#666FED#666FED

#666FED is a mid, vivid blue. Relative luminance 0.203; OKLCH L 60.1% C 0.187 H 276.1°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#666FED
RGB	rgb(102, 111, 237)
HSL	hsl(236, 79%, 66%)
HSV	hsv(236, 57%, 93%)
CMYK	cmyk(57%, 53.2%, 0%, 7.1%)
CIE-LAB	lab(52.18, 32.53, -64.87)
CIE-LCH	lch(52.18, 72.57, 296.63°)
OKLab	oklab(60.05% 0.02 -0.1858)
OKLCH	oklch(60.05% 0.187 276.1)
XYZ	xyz(26.4451, 20.3062, 82.6303)
Luminance	0.2031 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FED #EDE466

analogous

#66B3ED #666FED #A166ED

triadic

#666FED #ED666F #6FED66

tetradic

#666FED #ED66B3 #EDE466 #66EDA1

square

#666FED #ED66B3 #EDE466 #66EDA1

split-complementary

#666FED #EDA166 #B3ED66

monochromatic

#1722C2 #2F3BE7 #666FED #9DA3F3 #D4D6FA

Accessibility & contrast

On white

4.15

#666FED on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#666FED on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FED

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FED	#FFFFFF	#000000	##000000
##666FED	1.00	4.15	5.06	5.06
#FFFFFF	4.15	1.00	21.00	21.00
#000000	5.06	21.00	1.00	1.00
##000000	5.06	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F82F1

Deuteranopia (green-blind)

#0077EA

Tritanopia (blue-blind)

#0B8CA3

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666fed;
/* rgb */ color: rgb(102, 111, 237);
/* oklch */ color: oklch(60.1% 0.187 276.1);

Tailwind

colors: {
  custom: {
    50: '#9c98f4',
    500: '#666fed',
    950: '#000000',
  },
}

SCSS

$custom: #666fed;
$custom-light: #9c98f4;
$custom-dark: #000000;

JSON

{
  "hex": "#666fed",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 237
  },
  "hsl": {
    "h": 236,
    "s": 78.947,
    "l": 66.471
  },
  "oklch": {
    "l": 0.60054,
    "c": 0.18689,
    "h": 276.1
  },
  "luminance": 0.20308
}

Semantic roles & 50–950 ramp

primary

#666FED

secondary

#EDEAC2

accent

#CD0ADB

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666FED

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

Preview Lab → · Contrast checker → · Palette generator →