#666FF8#666FF8

#666FF8 is a mid, highly saturated blue. Relative luminance 0.210; OKLCH L 60.8% C 0.201 H 275.8°. Best body text is #000000 at 5.19:1 contrast (WCAG AA passes).

Color values

HEX	#666FF8
RGB	rgb(102, 111, 248)
HSL	hsl(236, 91%, 69%)
HSV	hsv(236, 59%, 97%)
CMYK	cmyk(58.9%, 55.2%, 0%, 2.7%)
CIE-LAB	lab(52.92, 36.05, -69.81)
CIE-LCH	lch(52.92, 78.57, 297.31°)
OKLab	oklab(60.83% 0.0204 -0.2004)
OKLCH	oklch(60.83% 0.201 275.8)
XYZ	xyz(28.1017, 20.9688, 91.3553)
Luminance	0.2097 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FF8 #F8EF66

analogous

#66B8F8 #666FF8 #A666F8

triadic

#666FF8 #F8666F #6FF866

tetradic

#666FF8 #F866B8 #F8EF66 #66F8A6

square

#666FF8 #F866B8 #F8EF66 #66F8A6

split-complementary

#666FF8 #F8A666 #B8F866

monochromatic

#0A17DA #2B38F5 #666FF8 #A1A6FB #DBDDFD

Accessibility & contrast

On white

4.04

#666FF8 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.19

#666FF8 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FF8

5.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FF8	#FFFFFF	#000000	##000000
##666FF8	1.00	4.04	5.19	5.19
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.19	21.00	1.00	1.00
##000000	5.19	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0085FD

Deuteranopia (green-blind)

#0078F5

Tritanopia (blue-blind)

#008FA9

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666ff8;
/* rgb */ color: rgb(102, 111, 248);
/* oklch */ color: oklch(60.8% 0.201 275.8);

Tailwind

colors: {
  custom: {
    50: '#9e98fb',
    500: '#666ff8',
    950: '#000000',
  },
}

SCSS

$custom: #666ff8;
$custom-light: #9e98fb;
$custom-dark: #000000;

JSON

{
  "hex": "#666ff8",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 248
  },
  "hsl": {
    "h": 236.301,
    "s": 91.25,
    "l": 68.627
  },
  "oklch": {
    "l": 0.60835,
    "c": 0.20139,
    "h": 275.8
  },
  "luminance": 0.20971
}

Semantic roles & 50–950 ramp

primary

#666FF8

secondary

#F3F0C7

accent

#D700E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666FF8

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

Preview Lab → · Contrast checker → · Palette generator →