#666DE9#666DE9

#666DE9 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 59.4% C 0.184 H 276.8°. Best body text is #000000 at 4.93:1 contrast (WCAG AA passes).

Color values

HEX	#666DE9
RGB	rgb(102, 109, 233)
HSL	hsl(237, 75%, 66%)
HSV	hsv(237, 56%, 91%)
CMYK	cmyk(56.2%, 53.2%, 0%, 8.6%)
CIE-LAB	lab(51.43, 32.46, -63.84)
CIE-LCH	lch(51.43, 71.62, 296.95°)
OKLab	oklab(59.41% 0.0218 -0.1828)
OKLCH	oklch(59.41% 0.184 276.8)
XYZ	xyz(25.6514, 19.6435, 79.5148)
Luminance	0.1965 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DE9 #E9E266

analogous

#66AEE9 #666DE9 #A066E9

triadic

#666DE9 #E9666D #6DE966

tetradic

#666DE9 #E966AE #E9E266 #66E9A0

square

#666DE9 #E966AE #E9E266 #66E9A0

split-complementary

#666DE9 #E9A066 #AEE966

monochromatic

#1B23BA #303AE1 #666DE9 #9CA0F1 #D1D3F8

Accessibility & contrast

On white

4.26

#666DE9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.93

#666DE9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DE9

4.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DE9	#FFFFFF	#000000	##000000
##666DE9	1.00	4.26	4.93	4.93
#FFFFFF	4.26	1.00	21.00	21.00
#000000	4.93	21.00	1.00	1.00
##000000	4.93	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2080ED

Deuteranopia (green-blind)

#0075E6

Tritanopia (blue-blind)

#188AA1

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666de9;
/* rgb */ color: rgb(102, 109, 233);
/* oklch */ color: oklch(59.4% 0.184 276.8);

Tailwind

colors: {
  custom: {
    50: '#9c96f1',
    500: '#666de9',
    950: '#000000',
  },
}

SCSS

$custom: #666de9;
$custom-light: #9c96f1;
$custom-dark: #000000;

JSON

{
  "hex": "#666de9",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 233
  },
  "hsl": {
    "h": 236.794,
    "s": 74.857,
    "l": 65.686
  },
  "oklch": {
    "l": 0.59409,
    "c": 0.1841,
    "h": 276.8
  },
  "luminance": 0.19645
}

Semantic roles & 50–950 ramp

primary

#666DE9

secondary

#EBE9C0

accent

#CC0ED7

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DE9

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

Preview Lab → · Contrast checker → · Palette generator →