#666FDE#666FDE

#666FDE is a mid, vivid blue. Relative luminance 0.195; OKLCH L 59.0% C 0.167 H 276.5°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#666FDE
RGB	rgb(102, 111, 222)
HSL	hsl(236, 65%, 64%)
HSV	hsv(236, 54%, 87%)
CMYK	cmyk(54.1%, 50%, 0%, 12.9%)
CIE-LAB	lab(51.23, 27.76, -57.98)
CIE-LCH	lch(51.23, 64.28, 295.58°)
OKLab	oklab(59.03% 0.019 -0.1655)
OKLCH	oklch(59.03% 0.167 276.5)
XYZ	xyz(24.3445, 19.4660, 71.5676)
Luminance	0.1947 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FDE #DED566

analogous

#66ABDE #666FDE #9966DE

triadic

#666FDE #DE666F #6FDE66

tetradic

#666FDE #DE66AB #DED566 #66DE99

square

#666FDE #DE66AB #DED566 #66DE99

split-complementary

#666FDE #DE9966 #ABDE66

monochromatic

#242EA6 #3440D3 #666FDE #989EE9 #CBCEF4

Accessibility & contrast

On white

4.29

#666FDE on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#666FDE on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FDE

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FDE	#FFFFFF	#000000	##000000
##666FDE	1.00	4.29	4.89	4.89
#FFFFFF	4.29	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#377FE2

Deuteranopia (green-blind)

#2675DC

Tritanopia (blue-blind)

#2B889C

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666fde;
/* rgb */ color: rgb(102, 111, 222);
/* oklch */ color: oklch(59.0% 0.167 276.5);

Tailwind

colors: {
  custom: {
    50: '#9a98e9',
    500: '#666fde',
    950: '#000000',
  },
}

SCSS

$custom: #666fde;
$custom-light: #9a98e9;
$custom-dark: #000000;

JSON

{
  "hex": "#666fde",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 222
  },
  "hsl": {
    "h": 235.5,
    "s": 64.516,
    "l": 63.529
  },
  "oklch": {
    "l": 0.59032,
    "c": 0.16663,
    "h": 276.5
  },
  "luminance": 0.19468
}

Semantic roles & 50–950 ramp

primary

#666FDE

secondary

#E5E2BB

accent

#BF19CC

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666FDE

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

Preview Lab → · Contrast checker → · Palette generator →