#666CCB#666CCB

#666CCB is a mid, vivid blue. Relative luminance 0.179; OKLCH L 57.2% C 0.144 H 278.1°. Best body text is #FFFFFF at 4.59:1 contrast (WCAG AA passes).

Color values

HEX	#666CCB
RGB	rgb(102, 108, 203)
HSL	hsl(236, 49%, 60%)
HSV	hsv(236, 50%, 80%)
CMYK	cmyk(49.8%, 46.8%, 0%, 20.4%)
CIE-LAB	lab(49.33, 23.63, -50.23)
CIE-LCH	lch(49.33, 55.51, 295.19°)
OKLab	oklab(57.23% 0.0203 -0.1428)
OKLCH	oklch(57.23% 0.144 278.1)
XYZ	xyz(21.6182, 17.8605, 58.7966)
Luminance	0.1786 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CCB #CBC566

analogous

#669ECB #666CCB #9366CB

triadic

#666CCB #CB666C #6CCB66

tetradic

#666CCB #CB669E #CBC566 #66CB93

square

#666CCB #CB669E #CBC566 #66CB93

split-complementary

#666CCB #CB9366 #9ECB66

monochromatic

#2E3488 #3E45B6 #666CCB #9498DB #C1C4EA

Accessibility & contrast

On white

4.59

#666CCB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.57

#666CCB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#FFFFFF on #666CCB

4.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CCB	#FFFFFF	#000000	##FFFFFF
##666CCB	1.00	4.59	4.57	4.59
#FFFFFF	4.59	1.00	21.00	1.00
#000000	4.57	21.00	1.00	21.00
##FFFFFF	4.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#4379CE

Deuteranopia (green-blind)

#3A71C9

Tritanopia (blue-blind)

#3E8092

Achromatopsia (no color)

#757575

Design tokens & code

CSS

--color: #666ccb;
/* rgb */ color: rgb(102, 108, 203);
/* oklch */ color: oklch(57.2% 0.144 278.1);

Tailwind

colors: {
  custom: {
    50: '#9896db',
    500: '#666ccb',
    950: '#000000',
  },
}

SCSS

$custom: #666ccb;
$custom-light: #9896db;
$custom-dark: #000000;

JSON

{
  "hex": "#666ccb",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 203
  },
  "hsl": {
    "h": 236.436,
    "s": 49.268,
    "l": 59.804
  },
  "oklch": {
    "l": 0.57229,
    "c": 0.14424,
    "h": 278.1
  },
  "luminance": 0.17862
}

Semantic roles & 50–950 ramp

primary

#666CCB

secondary

#DAD8B3

accent

#D14FD9

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666CCB

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

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