#666EE0#666EE0

#666EE0 is a mid, vivid blue. Relative luminance 0.194; OKLCH L 59.0% C 0.171 H 276.8°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#666EE0
RGB	rgb(102, 110, 224)
HSL	hsl(236, 66%, 64%)
HSV	hsv(236, 54%, 88%)
CMYK	cmyk(54.5%, 50.9%, 0%, 12.2%)
CIE-LAB	lab(51.10, 29.00, -59.31)
CIE-LCH	lch(51.10, 66.02, 296.06°)
OKLab	oklab(58.98% 0.0202 -0.1695)
OKLCH	oklch(58.98% 0.171 276.8)
XYZ	xyz(24.5057, 19.3568, 72.9515)
Luminance	0.1936 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666EE0 #E0D866

analogous

#66ABE0 #666EE0 #9B66E0

triadic

#666EE0 #E0666E #6EE066

tetradic

#666EE0 #E066AB #E0D866 #66E09B

square

#666EE0 #E066AB #E0D866 #66E09B

split-complementary

#666EE0 #E09B66 #ABE066

monochromatic

#222BA9 #333ED6 #666EE0 #999EEA #CCCEF5

Accessibility & contrast

On white

4.31

#666EE0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#666EE0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666EE0

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666EE0	#FFFFFF	#000000	##000000
##666EE0	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#327FE4

Deuteranopia (green-blind)

#1E75DE

Tritanopia (blue-blind)

#28889D

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666ee0;
/* rgb */ color: rgb(102, 110, 224);
/* oklch */ color: oklch(59.0% 0.171 276.8);

Tailwind

colors: {
  custom: {
    50: '#9a97ea',
    500: '#666ee0',
    950: '#000000',
  },
}

SCSS

$custom: #666ee0;
$custom-light: #9a97ea;
$custom-dark: #000000;

JSON

{
  "hex": "#666ee0",
  "rgb": {
    "r": 102,
    "g": 110,
    "b": 224
  },
  "hsl": {
    "h": 236.066,
    "s": 66.304,
    "l": 63.922
  },
  "oklch": {
    "l": 0.58978,
    "c": 0.17067,
    "h": 276.8
  },
  "luminance": 0.19358
}

Semantic roles & 50–950 ramp

primary

#666EE0

secondary

#E6E3BC

accent

#C217CE

background

#FAF9FE

surface

#F3F2FD

border

#CDCCD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666EE0

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

Preview Lab → · Contrast checker → · Palette generator →