#666BDE#666BDE

#666BDE is a mid, vivid blue. Relative luminance 0.186; OKLCH L 58.3% C 0.172 H 277.8°. Best body text is #000000 at 4.72:1 contrast (WCAG AA passes).

Color values

HEX	#666BDE
RGB	rgb(102, 107, 222)
HSL	hsl(238, 65%, 64%)
HSV	hsv(238, 54%, 87%)
CMYK	cmyk(54.1%, 51.8%, 0%, 12.9%)
CIE-LAB	lab(50.23, 30.19, -59.59)
CIE-LCH	lch(50.23, 66.80, 296.87°)
OKLab	oklab(58.28% 0.0232 -0.1703)
OKLCH	oklch(58.28% 0.172 277.8)
XYZ	xyz(23.9178, 18.6125, 71.4253)
Luminance	0.1861 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BDE #DED966

analogous

#66A7DE #666BDE #9D66DE

triadic

#666BDE #DE666B #6BDE66

tetradic

#666BDE #DE66A7 #DED966 #66DE9D

square

#666BDE #DE66A7 #DED966 #66DE9D

split-complementary

#666BDE #DE9D66 #A7DE66

monochromatic

#2429A6 #343AD3 #666BDE #989CE9 #CBCCF4

Accessibility & contrast

On white

4.45

#666BDE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.72

#666BDE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BDE

4.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BDE	#FFFFFF	#000000	##000000
##666BDE	1.00	4.45	4.72	4.72
#FFFFFF	4.45	1.00	21.00	21.00
#000000	4.72	21.00	1.00	1.00
##000000	4.72	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C7CE2

Deuteranopia (green-blind)

#1773DC

Tritanopia (blue-blind)

#2C859A

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666bde;
/* rgb */ color: rgb(102, 107, 222);
/* oklch */ color: oklch(58.3% 0.172 277.8);

Tailwind

colors: {
  custom: {
    50: '#9a95e9',
    500: '#666bde',
    950: '#000000',
  },
}

SCSS

$custom: #666bde;
$custom-light: #9a95e9;
$custom-dark: #000000;

JSON

{
  "hex": "#666bde",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 222
  },
  "hsl": {
    "h": 237.5,
    "s": 64.516,
    "l": 63.529
  },
  "oklch": {
    "l": 0.58282,
    "c": 0.17187,
    "h": 277.8
  },
  "luminance": 0.18614
}

Semantic roles & 50–950 ramp

primary

#666BDE

secondary

#E5E3BB

accent

#C519CC

background

#FAF9FE

surface

#F3F1FD

border

#CDCBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666BDE

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

Preview Lab → · Contrast checker → · Palette generator →