#666CCE#666CCE

#666CCE is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.4% C 0.148 H 278.0°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#666CCE
RGB	rgb(102, 108, 206)
HSL	hsl(237, 51%, 60%)
HSV	hsv(237, 50%, 81%)
CMYK	cmyk(50.5%, 47.6%, 0%, 19.2%)
CIE-LAB	lab(49.50, 24.56, -51.67)
CIE-LCH	lch(49.50, 57.21, 295.43°)
OKLab	oklab(57.42% 0.0206 -0.147)
OKLCH	oklch(57.42% 0.148 278)
XYZ	xyz(21.9792, 18.0048, 60.6977)
Luminance	0.1801 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CCE #CEC866

analogous

#66A0CE #666CCE #9466CE

triadic

#666CCE #CE666C #6CCE66

tetradic

#666CCE #CE66A0 #CEC866 #66CE94

square

#666CCE #CE66A0 #CEC866 #66CE94

split-complementary

#666CCE #CE9466 #A0CE66

monochromatic

#2D338D #3C43BB #666CCE #9499DD #C3C5EC

Accessibility & contrast

On white

4.56

#666CCE on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#666CCE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CCE

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CCE	#FFFFFF	#000000	##000000
##666CCE	1.00	4.56	4.60	4.60
#FFFFFF	4.56	1.00	21.00	21.00
#000000	4.60	21.00	1.00	1.00
##000000	4.60	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#407AD2

Deuteranopia (green-blind)

#3672CC

Tritanopia (blue-blind)

#3C8193

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666cce;
/* rgb */ color: rgb(102, 108, 206);
/* oklch */ color: oklch(57.4% 0.148 278.0);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#666cce",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 206
  },
  "hsl": {
    "h": 236.538,
    "s": 51.485,
    "l": 60.392
  },
  "oklch": {
    "l": 0.57418,
    "c": 0.14846,
    "h": 278
  },
  "luminance": 0.18006
}

Semantic roles & 50–950 ramp

primary

#666CCE

secondary

#DCD9B4

accent

#B627BF

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666CCE

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

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