#666AE9#666AE9

#666AE9 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.9% C 0.188 H 277.6°. Best body text is #000000 at 4.80:1 contrast (WCAG AA passes).

Color values

HEX	#666AE9
RGB	rgb(102, 106, 233)
HSL	hsl(238, 75%, 66%)
HSV	hsv(238, 56%, 91%)
CMYK	cmyk(56.2%, 54.5%, 0%, 8.6%)
CIE-LAB	lab(50.70, 34.27, -65.02)
CIE-LCH	lch(50.70, 73.50, 297.80°)
OKLab	oklab(58.87% 0.0248 -0.1863)
OKLCH	oklch(58.87% 0.188 277.6)
XYZ	xyz(25.3368, 19.0143, 79.4100)
Luminance	0.1902 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AE9 #E9E566

analogous

#66ABE9 #666AE9 #A366E9

triadic

#666AE9 #E9666A #6AE966

tetradic

#666AE9 #E966AB #E9E566 #66E9A3

square

#666AE9 #E966AB #E9E566 #66E9A3

split-complementary

#666AE9 #E9A366 #ABE966

monochromatic

#1B20BA #3036E1 #666AE9 #9C9EF1 #D1D2F8

Accessibility & contrast

On white

4.37

#666AE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.80

#666AE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AE9

4.80:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AE9	#FFFFFF	#000000	##000000
##666AE9	1.00	4.37	4.80	4.80
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.80	21.00	1.00	1.00
##000000	4.80	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#107EED

Deuteranopia (green-blind)

#0073E6

Tritanopia (blue-blind)

#1A879F

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666ae9;
/* rgb */ color: rgb(102, 106, 233);
/* oklch */ color: oklch(58.9% 0.188 277.6);

Tailwind

colors: {
  custom: {
    50: '#9c94f1',
    500: '#666ae9',
    950: '#000000',
  },
}

SCSS

$custom: #666ae9;
$custom-light: #9c94f1;
$custom-dark: #000000;

JSON

{
  "hex": "#666ae9",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 233
  },
  "hsl": {
    "h": 238.168,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.58865,
    "c": 0.18793,
    "h": 277.6
  },
  "luminance": 0.19016
}

Semantic roles & 50–950 ramp

primary

#666AE9

secondary

#EBEAC0

accent

#D10ED7

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666AE9

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

Preview Lab → · Contrast checker → · Palette generator →