#666FF0#666FF0

#666FF0 is a mid, vivid blue. Relative luminance 0.205; OKLCH L 60.3% C 0.191 H 276.0°. Best body text is #000000 at 5.10:1 contrast (WCAG AA passes).

Color values

HEX	#666FF0
RGB	rgb(102, 111, 240)
HSL	hsl(236, 82%, 67%)
HSV	hsv(236, 58%, 94%)
CMYK	cmyk(57.5%, 53.8%, 0%, 5.9%)
CIE-LAB	lab(52.38, 33.49, -66.23)
CIE-LCH	lch(52.38, 74.21, 296.82°)
OKLab	oklab(60.26% 0.0201 -0.1898)
OKLCH	oklch(60.26% 0.191 276)
XYZ	xyz(26.8870, 20.4830, 84.9579)
Luminance	0.2049 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FF0 #F0E766

analogous

#66B4F0 #666FF0 #A266F0

triadic

#666FF0 #F0666F #6FF066

tetradic

#666FF0 #F066B4 #F0E766 #66F0A2

square

#666FF0 #F066B4 #F0E766 #66F0A2

split-complementary

#666FF0 #F0A266 #B4F066

monochromatic

#141FC8 #2E3BEB #666FF0 #9EA3F5 #D5D8FB

Accessibility & contrast

On white

4.12

#666FF0 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.10

#666FF0 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FF0

5.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FF0	#FFFFFF	#000000	##000000
##666FF0	1.00	4.12	5.10	5.10
#FFFFFF	4.12	1.00	21.00	21.00
#000000	5.10	21.00	1.00	1.00
##000000	5.10	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#1883F4

Deuteranopia (green-blind)

#0077ED

Tritanopia (blue-blind)

#008DA5

Achromatopsia (no color)

#7D7D7D

Design tokens & code

CSS

--color: #666ff0;
/* rgb */ color: rgb(102, 111, 240);
/* oklch */ color: oklch(60.3% 0.191 276.0);

Tailwind

colors: {
  custom: {
    50: '#9d98f6',
    500: '#666ff0',
    950: '#000000',
  },
}

SCSS

$custom: #666ff0;
$custom-light: #9d98f6;
$custom-dark: #000000;

JSON

{
  "hex": "#666ff0",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 240
  },
  "hsl": {
    "h": 236.087,
    "s": 82.143,
    "l": 67.059
  },
  "oklch": {
    "l": 0.60264,
    "c": 0.19087,
    "h": 276
  },
  "luminance": 0.20485
}

Semantic roles & 50–950 ramp

primary

#666FF0

secondary

#EFECC3

accent

#D007DF

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666FF0

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

Preview Lab → · Contrast checker → · Palette generator →