#666AEB#666AEB

#666AEB is a mid, vivid blue. Relative luminance 0.191; OKLCH L 59.0% C 0.191 H 277.5°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#666AEB
RGB	rgb(102, 106, 235)
HSL	hsl(238, 77%, 66%)
HSV	hsv(238, 57%, 92%)
CMYK	cmyk(56.6%, 54.9%, 0%, 7.8%)
CIE-LAB	lab(50.84, 34.91, -65.92)
CIE-LCH	lch(50.84, 74.60, 297.90°)
OKLab	oklab(59.01% 0.0248 -0.189)
OKLCH	oklch(59.01% 0.191 277.5)
XYZ	xyz(25.6241, 19.1292, 80.9232)
Luminance	0.1913 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AEB #EBE766

analogous

#66ADEB #666AEB #A466EB

triadic

#666AEB #EB666A #6AEB66

tetradic

#666AEB #EB66AD #EBE766 #66EBA4

square

#666AEB #EB66AD #EBE766 #66EBA4

split-complementary

#666AEB #EBA466 #ADEB66

monochromatic

#191EBE #3035E4 #666AEB #9C9FF2 #D2D3F9

Accessibility & contrast

On white

4.35

#666AEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#666AEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AEB

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AEB	#FFFFFF	#000000	##000000
##666AEB	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#067FEF

Deuteranopia (green-blind)

#0074E8

Tritanopia (blue-blind)

#1488A0

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666aeb;
/* rgb */ color: rgb(102, 106, 235);
/* oklch */ color: oklch(59.0% 0.191 277.5);

Tailwind

colors: {
  custom: {
    50: '#9c94f2',
    500: '#666aeb',
    950: '#000000',
  },
}

SCSS

$custom: #666aeb;
$custom-light: #9c94f2;
$custom-dark: #000000;

JSON

{
  "hex": "#666aeb",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 235
  },
  "hsl": {
    "h": 238.195,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.59008,
    "c": 0.19058,
    "h": 277.5
  },
  "luminance": 0.19131
}

Semantic roles & 50–950 ramp

primary

#666AEB

secondary

#ECEBC1

accent

#D30CD9

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666AEB

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

Preview Lab → · Contrast checker → · Palette generator →