#666AF3#666AF3

#666AF3 is a mid, highly saturated blue. Relative luminance 0.196; OKLCH L 59.6% C 0.201 H 277.1°. Best body text is #000000 at 4.92:1 contrast (WCAG AA passes).

Color values

HEX	#666AF3
RGB	rgb(102, 106, 243)
HSL	hsl(238, 85%, 68%)
HSV	hsv(238, 58%, 95%)
CMYK	cmyk(58%, 56.4%, 0%, 4.7%)
CIE-LAB	lab(51.38, 37.45, -69.51)
CIE-LCH	lch(51.38, 78.96, 298.31°)
OKLab	oklab(59.59% 0.025 -0.1995)
OKLCH	oklch(59.59% 0.201 277.1)
XYZ	xyz(26.8060, 19.6020, 87.1476)
Luminance	0.1960 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666AF3 #F3EF66

analogous

#66B0F3 #666AF3 #A966F3

triadic

#666AF3 #F3666A #6AF366

tetradic

#666AF3 #F366B0 #F3EF66 #66F3A9

square

#666AF3 #F366B0 #F3EF66 #66F3A9

split-complementary

#666AF3 #F3A966 #B0F366

monochromatic

#1016CE #2D33EF #666AF3 #9FA1F7 #D7D9FC

Accessibility & contrast

On white

4.27

#666AF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.92

#666AF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666AF3

4.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666AF3	#FFFFFF	#000000	##000000
##666AF3	1.00	4.27	4.92	4.92
#FFFFFF	4.27	1.00	21.00	21.00
#000000	4.92	21.00	1.00	1.00
##000000	4.92	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0080F8

Deuteranopia (green-blind)

#0075F0

Tritanopia (blue-blind)

#008AA4

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #666af3;
/* rgb */ color: rgb(102, 106, 243);
/* oklch */ color: oklch(59.6% 0.201 277.1);

Tailwind

colors: {
  custom: {
    50: '#9d94f8',
    500: '#666af3',
    950: '#000000',
  },
}

SCSS

$custom: #666af3;
$custom-light: #9d94f8;
$custom-dark: #000000;

JSON

{
  "hex": "#666af3",
  "rgb": {
    "r": 102,
    "g": 106,
    "b": 243
  },
  "hsl": {
    "h": 238.298,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.59587,
    "c": 0.20107,
    "h": 277.1
  },
  "luminance": 0.19604
}

Semantic roles & 50–950 ramp

primary

#666AF3

secondary

#F0EFC5

accent

#DC04E2

background

#FAF9FF

surface

#F4F1FF

border

#CECBD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666AF3

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

Preview Lab → · Contrast checker → · Palette generator →