#666ECC#666ECC

#666ECC is a mid, vivid blue. Relative luminance 0.183; OKLCH L 57.7% C 0.143 H 277.3°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#666ECC
RGB	rgb(102, 110, 204)
HSL	hsl(235, 50%, 60%)
HSV	hsv(235, 50%, 80%)
CMYK	cmyk(50%, 46.1%, 0%, 20%)
CIE-LAB	lab(49.90, 22.72, -49.89)
CIE-LCH	lch(49.90, 54.82, 294.48°)
OKLab	oklab(57.68% 0.0181 -0.1418)
OKLCH	oklch(57.68% 0.143 277.3)
XYZ	xyz(21.9511, 18.3350, 59.4974)
Luminance	0.1834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666ECC #CCC466

analogous

#66A1CC #666ECC #9166CC

triadic

#666ECC #CC666E #6ECC66

tetradic

#666ECC #CC66A1 #CCC466 #66CC91

square

#666ECC #CC66A1 #CCC466 #66CC91

split-complementary

#666ECC #CC9166 #A1CC66

monochromatic

#2E358A #3D47B8 #666ECC #949ADB #C2C5EB

Accessibility & contrast

On white

4.50

#666ECC on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#666ECC on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666ECC

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666ECC	#FFFFFF	#000000	##000000
##666ECC	1.00	4.50	4.67	4.67
#FFFFFF	4.50	1.00	21.00	21.00
#000000	4.67	21.00	1.00	1.00
##000000	4.67	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#467BCF

Deuteranopia (green-blind)

#3C73CA

Tritanopia (blue-blind)

#3D8293

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666ecc;
/* rgb */ color: rgb(102, 110, 204);
/* oklch */ color: oklch(57.7% 0.143 277.3);

Tailwind

colors: {
  custom: {
    50: '#9897dc',
    500: '#666ecc',
    950: '#000000',
  },
}

SCSS

$custom: #666ecc;
$custom-light: #9897dc;
$custom-dark: #000000;

JSON

{
  "hex": "#666ecc",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 204
  },
  "hsl": {
    "h": 235.294,
    "s": 50,
    "l": 60
  },
  "oklch": {
    "l": 0.57682,
    "c": 0.14293,
    "h": 277.3
  },
  "luminance": 0.18336
}

Semantic roles & 50–950 ramp

primary

#666ECC

secondary

#DBD7B3

accent

#CF4EDA

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666ECC

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

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