#666BDF#666BDF

#666BDF is a mid, vivid blue. Relative luminance 0.187; OKLCH L 58.4% C 0.173 H 277.7°. Best body text is #000000 at 4.73:1 contrast (WCAG AA passes).

Color values

HEX	#666BDF
RGB	rgb(102, 107, 223)
HSL	hsl(238, 65%, 64%)
HSV	hsv(238, 54%, 87%)
CMYK	cmyk(54.3%, 52%, 0%, 12.5%)
CIE-LAB	lab(50.29, 30.51, -60.05)
CIE-LCH	lch(50.29, 67.35, 296.93°)
OKLab	oklab(58.35% 0.0233 -0.1717)
OKLCH	oklch(58.35% 0.173 277.7)
XYZ	xyz(24.0523, 18.6663, 72.1333)
Luminance	0.1867 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BDF #DFDA66

analogous

#66A7DF #666BDF #9D66DF

triadic

#666BDF #DF666B #6BDF66

tetradic

#666BDF #DF66A7 #DFDA66 #66DF9D

square

#666BDF #DF66A7 #DFDA66 #66DF9D

split-complementary

#666BDF #DF9D66 #A7DF66

monochromatic

#2329A8 #333AD4 #666BDF #999CEA #CBCDF4

Accessibility & contrast

On white

4.44

#666BDF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.73

#666BDF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BDF

4.73:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BDF	#FFFFFF	#000000	##000000
##666BDF	1.00	4.44	4.73	4.73
#FFFFFF	4.44	1.00	21.00	21.00
#000000	4.73	21.00	1.00	1.00
##000000	4.73	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2B7DE3

Deuteranopia (green-blind)

#1473DD

Tritanopia (blue-blind)

#2A859B

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666bdf;
/* rgb */ color: rgb(102, 107, 223);
/* oklch */ color: oklch(58.4% 0.173 277.7);

Tailwind

colors: {
  custom: {
    50: '#9a95ea',
    500: '#666bdf',
    950: '#000000',
  },
}

SCSS

$custom: #666bdf;
$custom-light: #9a95ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666bdf",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 223
  },
  "hsl": {
    "h": 237.521,
    "s": 65.405,
    "l": 63.725
  },
  "oklch": {
    "l": 0.58351,
    "c": 0.17323,
    "h": 277.7
  },
  "luminance": 0.18668
}

Semantic roles & 50–950 ramp

primary

#666BDF

secondary

#E6E4BB

accent

#C618CD

background

#FAF9FE

surface

#F3F1FD

border

#CDCBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666BDF

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

Preview Lab → · Contrast checker → · Palette generator →