#666EE6#666EE6

#666EE6 is a mid, vivid blue. Relative luminance 0.197; OKLCH L 59.4% C 0.179 H 276.6°. Best body text is #000000 at 4.94:1 contrast (WCAG AA passes).

Color values

HEX	#666EE6
RGB	rgb(102, 110, 230)
HSL	hsl(236, 72%, 65%)
HSV	hsv(236, 56%, 90%)
CMYK	cmyk(55.7%, 52.2%, 0%, 9.8%)
CIE-LAB	lab(51.48, 30.90, -62.08)
CIE-LCH	lch(51.48, 69.34, 296.47°)
OKLab	oklab(59.39% 0.0206 -0.1776)
OKLCH	oklch(59.39% 0.179 276.6)
XYZ	xyz(25.3338, 19.6881, 77.3128)
Luminance	0.1969 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EE6 #E6DE66

analogous

#66AEE6 #666EE6 #9E66E6

triadic

#666EE6 #E6666E #6EE666

tetradic

#666EE6 #E666AE #E6DE66 #66E69E

square

#666EE6 #E666AE #E6DE66 #66E69E

split-complementary

#666EE6 #E69E66 #AEE666

monochromatic

#1D27B4 #313CDD #666EE6 #9BA0EF #CFD2F7

Accessibility & contrast

On white

4.25

#666EE6 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.94

#666EE6 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EE6

4.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EE6	#FFFFFF	#000000	##000000
##666EE6	1.00	4.25	4.94	4.94
#FFFFFF	4.25	1.00	21.00	21.00
#000000	4.94	21.00	1.00	1.00
##000000	4.94	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#2980EA

Deuteranopia (green-blind)

#0976E3

Tritanopia (blue-blind)

#1F899F

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #666ee6;
/* rgb */ color: rgb(102, 110, 230);
/* oklch */ color: oklch(59.4% 0.179 276.6);

Tailwind

colors: {
  custom: {
    50: '#9b97ef',
    500: '#666ee6',
    950: '#000000',
  },
}

SCSS

$custom: #666ee6;
$custom-light: #9b97ef;
$custom-dark: #000000;

JSON

{
  "hex": "#666ee6",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 230
  },
  "hsl": {
    "h": 236.25,
    "s": 71.91,
    "l": 65.098
  },
  "oklch": {
    "l": 0.59385,
    "c": 0.17879,
    "h": 276.6
  },
  "luminance": 0.1969
}

Semantic roles & 50–950 ramp

primary

#666EE6

secondary

#EAE7BE

accent

#C812D4

background

#FAF9FE

surface

#F4F2FD

border

#CECCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666EE6

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

Preview Lab → · Contrast checker → · Palette generator →