#666DEF#666DEF

#666DEF is a mid, vivid blue. Relative luminance 0.200; OKLCH L 59.8% C 0.192 H 276.6°. Best body text is #000000 at 5.00:1 contrast (WCAG AA passes).

Color values

HEX	#666DEF
RGB	rgb(102, 109, 239)
HSL	hsl(237, 81%, 67%)
HSV	hsv(237, 57%, 94%)
CMYK	cmyk(57.3%, 54.4%, 0%, 6.3%)
CIE-LAB	lab(51.83, 34.37, -66.56)
CIE-LCH	lch(51.83, 74.91, 297.31°)
OKLab	oklab(59.83% 0.022 -0.1908)
OKLCH	oklch(59.83% 0.192 276.6)
XYZ	xyz(26.5231, 19.9921, 84.1058)
Luminance	0.1999 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DEF #EFE866

analogous

#66B2EF #666DEF #A466EF

triadic

#666DEF #EF666D #6DEF66

tetradic

#666DEF #EF66B2 #EFE866 #66EFA4

square

#666DEF #EF66B2 #EFE866 #66EFA4

split-complementary

#666DEF #EFA466 #B2EF66

monochromatic

#151EC6 #2F38E9 #666DEF #9DA2F5 #D5D7FB

Accessibility & contrast

On white

4.20

#666DEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.00

#666DEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DEF

5.00:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DEF	#FFFFFF	#000000	##000000
##666DEF	1.00	4.20	5.00	5.00
#FFFFFF	4.20	1.00	21.00	21.00
#000000	5.00	21.00	1.00	1.00
##000000	5.00	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0E81F3

Deuteranopia (green-blind)

#0076EC

Tritanopia (blue-blind)

#038BA3

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666def;
/* rgb */ color: rgb(102, 109, 239);
/* oklch */ color: oklch(59.8% 0.192 276.6);

Tailwind

colors: {
  custom: {
    50: '#9d96f5',
    500: '#666def',
    950: '#000000',
  },
}

SCSS

$custom: #666def;
$custom-light: #9d96f5;
$custom-dark: #000000;

JSON

{
  "hex": "#666def",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 239
  },
  "hsl": {
    "h": 236.934,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.59832,
    "c": 0.19207,
    "h": 276.6
  },
  "luminance": 0.19994
}

Semantic roles & 50–950 ramp

primary

#666DEF

secondary

#EEECC2

accent

#D308DD

background

#FAF9FF

surface

#F4F2FE

border

#CECCD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DEF

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

Preview Lab → · Contrast checker → · Palette generator →