#666AF0#666AF0

#666AF0 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 59.4% C 0.197 H 277.3°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#666AF0
RGB	rgb(102, 106, 240)
HSL	hsl(238, 82%, 67%)
HSV	hsv(238, 58%, 94%)
CMYK	cmyk(57.5%, 55.8%, 0%, 5.9%)
CIE-LAB	lab(51.18, 36.49, -68.17)
CIE-LCH	lch(51.18, 77.33, 298.16°)
OKLab	oklab(59.37% 0.0249 -0.1956)
OKLCH	oklch(59.37% 0.197 277.3)
XYZ	xyz(26.3567, 19.4222, 84.7812)
Luminance	0.1942 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AF0 #F0EC66

analogous

#66AFF0 #666AF0 #A766F0

triadic

#666AF0 #F0666A #6AF066

tetradic

#666AF0 #F066AF #F0EC66 #66F0A7

square

#666AF0 #F066AF #F0EC66 #66F0A7

split-complementary

#666AF0 #F0A766 #AFF066

monochromatic

#1419C8 #2E34EB #666AF0 #9EA0F5 #D5D7FB

Accessibility & contrast

On white

4.30

#666AF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#666AF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AF0

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AF0	#FFFFFF	#000000	##000000
##666AF0	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0080F5

Deuteranopia (green-blind)

#0074ED

Tritanopia (blue-blind)

#008AA3

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666af0;
/* rgb */ color: rgb(102, 106, 240);
/* oklch */ color: oklch(59.4% 0.197 277.3);

Tailwind

colors: {
  custom: {
    50: '#9d94f6',
    500: '#666af0',
    950: '#000000',
  },
}

SCSS

$custom: #666af0;
$custom-light: #9d94f6;
$custom-dark: #000000;

JSON

{
  "hex": "#666af0",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 240
  },
  "hsl": {
    "h": 238.261,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.59368,
    "c": 0.19715,
    "h": 277.3
  },
  "luminance": 0.19424
}

Semantic roles & 50–950 ramp

primary

#666AF0

secondary

#EFEEC3

accent

#D807DF

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666AF0

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

Preview Lab → · Contrast checker → · Palette generator →