#666DF7#666DF7

#666DF7 is a mid, highly saturated blue. Relative luminance 0.205; OKLCH L 60.4% C 0.203 H 276.3°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#666DF7
RGB	rgb(102, 109, 247)
HSL	hsl(237, 90%, 68%)
HSV	hsv(237, 59%, 97%)
CMYK	cmyk(58.7%, 55.9%, 0%, 3.1%)
CIE-LAB	lab(52.37, 36.92, -70.14)
CIE-LCH	lch(52.37, 79.27, 297.76°)
OKLab	oklab(60.41% 0.0222 -0.2013)
OKLCH	oklch(60.41% 0.203 276.3)
XYZ	xyz(27.7312, 20.4754, 90.4685)
Luminance	0.2048 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DF7 #F7F066

analogous

#66B6F7 #666DF7 #A766F7

triadic

#666DF7 #F7666D #6DF766

tetradic

#666DF7 #F766B6 #F7F066 #66F7A7

square

#666DF7 #F766B6 #F7F066 #66F7A7

split-complementary

#666DF7 #F7A766 #B6F766

monochromatic

#0B15D7 #2C36F4 #666DF7 #A0A4FA #DADCFD

Accessibility & contrast

On white

4.12

#666DF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#666DF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DF7

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DF7	#FFFFFF	#000000	##000000
##666DF7	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0083FC

Deuteranopia (green-blind)

#0077F4

Tritanopia (blue-blind)

#008EA8

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #666df7;
/* rgb */ color: rgb(102, 109, 247);
/* oklch */ color: oklch(60.4% 0.203 276.3);

Tailwind

colors: {
  custom: {
    50: '#9e97fb',
    500: '#666df7',
    950: '#000000',
  },
}

SCSS

$custom: #666df7;
$custom-light: #9e97fb;
$custom-dark: #000000;

JSON

{
  "hex": "#666df7",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 247
  },
  "hsl": {
    "h": 237.103,
    "s": 90.062,
    "l": 68.431
  },
  "oklch": {
    "l": 0.60408,
    "c": 0.20256,
    "h": 276.3
  },
  "luminance": 0.20477
}

Semantic roles & 50–950 ramp

primary

#666DF7

secondary

#F2F0C7

accent

#DA00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666DF7

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

Preview Lab → · Contrast checker → · Palette generator →