#666FF9#666FF9

#666FF9 is a mid, highly saturated blue. Relative luminance 0.210; OKLCH L 60.9% C 0.203 H 275.8°. Best body text is #000000 at 5.21:1 contrast (WCAG AA passes).

Color values

HEX	#666FF9
RGB	rgb(102, 111, 249)
HSL	hsl(236, 92%, 69%)
HSV	hsv(236, 59%, 98%)
CMYK	cmyk(59%, 55.4%, 0%, 2.4%)
CIE-LAB	lab(52.98, 36.37, -70.26)
CIE-LCH	lch(52.98, 79.11, 297.37°)
OKLab	oklab(60.91% 0.0204 -0.2017)
OKLCH	oklch(60.91% 0.203 275.8)
XYZ	xyz(28.2573, 21.0311, 92.1745)
Luminance	0.2103 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666FF9 #F9F066

analogous

#66B8F9 #666FF9 #A766F9

triadic

#666FF9 #F9666F #6FF966

tetradic

#666FF9 #F966B8 #F9F066 #66F9A7

square

#666FF9 #F966B8 #F9F066 #66F9A7

split-complementary

#666FF9 #F9A766 #B8F966

monochromatic

#0916DC #2B38F7 #666FF9 #A1A6FB #DCDEFE

Accessibility & contrast

On white

4.03

#666FF9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.21

#666FF9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666FF9

5.21:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666FF9	#FFFFFF	#000000	##000000
##666FF9	1.00	4.03	5.21	5.21
#FFFFFF	4.03	1.00	21.00	21.00
#000000	5.21	21.00	1.00	1.00
##000000	5.21	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0085FE

Deuteranopia (green-blind)

#0078F6

Tritanopia (blue-blind)

#0090A9

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666ff9;
/* rgb */ color: rgb(102, 111, 249);
/* oklch */ color: oklch(60.9% 0.203 275.8);

Tailwind

colors: {
  custom: {
    50: '#9e98fc',
    500: '#666ff9',
    950: '#000000',
  },
}

SCSS

$custom: #666ff9;
$custom-light: #9e98fc;
$custom-dark: #000000;

JSON

{
  "hex": "#666ff9",
  "rgb": {
    "r": 102,
    "g": 111,
    "b": 249
  },
  "hsl": {
    "h": 236.327,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.60908,
    "c": 0.2027,
    "h": 275.8
  },
  "luminance": 0.21033
}

Semantic roles & 50–950 ramp

primary

#666FF9

secondary

#F3F0C8

accent

#D700E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666FF9

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

Preview Lab → · Contrast checker → · Palette generator →