#666BCC#666BCC

#666BCC is a mid, vivid blue. Relative luminance 0.177; OKLCH L 57.1% C 0.147 H 278.4°. Best body text is #FFFFFF at 4.63:1 contrast (WCAG AA passes).

Color values

HEX	#666BCC
RGB	rgb(102, 107, 204)
HSL	hsl(237, 50%, 60%)
HSV	hsv(237, 50%, 80%)
CMYK	cmyk(50%, 47.5%, 0%, 20%)
CIE-LAB	lab(49.13, 24.55, -51.12)
CIE-LCH	lch(49.13, 56.71, 295.65°)
OKLab	oklab(57.1% 0.0216 -0.1454)
OKLCH	oklch(57.1% 0.147 278.4)
XYZ	xyz(21.6329, 17.6986, 59.3913)
Luminance	0.1770 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BCC #CCC766

analogous

#669ECC #666BCC #9466CC

triadic

#666BCC #CC666B #6BCC66

tetradic

#666BCC #CC669E #CCC766 #66CC94

square

#666BCC #CC669E #CCC766 #66CC94

split-complementary

#666BCC #CC9466 #9ECC66

monochromatic

#2E328A #3D43B8 #666BCC #9497DB #C2C4EB

Accessibility & contrast

On white

4.63

#666BCC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.54

#666BCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666BCC

4.63:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BCC	#FFFFFF	#000000	##FFFFFF
##666BCC	1.00	4.63	4.54	4.63
#FFFFFF	4.63	1.00	21.00	1.00
#000000	4.54	21.00	1.00	21.00
##FFFFFF	4.63	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4079D0

Deuteranopia (green-blind)

#3771CA

Tritanopia (blue-blind)

#3E8092

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666bcc;
/* rgb */ color: rgb(102, 107, 204);
/* oklch */ color: oklch(57.1% 0.147 278.4);

Tailwind

colors: {
  custom: {
    50: '#9895dc',
    500: '#666bcc',
    950: '#000000',
  },
}

SCSS

$custom: #666bcc;
$custom-light: #9895dc;
$custom-dark: #000000;

JSON

{
  "hex": "#666bcc",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 204
  },
  "hsl": {
    "h": 237.059,
    "s": 50,
    "l": 60
  },
  "oklch": {
    "l": 0.57098,
    "c": 0.14701,
    "h": 278.4
  },
  "luminance": 0.177
}

Semantic roles & 50–950 ramp

primary

#666BCC

secondary

#DBD9B3

accent

#D34EDA

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666BCC

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

Preview Lab → · Contrast checker → · Palette generator →