#666BCD#666BCD

#666BCD is a mid, vivid blue. Relative luminance 0.177; OKLCH L 57.2% C 0.148 H 278.4°. Best body text is #FFFFFF at 4.62:1 contrast (WCAG AA passes).

Color values

HEX	#666BCD
RGB	rgb(102, 107, 205)
HSL	hsl(237, 51%, 60%)
HSV	hsv(237, 50%, 80%)
CMYK	cmyk(50.2%, 47.8%, 0%, 19.6%)
CIE-LAB	lab(49.19, 24.86, -51.60)
CIE-LCH	lch(49.19, 57.28, 295.73°)
OKLab	oklab(57.16% 0.0217 -0.1468)
OKLCH	oklch(57.16% 0.148 278.4)
XYZ	xyz(21.7532, 17.7467, 60.0250)
Luminance	0.1775 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BCD #CDC866

analogous

#669FCD #666BCD #9466CD

triadic

#666BCD #CD666B #6BCD66

tetradic

#666BCD #CD669F #CDC866 #66CD94

square

#666BCD #CD669F #CDC866 #66CD94

split-complementary

#666BCD #CD9466 #9FCD66

monochromatic

#2D328B #3D43B9 #666BCD #9498DC #C2C4EB

Accessibility & contrast

On white

4.62

#666BCD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.55

#666BCD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666BCD

4.62:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BCD	#FFFFFF	#000000	##FFFFFF
##666BCD	1.00	4.62	4.55	4.62
#FFFFFF	4.62	1.00	21.00	1.00
#000000	4.55	21.00	1.00	21.00
##FFFFFF	4.62	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F79D1

Deuteranopia (green-blind)

#3571CB

Tritanopia (blue-blind)

#3D8092

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666bcd;
/* rgb */ color: rgb(102, 107, 205);
/* oklch */ color: oklch(57.2% 0.148 278.4);

Tailwind

colors: {
  custom: {
    50: '#9895dd',
    500: '#666bcd',
    950: '#000000',
  },
}

SCSS

$custom: #666bcd;
$custom-light: #9895dd;
$custom-dark: #000000;

JSON

{
  "hex": "#666bcd",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 205
  },
  "hsl": {
    "h": 237.087,
    "s": 50.739,
    "l": 60.196
  },
  "oklch": {
    "l": 0.57161,
    "c": 0.14841,
    "h": 278.4
  },
  "luminance": 0.17748
}

Semantic roles & 50–950 ramp

primary

#666BCD

secondary

#DBD9B4

accent

#B727BE

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666BCD

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

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