#666BE3#666BE3

#666BE3 is a mid, vivid blue. Relative luminance 0.189; OKLCH L 58.6% C 0.179 H 277.6°. Best body text is #000000 at 4.78:1 contrast (WCAG AA passes).

Color values

HEX	#666BE3
RGB	rgb(102, 107, 227)
HSL	hsl(238, 69%, 65%)
HSV	hsv(238, 55%, 89%)
CMYK	cmyk(55.1%, 52.9%, 0%, 11%)
CIE-LAB	lab(50.55, 31.77, -61.89)
CIE-LCH	lch(50.55, 69.57, 297.17°)
OKLab	oklab(58.63% 0.0235 -0.1771)
OKLCH	oklch(58.63% 0.179 277.6)
XYZ	xyz(24.5979, 18.8846, 75.0071)
Luminance	0.1889 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666BE3 #E3DE66

analogous

#66AAE3 #666BE3 #A066E3

triadic

#666BE3 #E3666B #6BE366

tetradic

#666BE3 #E366AA #E3DE66 #66E3A0

square

#666BE3 #E366AA #E3DE66 #66E3A0

split-complementary

#666BE3 #E3A066 #AAE366

monochromatic

#2026AF #3239DA #666BE3 #9A9DEC #CDCFF6

Accessibility & contrast

On white

4.40

#666BE3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.78

#666BE3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666BE3

4.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666BE3	#FFFFFF	#000000	##000000
##666BE3	1.00	4.40	4.78	4.78
#FFFFFF	4.40	1.00	21.00	21.00
#000000	4.78	21.00	1.00	1.00
##000000	4.78	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#247EE7

Deuteranopia (green-blind)

#0173E0

Tritanopia (blue-blind)

#25869D

Achromatopsia (no color)

#787878

Design tokens & code

CSS

--color: #666be3;
/* rgb */ color: rgb(102, 107, 227);
/* oklch */ color: oklch(58.6% 0.179 277.6);

Tailwind

colors: {
  custom: {
    50: '#9b95ec',
    500: '#666be3',
    950: '#000000',
  },
}

SCSS

$custom: #666be3;
$custom-light: #9b95ec;
$custom-dark: #000000;

JSON

{
  "hex": "#666be3",
  "rgb": {
    "r": 102,
    "g": 107,
    "b": 227
  },
  "hsl": {
    "h": 237.6,
    "s": 69.061,
    "l": 64.51
  },
  "oklch": {
    "l": 0.58626,
    "c": 0.17863,
    "h": 277.6
  },
  "luminance": 0.18886
}

Semantic roles & 50–950 ramp

primary

#666BE3

secondary

#E8E6BD

accent

#C914D1

background

#FAF9FE

surface

#F4F1FD

border

#CECBD5

text

#0F0D16

muted

#7F7E84

Preview Lab

Preview with #666BE3

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

Preview Lab → · Contrast checker → · Palette generator →