#666AEF#666AEF

#666AEF is a mid, vivid blue. Relative luminance 0.194; OKLCH L 59.3% C 0.196 H 277.3°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#666AEF
RGB	rgb(102, 106, 239)
HSL	hsl(238, 81%, 67%)
HSV	hsv(238, 57%, 94%)
CMYK	cmyk(57.3%, 55.6%, 0%, 6.3%)
CIE-LAB	lab(51.11, 36.18, -67.72)
CIE-LCH	lch(51.11, 76.78, 298.11°)
OKLab	oklab(59.3% 0.0249 -0.1942)
OKLCH	oklch(59.3% 0.196 277.3)
XYZ	xyz(26.2085, 19.3630, 84.0010)
Luminance	0.1936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AEF #EFEB66

analogous

#66AFEF #666AEF #A766EF

triadic

#666AEF #EF666A #6AEF66

tetradic

#666AEF #EF66AF #EFEB66 #66EFA7

square

#666AEF #EF66AF #EFEB66 #66EFA7

split-complementary

#666AEF #EFA766 #AFEF66

monochromatic

#151AC6 #2F34E9 #666AEF #9DA0F5 #D5D6FB

Accessibility & contrast

On white

4.31

#666AEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#666AEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AEF

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AEF	#FFFFFF	#000000	##000000
##666AEF	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0080F4

Deuteranopia (green-blind)

#0074EC

Tritanopia (blue-blind)

#0589A2

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666aef;
/* rgb */ color: rgb(102, 106, 239);
/* oklch */ color: oklch(59.3% 0.196 277.3);

Tailwind

colors: {
  custom: {
    50: '#9d94f5',
    500: '#666aef',
    950: '#000000',
  },
}

SCSS

$custom: #666aef;
$custom-light: #9d94f5;
$custom-dark: #000000;

JSON

{
  "hex": "#666aef",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 239
  },
  "hsl": {
    "h": 238.248,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.59296,
    "c": 0.19584,
    "h": 277.3
  },
  "luminance": 0.19365
}

Semantic roles & 50–950 ramp

primary

#666AEF

secondary

#EEEDC2

accent

#D708DD

background

#FAF9FF

surface

#F4F1FE

border

#CECBD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666AEF

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

Preview Lab → · Contrast checker → · Palette generator →