#666FE0#666FE0

#666FE0 is a mid, vivid blue. Relative luminance 0.196; OKLCH L 59.2% C 0.169 H 276.5°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#666FE0
RGB	rgb(102, 111, 224)
HSL	hsl(236, 66%, 64%)
HSV	hsv(236, 54%, 88%)
CMYK	cmyk(54.5%, 50.4%, 0%, 12.2%)
CIE-LAB	lab(51.35, 28.39, -58.91)
CIE-LCH	lch(51.35, 65.40, 295.73°)
OKLab	oklab(59.17% 0.0191 -0.1683)
OKLCH	oklch(59.17% 0.169 276.5)
XYZ	xyz(24.6142, 19.5738, 72.9876)
Luminance	0.1958 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FE0 #E0D766

analogous

#66ACE0 #666FE0 #9A66E0

triadic

#666FE0 #E0666F #6FE066

tetradic

#666FE0 #E066AC #E0D766 #66E09A

square

#666FE0 #E066AC #E0D766 #66E09A

split-complementary

#666FE0 #E09A66 #ACE066

monochromatic

#222CA9 #333FD6 #666FE0 #999FEA #CCCFF5

Accessibility & contrast

On white

4.27

#666FE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#666FE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FE0

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FE0	#FFFFFF	#000000	##000000
##666FE0	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#3480E4

Deuteranopia (green-blind)

#2275DE

Tritanopia (blue-blind)

#28889D

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666fe0;
/* rgb */ color: rgb(102, 111, 224);
/* oklch */ color: oklch(59.2% 0.169 276.5);

Tailwind

colors: {
  custom: {
    50: '#9a98ea',
    500: '#666fe0',
    950: '#000000',
  },
}

SCSS

$custom: #666fe0;
$custom-light: #9a98ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666fe0",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 224
  },
  "hsl": {
    "h": 235.574,
    "s": 66.304,
    "l": 63.922
  },
  "oklch": {
    "l": 0.59166,
    "c": 0.16936,
    "h": 276.5
  },
  "luminance": 0.19575
}

Semantic roles & 50–950 ramp

primary

#666FE0

secondary

#E6E3BC

accent

#C117CE

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666FE0

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

Preview Lab → · Contrast checker → · Palette generator →