#666DF3#666DF3

#666DF3 is a mid, vivid blue. Relative luminance 0.202; OKLCH L 60.1% C 0.197 H 276.4°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#666DF3
RGB	rgb(102, 109, 243)
HSL	hsl(237, 85%, 68%)
HSV	hsv(237, 58%, 95%)
CMYK	cmyk(58%, 55.1%, 0%, 4.7%)
CIE-LAB	lab(52.10, 35.65, -68.36)
CIE-LCH	lch(52.10, 77.09, 297.54°)
OKLab	oklab(60.12% 0.0221 -0.1961)
OKLCH	oklch(60.12% 0.197 276.4)
XYZ	xyz(27.1206, 20.2311, 87.2525)
Luminance	0.2023 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DF3 #F3EC66

analogous

#66B4F3 #666DF3 #A566F3

triadic

#666DF3 #F3666D #6DF366

tetradic

#666DF3 #F366B4 #F3EC66 #66F3A5

square

#666DF3 #F366B4 #F3EC66 #66F3A5

split-complementary

#666DF3 #F3A566 #B4F366

monochromatic

#101ACE #2D37EF #666DF3 #9FA3F7 #D7D9FC

Accessibility & contrast

On white

4.16

#666DF3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#666DF3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DF3

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DF3	#FFFFFF	#000000	##000000
##666DF3	1.00	4.16	5.05	5.05
#FFFFFF	4.16	1.00	21.00	21.00
#000000	5.05	21.00	1.00	1.00
##000000	5.05	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0082F8

Deuteranopia (green-blind)

#0076F0

Tritanopia (blue-blind)

#008CA5

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666df3;
/* rgb */ color: rgb(102, 109, 243);
/* oklch */ color: oklch(60.1% 0.197 276.4);

Tailwind

colors: {
  custom: {
    50: '#9d96f8',
    500: '#666df3',
    950: '#000000',
  },
}

SCSS

$custom: #666df3;
$custom-light: #9d96f8;
$custom-dark: #000000;

JSON

{
  "hex": "#666df3",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 243
  },
  "hsl": {
    "h": 237.021,
    "s": 85.455,
    "l": 67.647
  },
  "oklch": {
    "l": 0.60118,
    "c": 0.19734,
    "h": 276.4
  },
  "luminance": 0.20233
}

Semantic roles & 50–950 ramp

primary

#666DF3

secondary

#F0EEC5

accent

#D704E2

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#0F0D17

muted

#7F7E85

Preview Lab

Preview with #666DF3

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

Preview Lab → · Contrast checker → · Palette generator →