#666ED8#666ED8

#666ED8 is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.4% C 0.160 H 277.0°. Best body text is #000000 at 4.79:1 contrast (WCAG AA passes).

Color values

HEX	#666ED8
RGB	rgb(102, 110, 216)
HSL	hsl(236, 59%, 62%)
HSV	hsv(236, 53%, 85%)
CMYK	cmyk(52.8%, 49.1%, 0%, 15.3%)
CIE-LAB	lab(50.61, 26.47, -55.58)
CIE-LCH	lch(50.61, 61.57, 295.47°)
OKLab	oklab(58.45% 0.0195 -0.1585)
OKLCH	oklch(58.45% 0.16 277)
XYZ	xyz(23.4462, 18.9330, 67.3714)
Luminance	0.1893 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666ED8 #D8D066

analogous

#66A7D8 #666ED8 #9766D8

triadic

#666ED8 #D8666E #6ED866

tetradic

#666ED8 #D866A7 #D8D066 #66D897

square

#666ED8 #D866A7 #D8D066 #66D897

split-complementary

#666ED8 #D89766 #A7D866

monochromatic

#28309C #3540CC #666ED8 #979CE4 #C8CAF1

Accessibility & contrast

On white

4.39

#666ED8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.79

#666ED8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666ED8

4.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666ED8	#FFFFFF	#000000	##000000
##666ED8	1.00	4.39	4.79	4.79
#FFFFFF	4.39	1.00	21.00	21.00
#000000	4.79	21.00	1.00	1.00
##000000	4.79	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B7DDC

Deuteranopia (green-blind)

#2D74D6

Tritanopia (blue-blind)

#328599

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666ed8;
/* rgb */ color: rgb(102, 110, 216);
/* oklch */ color: oklch(58.4% 0.160 277.0);

Tailwind

colors: {
  custom: {
    50: '#9997e5',
    500: '#666ed8',
    950: '#000000',
  },
}

SCSS

$custom: #666ed8;
$custom-light: #9997e5;
$custom-dark: #000000;

JSON

{
  "hex": "#666ed8",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 216
  },
  "hsl": {
    "h": 235.789,
    "s": 59.375,
    "l": 62.353
  },
  "oklch": {
    "l": 0.58447,
    "c": 0.15969,
    "h": 277
  },
  "luminance": 0.18935
}

Semantic roles & 50–950 ramp

primary

#666ED8

secondary

#E2DFB8

accent

#BB1EC7

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0F0D16

muted

#7E7E84

Preview Lab

Preview with #666ED8

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

Preview Lab → · Contrast checker → · Palette generator →