#666FCC#666FCC

#666FCC is a mid, vivid blue. Relative luminance 0.186; OKLCH L 57.9% C 0.142 H 276.9°. Best body text is #000000 at 4.71:1 contrast (WCAG AA passes).

Color values

HEX	#666FCC
RGB	rgb(102, 111, 204)
HSL	hsl(235, 50%, 60%)
HSV	hsv(235, 50%, 80%)
CMYK	cmyk(50%, 45.6%, 0%, 20%)
CIE-LAB	lab(50.16, 22.10, -49.48)
CIE-LCH	lch(50.16, 54.19, 294.07°)
OKLab	oklab(57.88% 0.0169 -0.1406)
OKLCH	oklch(57.88% 0.142 276.9)
XYZ	xyz(22.0596, 18.5520, 59.5335)
Luminance	0.1855 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FCC #CCC366

analogous

#66A2CC #666FCC #9066CC

triadic

#666FCC #CC666F #6FCC66

tetradic

#666FCC #CC66A2 #CCC366 #66CC90

square

#666FCC #CC66A2 #CCC366 #66CC90

split-complementary

#666FCC #CC9066 #A2CC66

monochromatic

#2E368A #3D48B8 #666FCC #949ADB #C2C5EB

Accessibility & contrast

On white

4.46

#666FCC on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.71

#666FCC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FCC

4.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FCC	#FFFFFF	#000000	##000000
##666FCC	1.00	4.46	4.71	4.71
#FFFFFF	4.46	1.00	21.00	21.00
#000000	4.71	21.00	1.00	1.00
##000000	4.71	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#477CCF

Deuteranopia (green-blind)

#3E73CA

Tritanopia (blue-blind)

#3D8394

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666fcc;
/* rgb */ color: rgb(102, 111, 204);
/* oklch */ color: oklch(57.9% 0.142 276.9);

Tailwind

colors: {
  custom: {
    50: '#9898dc',
    500: '#666fcc',
    950: '#000000',
  },
}

SCSS

$custom: #666fcc;
$custom-light: #9898dc;
$custom-dark: #000000;

JSON

{
  "hex": "#666fcc",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 204
  },
  "hsl": {
    "h": 234.706,
    "s": 50,
    "l": 60
  },
  "oklch": {
    "l": 0.57879,
    "c": 0.14157,
    "h": 276.9
  },
  "luminance": 0.18553
}

Semantic roles & 50–950 ramp

primary

#666FCC

secondary

#DBD7B3

accent

#CD4EDA

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666FCC

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

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