#666DDE#666DDE

#666DDE is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.7% C 0.169 H 277.2°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#666DDE
RGB	rgb(102, 109, 222)
HSL	hsl(237, 65%, 64%)
HSV	hsv(237, 54%, 87%)
CMYK	cmyk(54.1%, 50.9%, 0%, 12.9%)
CIE-LAB	lab(50.73, 28.98, -58.79)
CIE-LCH	lch(50.73, 65.54, 296.24°)
OKLab	oklab(58.66% 0.0211 -0.1679)
OKLCH	oklch(58.66% 0.169 277.2)
XYZ	xyz(24.1288, 19.0344, 71.4956)
Luminance	0.1904 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DDE #DED766

analogous

#66A9DE #666DDE #9B66DE

triadic

#666DDE #DE666D #6DDE66

tetradic

#666DDE #DE66A9 #DED766 #66DE9B

square

#666DDE #DE66A9 #DED766 #66DE9B

split-complementary

#666DDE #DE9B66 #A9DE66

monochromatic

#242BA6 #343DD3 #666DDE #989DE9 #CBCDF4

Accessibility & contrast

On white

4.37

#666DDE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#666DDE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DDE

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DDE	#FFFFFF	#000000	##000000
##666DDE	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#327EE2

Deuteranopia (green-blind)

#1F74DC

Tritanopia (blue-blind)

#2B869B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666dde;
/* rgb */ color: rgb(102, 109, 222);
/* oklch */ color: oklch(58.7% 0.169 277.2);

Tailwind

colors: {
  custom: {
    50: '#9a96e9',
    500: '#666dde',
    950: '#000000',
  },
}

SCSS

$custom: #666dde;
$custom-light: #9a96e9;
$custom-dark: #000000;

JSON

{
  "hex": "#666dde",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 222
  },
  "hsl": {
    "h": 236.5,
    "s": 64.516,
    "l": 63.529
  },
  "oklch": {
    "l": 0.58656,
    "c": 0.16925,
    "h": 277.2
  },
  "luminance": 0.19036
}

Semantic roles & 50–950 ramp

primary

#666DDE

secondary

#E5E3BB

accent

#C219CC

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666DDE

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

Preview Lab → · Contrast checker → · Palette generator →