#666DCD#666DCD

#666DCD is a mid, vivid blue. Relative luminance 0.182; OKLCH L 57.5% C 0.146 H 277.6°. Best body text is #000000 at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#666DCD
RGB	rgb(102, 109, 205)
HSL	hsl(236, 51%, 60%)
HSV	hsv(236, 50%, 80%)
CMYK	cmyk(50.2%, 46.8%, 0%, 19.6%)
CIE-LAB	lab(49.70, 23.64, -50.78)
CIE-LCH	lch(49.70, 56.01, 294.96°)
OKLab	oklab(57.55% 0.0194 -0.1444)
OKLCH	oklch(57.55% 0.146 277.6)
XYZ	xyz(21.9641, 18.1685, 60.0953)
Luminance	0.1817 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DCD #CDC666

analogous

#66A1CD #666DCD #9266CD

triadic

#666DCD #CD666D #6DCD66

tetradic

#666DCD #CD66A1 #CDC666 #66CD92

square

#666DCD #CD66A1 #CDC666 #66CD92

split-complementary

#666DCD #CD9266 #A1CD66

monochromatic

#2D348B #3D45B9 #666DCD #9499DC #C2C5EB

Accessibility & contrast

On white

4.53

#666DCD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.63

#666DCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DCD

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DCD	#FFFFFF	#000000	##000000
##666DCD	1.00	4.53	4.63	4.63
#FFFFFF	4.53	1.00	21.00	21.00
#000000	4.63	21.00	1.00	1.00
##000000	4.63	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#437AD1

Deuteranopia (green-blind)

#3972CB

Tritanopia (blue-blind)

#3D8293

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666dcd;
/* rgb */ color: rgb(102, 109, 205);
/* oklch */ color: oklch(57.5% 0.146 277.6);

Tailwind

colors: {
  custom: {
    50: '#9896dd',
    500: '#666dcd',
    950: '#000000',
  },
}

SCSS

$custom: #666dcd;
$custom-light: #9896dd;
$custom-dark: #000000;

JSON

{
  "hex": "#666dcd",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 205
  },
  "hsl": {
    "h": 235.922,
    "s": 50.739,
    "l": 60.196
  },
  "oklch": {
    "l": 0.57549,
    "c": 0.14569,
    "h": 277.6
  },
  "luminance": 0.1817
}

Semantic roles & 50–950 ramp

primary

#666DCD

secondary

#DBD8B4

accent

#B427BE

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666DCD

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

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