#666DF4#666DF4

#666DF4 is a mid, vivid blue. Relative luminance 0.203; OKLCH L 60.2% C 0.199 H 276.4°. Best body text is #000000 at 5.06:1 contrast (WCAG AA passes).

Color values

HEX	#666DF4
RGB	rgb(102, 109, 244)
HSL	hsl(237, 87%, 68%)
HSV	hsv(237, 58%, 96%)
CMYK	cmyk(58.2%, 55.3%, 0%, 4.3%)
CIE-LAB	lab(52.17, 35.97, -68.81)
CIE-LCH	lch(52.17, 77.64, 297.60°)
OKLab	oklab(60.19% 0.0222 -0.1974)
OKLCH	oklch(60.19% 0.199 276.4)
XYZ	xyz(27.2720, 20.2917, 88.0500)
Luminance	0.2029 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DF4 #F4ED66

analogous

#66B4F4 #666DF4 #A666F4

triadic

#666DF4 #F4666D #6DF466

tetradic

#666DF4 #F466B4 #F4ED66 #66F4A6

square

#666DF4 #F466B4 #F4ED66 #66F4A6

split-complementary

#666DF4 #F4A666 #B4F466

monochromatic

#0F19D1 #2D37F0 #666DF4 #9FA3F8 #D8DAFC

Accessibility & contrast

On white

4.15

#666DF4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.06

#666DF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DF4

5.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DF4	#FFFFFF	#000000	##000000
##666DF4	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)

#0083F9

Deuteranopia (green-blind)

#0077F1

Tritanopia (blue-blind)

#008DA6

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666df4;
/* rgb */ color: rgb(102, 109, 244);
/* oklch */ color: oklch(60.2% 0.199 276.4);

Tailwind

colors: {
  custom: {
    50: '#9d96f9',
    500: '#666df4',
    950: '#000000',
  },
}

SCSS

$custom: #666df4;
$custom-light: #9d96f9;
$custom-dark: #000000;

JSON

{
  "hex": "#666df4",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 244
  },
  "hsl": {
    "h": 237.042,
    "s": 86.585,
    "l": 67.843
  },
  "oklch": {
    "l": 0.6019,
    "c": 0.19865,
    "h": 276.4
  },
  "luminance": 0.20294
}

Semantic roles & 50–950 ramp

primary

#666DF4

secondary

#F1EFC5

accent

#D802E3

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666DF4

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

Preview Lab → · Contrast checker → · Palette generator →