#666DE7#666DE7

#666DE7 is a mid, vivid blue. Relative luminance 0.195; OKLCH L 59.3% C 0.181 H 276.9°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#666DE7
RGB	rgb(102, 109, 231)
HSL	hsl(237, 73%, 65%)
HSV	hsv(237, 56%, 91%)
CMYK	cmyk(55.8%, 52.8%, 0%, 9.4%)
CIE-LAB	lab(51.30, 31.83, -62.93)
CIE-LCH	lch(51.30, 70.52, 296.83°)
OKLab	oklab(59.27% 0.0217 -0.1801)
OKLCH	oklch(59.27% 0.181 276.9)
XYZ	xyz(25.3673, 19.5298, 78.0187)
Luminance	0.1953 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DE7 #E7E066

analogous

#66AEE7 #666DE7 #9F66E7

triadic

#666DE7 #E7666D #6DE766

tetradic

#666DE7 #E766AE #E7E066 #66E79F

square

#666DE7 #E766AE #E7E066 #66E79F

split-complementary

#666DE7 #E79F66 #AEE766

monochromatic

#1D25B6 #313BDF #666DE7 #9B9FEF #D0D2F8

Accessibility & contrast

On white

4.28

#666DE7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#666DE7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DE7

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DE7	#FFFFFF	#000000	##000000
##666DE7	1.00	4.28	4.91	4.91
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.91	21.00	1.00	1.00
##000000	4.91	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2480EB

Deuteranopia (green-blind)

#0075E4

Tritanopia (blue-blind)

#1D89A0

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666de7;
/* rgb */ color: rgb(102, 109, 231);
/* oklch */ color: oklch(59.3% 0.181 276.9);

Tailwind

colors: {
  custom: {
    50: '#9c96ef',
    500: '#666de7',
    950: '#000000',
  },
}

SCSS

$custom: #666de7;
$custom-light: #9c96ef;
$custom-dark: #000000;

JSON

{
  "hex": "#666de7",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 231
  },
  "hsl": {
    "h": 236.744,
    "s": 72.881,
    "l": 65.294
  },
  "oklch": {
    "l": 0.5927,
    "c": 0.18142,
    "h": 276.9
  },
  "luminance": 0.19532
}

Semantic roles & 50–950 ramp

primary

#666DE7

secondary

#EAE8BF

accent

#CA11D5

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DE7

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

Preview Lab → · Contrast checker → · Palette generator →