#666DE0#666DE0

#666DE0 is a mid, vivid blue. Relative luminance 0.191; OKLCH L 58.8% C 0.172 H 277.1°. Best body text is #000000 at 4.83:1 contrast (WCAG AA passes).

Color values

HEX	#666DE0
RGB	rgb(102, 109, 224)
HSL	hsl(237, 66%, 64%)
HSV	hsv(237, 54%, 88%)
CMYK	cmyk(54.5%, 51.3%, 0%, 12.2%)
CIE-LAB	lab(50.85, 29.61, -59.71)
CIE-LCH	lch(50.85, 66.65, 296.37°)
OKLab	oklab(58.79% 0.0212 -0.1707)
OKLCH	oklch(58.79% 0.172 277.1)
XYZ	xyz(24.3984, 19.1423, 72.9157)
Luminance	0.1914 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DE0 #E0D966

analogous

#66AAE0 #666DE0 #9C66E0

triadic

#666DE0 #E0666D #6DE066

tetradic

#666DE0 #E066AA #E0D966 #66E09C

square

#666DE0 #E066AA #E0D966 #66E09C

split-complementary

#666DE0 #E09C66 #AAE066

monochromatic

#222AA9 #333CD6 #666DE0 #999EEA #CCCEF5

Accessibility & contrast

On white

4.35

#666DE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.83

#666DE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DE0

4.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DE0	#FFFFFF	#000000	##000000
##666DE0	1.00	4.35	4.83	4.83
#FFFFFF	4.35	1.00	21.00	21.00
#000000	4.83	21.00	1.00	1.00
##000000	4.83	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F7EE4

Deuteranopia (green-blind)

#1A74DE

Tritanopia (blue-blind)

#29879C

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666de0;
/* rgb */ color: rgb(102, 109, 224);
/* oklch */ color: oklch(58.8% 0.172 277.1);

Tailwind

colors: {
  custom: {
    50: '#9b96ea',
    500: '#666de0',
    950: '#000000',
  },
}

SCSS

$custom: #666de0;
$custom-light: #9b96ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666de0",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 224
  },
  "hsl": {
    "h": 236.557,
    "s": 66.304,
    "l": 63.922
  },
  "oklch": {
    "l": 0.5879,
    "c": 0.17198,
    "h": 277.1
  },
  "luminance": 0.19144
}

Semantic roles & 50–950 ramp

primary

#666DE0

secondary

#E6E4BC

accent

#C417CE

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666DE0

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

Preview Lab → · Contrast checker → · Palette generator →