#666BEF#666BEF

#666BEF is a mid, vivid blue. Relative luminance 0.196; OKLCH L 59.5% C 0.195 H 277.1°. Best body text is #000000 at 4.91:1 contrast (WCAG AA passes).

Color values

HEX	#666BEF
RGB	rgb(102, 107, 239)
HSL	hsl(238, 81%, 67%)
HSV	hsv(238, 57%, 94%)
CMYK	cmyk(57.3%, 55.2%, 0%, 6.3%)
CIE-LAB	lab(51.35, 35.58, -67.34)
CIE-LCH	lch(51.35, 76.16, 297.85°)
OKLab	oklab(59.47% 0.024 -0.1931)
OKLCH	oklch(59.47% 0.195 277.1)
XYZ	xyz(26.3122, 19.5703, 84.0355)
Luminance	0.1957 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BEF #EFEA66

analogous

#66B0EF #666BEF #A666EF

triadic

#666BEF #EF666B #6BEF66

tetradic

#666BEF #EF66B0 #EFEA66 #66EFA6

square

#666BEF #EF66B0 #EFEA66 #66EFA6

split-complementary

#666BEF #EFA666 #B0EF66

monochromatic

#151BC6 #2F35E9 #666BEF #9DA1F5 #D5D6FB

Accessibility & contrast

On white

4.27

#666BEF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.91

#666BEF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BEF

4.91:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BEF	#FFFFFF	#000000	##000000
##666BEF	1.00	4.27	4.91	4.91
#FFFFFF	4.27	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)

#0080F3

Deuteranopia (green-blind)

#0075EC

Tritanopia (blue-blind)

#048AA3

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666bef;
/* rgb */ color: rgb(102, 107, 239);
/* oklch */ color: oklch(59.5% 0.195 277.1);

Tailwind

colors: {
  custom: {
    50: '#9d95f5',
    500: '#666bef',
    950: '#000000',
  },
}

SCSS

$custom: #666bef;
$custom-light: #9d95f5;
$custom-dark: #000000;

JSON

{
  "hex": "#666bef",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 239
  },
  "hsl": {
    "h": 237.81,
    "s": 81.065,
    "l": 66.863
  },
  "oklch": {
    "l": 0.59474,
    "c": 0.19459,
    "h": 277.1
  },
  "luminance": 0.19572
}

Semantic roles & 50–950 ramp

primary

#666BEF

secondary

#EEEDC2

accent

#D608DD

background

#FAF9FF

surface

#F4F1FE

border

#CECBD6

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666BEF

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

Preview Lab → · Contrast checker → · Palette generator →