#666DEB#666DEB

#666DEB is a mid, vivid blue. Relative luminance 0.198; OKLCH L 59.5% C 0.187 H 276.7°. Best body text is #000000 at 4.95:1 contrast (WCAG AA passes).

Color values

HEX	#666DEB
RGB	rgb(102, 109, 235)
HSL	hsl(237, 77%, 66%)
HSV	hsv(237, 57%, 92%)
CMYK	cmyk(56.6%, 53.6%, 0%, 7.8%)
CIE-LAB	lab(51.56, 33.10, -64.75)
CIE-LCH	lch(51.56, 72.72, 297.08°)
OKLab	oklab(59.55% 0.0219 -0.1855)
OKLCH	oklch(59.55% 0.187 276.7)
XYZ	xyz(25.9387, 19.7584, 81.0280)
Luminance	0.1976 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DEB #EBE466

analogous

#66AFEB #666DEB #A166EB

triadic

#666DEB #EB666D #6DEB66

tetradic

#666DEB #EB66AF #EBE466 #66EBA1

square

#666DEB #EB66AF #EBE466 #66EBA1

split-complementary

#666DEB #EBA166 #AFEB66

monochromatic

#1921BE #3039E4 #666DEB #9CA1F2 #D2D4F9

Accessibility & contrast

On white

4.24

#666DEB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.95

#666DEB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DEB

4.95:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DEB	#FFFFFF	#000000	##000000
##666DEB	1.00	4.24	4.95	4.95
#FFFFFF	4.24	1.00	21.00	21.00
#000000	4.95	21.00	1.00	1.00
##000000	4.95	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B81EF

Deuteranopia (green-blind)

#0075E8

Tritanopia (blue-blind)

#138AA1

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666deb;
/* rgb */ color: rgb(102, 109, 235);
/* oklch */ color: oklch(59.5% 0.187 276.7);

Tailwind

colors: {
  custom: {
    50: '#9c96f2',
    500: '#666deb',
    950: '#000000',
  },
}

SCSS

$custom: #666deb;
$custom-light: #9c96f2;
$custom-dark: #000000;

JSON

{
  "hex": "#666deb",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 235
  },
  "hsl": {
    "h": 236.842,
    "s": 76.879,
    "l": 66.078
  },
  "oklch": {
    "l": 0.59549,
    "c": 0.18676,
    "h": 276.7
  },
  "luminance": 0.1976
}

Semantic roles & 50–950 ramp

primary

#666DEB

secondary

#ECEAC1

accent

#CE0CD9

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DEB

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

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