#666FD6#666FD6

#666FD6 is a mid, vivid blue. Relative luminance 0.190; OKLCH L 58.5% C 0.156 H 276.7°. Best body text is #000000 at 4.81:1 contrast (WCAG AA passes).

Color values

HEX	#666FD6
RGB	rgb(102, 111, 214)
HSL	hsl(235, 58%, 62%)
HSV	hsv(235, 52%, 84%)
CMYK	cmyk(52.3%, 48.1%, 0%, 16.1%)
CIE-LAB	lab(50.74, 25.23, -54.23)
CIE-LCH	lch(50.74, 59.82, 294.95°)
OKLab	oklab(58.51% 0.0182 -0.1545)
OKLCH	oklch(58.51% 0.156 276.7)
XYZ	xyz(23.2977, 19.0472, 66.0541)
Luminance	0.1905 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FD6 #D6CD66

analogous

#66A7D6 #666FD6 #9566D6

triadic

#666FD6 #D6666F #6FD666

tetradic

#666FD6 #D666A7 #D6CD66 #66D695

square

#666FD6 #D666A7 #D6CD66 #66D695

split-complementary

#666FD6 #D69566 #A7D666

monochromatic

#293299 #3642C9 #666FD6 #969CE3 #C7CAF0

Accessibility & contrast

On white

4.37

#666FD6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.81

#666FD6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FD6

4.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FD6	#FFFFFF	#000000	##000000
##666FD6	1.00	4.37	4.81	4.81
#FFFFFF	4.37	1.00	21.00	21.00
#000000	4.81	21.00	1.00	1.00
##000000	4.81	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3F7EDA

Deuteranopia (green-blind)

#3274D4

Tritanopia (blue-blind)

#348698

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666fd6;
/* rgb */ color: rgb(102, 111, 214);
/* oklch */ color: oklch(58.5% 0.156 276.7);

Tailwind

colors: {
  custom: {
    50: '#9998e3',
    500: '#666fd6',
    950: '#000000',
  },
}

SCSS

$custom: #666fd6;
$custom-light: #9998e3;
$custom-dark: #000000;

JSON

{
  "hex": "#666fd6",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 214
  },
  "hsl": {
    "h": 235.179,
    "s": 57.732,
    "l": 61.961
  },
  "oklch": {
    "l": 0.5851,
    "c": 0.15559,
    "h": 276.7
  },
  "luminance": 0.19049
}

Semantic roles & 50–950 ramp

primary

#666FD6

secondary

#E1DDB7

accent

#B820C5

background

#F9F9FE

surface

#F2F2FC

border

#CCCCD5

text

#0E0D15

muted

#7E7E84

Preview Lab

Preview with #666FD6

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

Preview Lab → · Contrast checker → · Palette generator →