  "hex": "#666aec",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 236
  },
  "hsl": {
    "h": 238.209,
    "s": 77.907,
    "l": 66.275
  },
  "oklch": {
    "l": 0.5908,
    "c": 0.1919,
    "h": 277.4
  },
  "luminance": 0.19189
}

Semantic roles & 50–950 ramp

primary

#666AEC

secondary

#EDEBC1

accent

#D40BDA

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666AEC

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

Preview Lab → · Contrast checker → · Palette generator →