#666DE8#666DE8

#666DE8 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 59.3% C 0.183 H 276.8°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#666DE8
RGB	rgb(102, 109, 232)
HSL	hsl(237, 74%, 65%)
HSV	hsv(237, 56%, 91%)
CMYK	cmyk(56%, 53%, 0%, 9%)
CIE-LAB	lab(51.37, 32.15, -63.39)
CIE-LCH	lch(51.37, 71.07, 296.89°)
OKLab	oklab(59.34% 0.0217 -0.1815)
OKLCH	oklch(59.34% 0.183 276.8)
XYZ	xyz(25.5090, 19.5865, 78.7646)
Luminance	0.1959 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DE8 #E8E166

analogous

#66AEE8 #666DE8 #A066E8

triadic

#666DE8 #E8666D #6DE866

tetradic

#666DE8 #E866AE #E8E166 #66E8A0

square

#666DE8 #E866AE #E8E166 #66E8A0

split-complementary

#666DE8 #E8A066 #AEE866

monochromatic

#1C24B8 #313AE0 #666DE8 #9BA0F0 #D0D3F8

Accessibility & contrast

On white

4.27

#666DE8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#666DE8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DE8

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DE8	#FFFFFF	#000000	##000000
##666DE8	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2280EC

Deuteranopia (green-blind)

#0075E5

Tritanopia (blue-blind)

#1B89A0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666de8;
/* rgb */ color: rgb(102, 109, 232);
/* oklch */ color: oklch(59.3% 0.183 276.8);

Tailwind

colors: {
  custom: {
    50: '#9c96f0',
    500: '#666de8',
    950: '#000000',
  },
}

SCSS

$custom: #666de8;
$custom-light: #9c96f0;
$custom-dark: #000000;

JSON

{
  "hex": "#666de8",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 232
  },
  "hsl": {
    "h": 236.769,
    "s": 73.864,
    "l": 65.49
  },
  "oklch": {
    "l": 0.59339,
    "c": 0.18277,
    "h": 276.8
  },
  "luminance": 0.19588
}

Semantic roles & 50–950 ramp

primary

#666DE8

secondary

#EBE8BF

accent

#CB10D6

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DE8

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

Preview Lab → · Contrast checker → · Palette generator →