#666BD2#666BD2

#666BD2 is a mid, vivid blue. Relative luminance 0.180; OKLCH L 57.5% C 0.155 H 278.2°. Best body text is #000000 at 4.60:1 contrast (WCAG AA passes).

Color values

HEX	#666BD2
RGB	rgb(102, 107, 210)
HSL	hsl(237, 55%, 61%)
HSV	hsv(237, 51%, 82%)
CMYK	cmyk(51.4%, 49%, 0%, 17.6%)
CIE-LAB	lab(49.49, 26.42, -53.97)
CIE-LCH	lch(49.49, 60.09, 296.08°)
OKLab	oklab(57.48% 0.0222 -0.1538)
OKLCH	oklch(57.48% 0.155 278.2)
XYZ	xyz(22.3664, 17.9920, 63.2545)
Luminance	0.1799 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BD2 #D2CD66

analogous

#66A1D2 #666BD2 #9766D2

triadic

#666BD2 #D2666B #6BD266

tetradic

#666BD2 #D266A1 #D2CD66 #66D297

square

#666BD2 #D266A1 #D2CD66 #66D297

split-complementary

#666BD2 #D29766 #A1D266

monochromatic

#2B3093 #393FC2 #666BD2 #9599E0 #C5C6EE

Accessibility & contrast

On white

4.57

#666BD2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.60

#666BD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BD2

4.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BD2	#FFFFFF	#000000	##000000
##666BD2	1.00	4.57	4.60	4.60
#FFFFFF	4.57	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)

#3A7AD6

Deuteranopia (green-blind)

#2F71D0

Tritanopia (blue-blind)

#398294

Achromatopsia (no color)

#767676

Design tokens & code

CSS

--color: #666bd2;
/* rgb */ color: rgb(102, 107, 210);
/* oklch */ color: oklch(57.5% 0.155 278.2);

Tailwind

colors: {
  custom: {
    50: '#9995e0',
    500: '#666bd2',
    950: '#000000',
  },
}

SCSS

$custom: #666bd2;
$custom-light: #9995e0;
$custom-dark: #000000;

JSON

{
  "hex": "#666bd2",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 210
  },
  "hsl": {
    "h": 237.222,
    "s": 54.545,
    "l": 61.176
  },
  "oklch": {
    "l": 0.57483,
    "c": 0.1554,
    "h": 278.2
  },
  "luminance": 0.17993
}

Semantic roles & 50–950 ramp

primary

#666BD2

secondary

#DEDCB6

accent

#BB23C2

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666BD2

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

Preview Lab → · Contrast checker → · Palette generator →