#666BF4#666BF4

#666BF4 is a mid, highly saturated blue. Relative luminance 0.199; OKLCH L 59.8% C 0.201 H 276.9°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#666BF4
RGB	rgb(102, 107, 244)
HSL	hsl(238, 87%, 68%)
HSV	hsv(238, 58%, 96%)
CMYK	cmyk(58.2%, 56.1%, 0%, 4.3%)
CIE-LAB	lab(51.69, 37.17, -69.58)
CIE-LCH	lch(51.69, 78.88, 298.11°)
OKLab	oklab(59.84% 0.024 -0.1997)
OKLCH	oklch(59.84% 0.201 276.9)
XYZ	xyz(27.0611, 19.8698, 87.9797)
Luminance	0.1987 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BF4 #F4EF66

analogous

#66B2F4 #666BF4 #A866F4

triadic

#666BF4 #F4666B #6BF466

tetradic

#666BF4 #F466B2 #F4EF66 #66F4A8

square

#666BF4 #F466B2 #F4EF66 #66F4A8

split-complementary

#666BF4 #F4A866 #B2F466

monochromatic

#0F16D1 #2D34F0 #666BF4 #9FA2F8 #D8D9FC

Accessibility & contrast

On white

4.22

#666BF4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#666BF4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BF4

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BF4	#FFFFFF	#000000	##000000
##666BF4	1.00	4.22	4.97	4.97
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0081F9

Deuteranopia (green-blind)

#0075F1

Tritanopia (blue-blind)

#008BA5

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666bf4;
/* rgb */ color: rgb(102, 107, 244);
/* oklch */ color: oklch(59.8% 0.201 276.9);

Tailwind

colors: {
  custom: {
    50: '#9e95f9',
    500: '#666bf4',
    950: '#000000',
  },
}

SCSS

$custom: #666bf4;
$custom-light: #9e95f9;
$custom-dark: #000000;

JSON

{
  "hex": "#666bf4",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 244
  },
  "hsl": {
    "h": 237.887,
    "s": 86.585,
    "l": 67.843
  },
  "oklch": {
    "l": 0.59836,
    "c": 0.20113,
    "h": 276.9
  },
  "luminance": 0.19872
}

Semantic roles & 50–950 ramp

primary

#666BF4

secondary

#F1EFC5

accent

#DB02E3

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666BF4

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

Preview Lab → · Contrast checker → · Palette generator →