#666EDD#666EDD

#666EDD is a mid, vivid blue. Relative luminance 0.192; OKLCH L 58.8% C 0.167 H 276.9°. Best body text is #000000 at 4.84:1 contrast (WCAG AA passes).

Color values

HEX	#666EDD
RGB	rgb(102, 110, 221)
HSL	hsl(236, 64%, 63%)
HSV	hsv(236, 54%, 87%)
CMYK	cmyk(53.8%, 50.2%, 0%, 13.3%)
CIE-LAB	lab(50.92, 28.05, -57.92)
CIE-LCH	lch(50.92, 64.36, 295.84°)
OKLab	oklab(58.78% 0.0199 -0.1654)
OKLCH	oklch(58.78% 0.167 276.9)
XYZ	xyz(24.1024, 19.1955, 70.8276)
Luminance	0.1920 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EDD #DDD566

analogous

#66A9DD #666EDD #9966DD

triadic

#666EDD #DD666E #6EDD66

tetradic

#666EDD #DD66A9 #DDD566 #66DD99

square

#666EDD #DD66A9 #DDD566 #66DD99

split-complementary

#666EDD #DD9966 #A9DD66

monochromatic

#242DA4 #343FD2 #666EDD #989DE8 #CACDF3

Accessibility & contrast

On white

4.34

#666EDD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.84

#666EDD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EDD

4.84:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EDD	#FFFFFF	#000000	##000000
##666EDD	1.00	4.34	4.84	4.84
#FFFFFF	4.34	1.00	21.00	21.00
#000000	4.84	21.00	1.00	1.00
##000000	4.84	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#357EE1

Deuteranopia (green-blind)

#2575DB

Tritanopia (blue-blind)

#2C879B

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #666edd;
/* rgb */ color: rgb(102, 110, 221);
/* oklch */ color: oklch(58.8% 0.167 276.9);

Tailwind

colors: {
  custom: {
    50: '#9a97e8',
    500: '#666edd',
    950: '#000000',
  },
}

SCSS

$custom: #666edd;
$custom-light: #9a97e8;
$custom-dark: #000000;

JSON

{
  "hex": "#666edd",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 221
  },
  "hsl": {
    "h": 235.966,
    "s": 63.636,
    "l": 63.333
  },
  "oklch": {
    "l": 0.58777,
    "c": 0.16658,
    "h": 276.9
  },
  "luminance": 0.19197
}

Semantic roles & 50–950 ramp

primary

#666EDD

secondary

#E5E2BA

accent

#BF1ACB

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666EDD

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

Preview Lab → · Contrast checker → · Palette generator →