#666DD2#666DD2

#666DD2 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.9% C 0.153 H 277.5°. Best body text is #000000 at 4.68:1 contrast (WCAG AA passes).

Color values

HEX	#666DD2
RGB	rgb(102, 109, 210)
HSL	hsl(236, 55%, 61%)
HSV	hsv(236, 51%, 82%)
CMYK	cmyk(51.4%, 48.1%, 0%, 17.6%)
CIE-LAB	lab(49.99, 25.20, -53.16)
CIE-LCH	lch(49.99, 58.83, 295.36°)
OKLab	oklab(57.87% 0.02 -0.1514)
OKLCH	oklch(57.87% 0.153 277.5)
XYZ	xyz(22.5773, 18.4138, 63.3248)
Luminance	0.1842 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DD2 #D2CB66

analogous

#66A3D2 #666DD2 #9566D2

triadic

#666DD2 #D2666D #6DD266

tetradic

#666DD2 #D266A3 #D2CB66 #66D295

square

#666DD2 #D266A3 #D2CB66 #66D295

split-complementary

#666DD2 #D29566 #A3D266

monochromatic

#2B3293 #3942C2 #666DD2 #959AE0 #C5C7EE

Accessibility & contrast

On white

4.48

#666DD2 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.68

#666DD2 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DD2

4.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DD2	#FFFFFF	#000000	##000000
##666DD2	1.00	4.48	4.68	4.68
#FFFFFF	4.48	1.00	21.00	21.00
#000000	4.68	21.00	1.00	1.00
##000000	4.68	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7BD6

Deuteranopia (green-blind)

#3373D0

Tritanopia (blue-blind)

#388395

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666dd2;
/* rgb */ color: rgb(102, 109, 210);
/* oklch */ color: oklch(57.9% 0.153 277.5);

Tailwind

colors: {
  custom: {
    50: '#9996e0',
    500: '#666dd2',
    950: '#000000',
  },
}

SCSS

$custom: #666dd2;
$custom-light: #9996e0;
$custom-dark: #000000;

JSON

{
  "hex": "#666dd2",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 210
  },
  "hsl": {
    "h": 236.111,
    "s": 54.545,
    "l": 61.176
  },
  "oklch": {
    "l": 0.57867,
    "c": 0.1527,
    "h": 277.5
  },
  "luminance": 0.18415
}

Semantic roles & 50–950 ramp

primary

#666DD2

secondary

#DEDCB6

accent

#B823C2

background

#F9F9FD

surface

#F2F2FB

border

#CCCCD4

text

#0E0D15

muted

#7E7E83

Preview Lab

Preview with #666DD2

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

Preview Lab → · Contrast checker → · Palette generator →