#666CD5#666CD5

#666CD5 is a mid, vivid blue. Relative luminance 0.184; OKLCH L 57.9% C 0.158 H 277.8°. Best body text is #000000 at 4.67:1 contrast (WCAG AA passes).

Color values

HEX	#666CD5
RGB	rgb(102, 108, 213)
HSL	hsl(237, 57%, 62%)
HSV	hsv(237, 52%, 84%)
CMYK	cmyk(52.1%, 49.3%, 0%, 16.5%)
CIE-LAB	lab(49.92, 26.75, -54.98)
CIE-LCH	lch(49.92, 61.15, 295.94°)
OKLab	oklab(57.87% 0.0214 -0.1568)
OKLCH	oklch(57.87% 0.158 277.8)
XYZ	xyz(22.8485, 18.3526, 65.2763)
Luminance	0.1835 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CD5 #D5CF66

analogous

#66A4D5 #666CD5 #9866D5

triadic

#666CD5 #D5666C #6CD566

tetradic

#666CD5 #D566A4 #D5CF66 #66D598

square

#666CD5 #D566A4 #D5CF66 #66D598

split-complementary

#666CD5 #D59866 #A4D566

monochromatic

#292F97 #373EC7 #666CD5 #969AE2 #C6C8EF

Accessibility & contrast

On white

4.50

#666CD5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

4.67

#666CD5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CD5

4.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CD5	#FFFFFF	#000000	##000000
##666CD5	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)

#3A7BD9

Deuteranopia (green-blind)

#2D72D3

Tritanopia (blue-blind)

#368396

Achromatopsia (no color)

#777777

Design tokens & code

CSS

--color: #666cd5;
/* rgb */ color: rgb(102, 108, 213);
/* oklch */ color: oklch(57.9% 0.158 277.8);

Tailwind

colors: {
  custom: {
    50: '#9996e2',
    500: '#666cd5',
    950: '#000000',
  },
}

SCSS

$custom: #666cd5;
$custom-light: #9996e2;
$custom-dark: #000000;

JSON

{
  "hex": "#666cd5",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 213
  },
  "hsl": {
    "h": 236.757,
    "s": 56.923,
    "l": 61.765
  },
  "oklch": {
    "l": 0.5787,
    "c": 0.15821,
    "h": 277.8
  },
  "luminance": 0.18354
}

Semantic roles & 50–950 ramp

primary

#666CD5

secondary

#E0DEB7

accent

#BC21C4

background

#F9F9FD

surface

#F2F1FB

border

#CCCBD4

text

#0F0D15

muted

#7E7E83

Preview Lab

Preview with #666CD5

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

Preview Lab → · Contrast checker → · Palette generator →