#666FD8#666FD8

#666FD8 is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.6% C 0.158 H 276.7°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#666FD8
RGB	rgb(102, 111, 216)
HSL	hsl(235, 59%, 62%)
HSV	hsv(235, 53%, 85%)
CMYK	cmyk(52.8%, 48.6%, 0%, 15.3%)
CIE-LAB	lab(50.86, 25.86, -55.18)
CIE-LCH	lch(50.86, 60.94, 295.11°)
OKLab	oklab(58.64% 0.0184 -0.1573)
OKLCH	oklch(58.64% 0.158 276.7)
XYZ	xyz(23.5547, 19.1500, 67.4076)
Luminance	0.1915 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FD8 #D8CF66

analogous

#66A8D8 #666FD8 #9666D8

triadic

#666FD8 #D8666F #6FD866

tetradic

#666FD8 #D866A8 #D8CF66 #66D896

square

#666FD8 #D866A8 #D8CF66 #66D896

split-complementary

#666FD8 #D89666 #A8D866

monochromatic

#28319C #3541CC #666FD8 #979DE4 #C8CBF1

Accessibility & contrast

On white

4.35

#666FD8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#666FD8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FD8

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FD8	#FFFFFF	#000000	##000000
##666FD8	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)

#3D7EDC

Deuteranopia (green-blind)

#3075D6

Tritanopia (blue-blind)

#328699

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666fd8;
/* rgb */ color: rgb(102, 111, 216);
/* oklch */ color: oklch(58.6% 0.158 276.7);

Tailwind

colors: {
  custom: {
    50: '#9998e5',
    500: '#666fd8',
    950: '#000000',
  },
}

SCSS

$custom: #666fd8;
$custom-light: #9998e5;
$custom-dark: #000000;

JSON

{
  "hex": "#666fd8",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 216
  },
  "hsl": {
    "h": 235.263,
    "s": 59.375,
    "l": 62.353
  },
  "oklch": {
    "l": 0.58639,
    "c": 0.15837,
    "h": 276.7
  },
  "luminance": 0.19152
}

Semantic roles & 50–950 ramp

primary

#666FD8

secondary

#E2DEB8

accent

#BA1EC7

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666FD8

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

Preview Lab → · Contrast checker → · Palette generator →