#666FFF#666FFF

#666FFF is a mid, highly saturated blue. Relative luminance 0.214; OKLCH L 61.3% C 0.210 H 275.6°. Best body text is #000000 at 5.28:1 contrast (WCAG AA passes).

Color values

HEX	#666FFF
RGB	rgb(102, 111, 255)
HSL	hsl(236, 100%, 70%)
HSV	hsv(236, 60%, 100%)
CMYK	cmyk(60%, 56.5%, 0%, 0%)
CIE-LAB	lab(53.40, 38.29, -72.91)
CIE-LCH	lch(53.40, 82.35, 297.70°)
OKLab	oklab(61.35% 0.0205 -0.2095)
OKLCH	oklch(61.35% 0.21 275.6)
XYZ	xyz(29.2080, 21.4114, 97.1820)
Luminance	0.2141 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FFF #FFF666

analogous

#66BBFF #666FFF #AA66FF

triadic

#666FFF #FF666F #6FFF66

tetradic

#666FFF #FF66BB #FFF666 #66FFAA

square

#666FFF #FF66BB #FFF666 #66FFAA

split-complementary

#666FFF #FFAA66 #BBFF66

monochromatic

#000EEB #2935FF #666FFF #A3A9FF #E0E2FF

Accessibility & contrast

On white

3.98

#666FFF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.28

#666FFF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FFF

5.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FFF	#FFFFFF	#000000	##000000
##666FFF	1.00	3.98	5.28	5.28
#FFFFFF	3.98	1.00	21.00	21.00
#000000	5.28	21.00	1.00	1.00
##000000	5.28	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0086FF

Deuteranopia (green-blind)

#0079FC

Tritanopia (blue-blind)

#0091AC

Achromatopsia (no color)

#808080

Design tokens & code

CSS

--color: #666fff;
/* rgb */ color: rgb(102, 111, 255);
/* oklch */ color: oklch(61.3% 0.210 275.6);

Tailwind

colors: {
  custom: {
    50: '#9f98ff',
    500: '#666fff',
    950: '#000000',
  },
}

SCSS

$custom: #666fff;
$custom-light: #9f98ff;
$custom-dark: #000000;

JSON

{
  "hex": "#666fff",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 255
  },
  "hsl": {
    "h": 236.471,
    "s": 100,
    "l": 70
  },
  "oklch": {
    "l": 0.61346,
    "c": 0.21047,
    "h": 275.6
  },
  "luminance": 0.21414
}

Semantic roles & 50–950 ramp

primary

#666FFF

secondary

#F6F3CB

accent

#D800E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666FFF

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

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