#666FDF#666FDF

#666FDF is a mid, vivid blue. Relative luminance 0.195; OKLCH L 59.1% C 0.168 H 276.5°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#666FDF
RGB	rgb(102, 111, 223)
HSL	hsl(236, 65%, 64%)
HSV	hsv(236, 54%, 87%)
CMYK	cmyk(54.3%, 50.2%, 0%, 12.5%)
CIE-LAB	lab(51.29, 28.08, -58.45)
CIE-LCH	lch(51.29, 64.84, 295.66°)
OKLab	oklab(59.1% 0.019 -0.1669)
OKLCH	oklch(59.1% 0.168 276.5)
XYZ	xyz(24.4790, 19.5197, 72.2755)
Luminance	0.1952 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FDF #DFD666

analogous

#66ABDF #666FDF #9966DF

triadic

#666FDF #DF666F #6FDF66

tetradic

#666FDF #DF66AB #DFD666 #66DF99

square

#666FDF #DF66AB #DFD666 #66DF99

split-complementary

#666FDF #DF9966 #ABDF66

monochromatic

#232DA8 #333FD4 #666FDF #999FEA #CBCEF4

Accessibility & contrast

On white

4.28

#666FDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#666FDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FDF

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FDF	#FFFFFF	#000000	##000000
##666FDF	1.00	4.28	4.90	4.90
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#367FE3

Deuteranopia (green-blind)

#2475DD

Tritanopia (blue-blind)

#2A889C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666fdf;
/* rgb */ color: rgb(102, 111, 223);
/* oklch */ color: oklch(59.1% 0.168 276.5);

Tailwind

colors: {
  custom: {
    50: '#9a98ea',
    500: '#666fdf',
    950: '#000000',
  },
}

SCSS

$custom: #666fdf;
$custom-light: #9a98ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666fdf",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 223
  },
  "hsl": {
    "h": 235.537,
    "s": 65.405,
    "l": 63.725
  },
  "oklch": {
    "l": 0.59099,
    "c": 0.168,
    "h": 276.5
  },
  "luminance": 0.19521
}

Semantic roles & 50–950 ramp

primary

#666FDF

secondary

#E6E3BB

accent

#C018CD

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666FDF

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

Preview Lab → · Contrast checker → · Palette generator →