#666DFF#666DFF

#666DFF is a mid, highly saturated blue. Relative luminance 0.210; OKLCH L 61.0% C 0.213 H 276.0°. Best body text is #000000 at 5.20:1 contrast (WCAG AA passes).

Color values

HEX	#666DFF
RGB	rgb(102, 109, 255)
HSL	hsl(237, 100%, 70%)
HSV	hsv(237, 60%, 100%)
CMYK	cmyk(60%, 57.3%, 0%, 0%)
CIE-LAB	lab(52.93, 39.48, -73.67)
CIE-LCH	lch(52.93, 83.58, 298.18°)
OKLab	oklab(61% 0.0223 -0.2117)
OKLCH	oklch(61% 0.213 276)
XYZ	xyz(28.9923, 20.9798, 97.1101)
Luminance	0.2098 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DFF #FFF866

analogous

#66B9FF #666DFF #AC66FF

triadic

#666DFF #FF666D #6DFF66

tetradic

#666DFF #FF66B9 #FFF866 #66FFAC

square

#666DFF #FF66B9 #FFF866 #66FFAC

split-complementary

#666DFF #FFAC66 #B9FF66

monochromatic

#000BEB #2933FF #666DFF #A3A7FF #E0E2FF

Accessibility & contrast

On white

4.04

#666DFF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.20

#666DFF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DFF

5.20:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DFF	#FFFFFF	#000000	##000000
##666DFF	1.00	4.04	5.20	5.20
#FFFFFF	4.04	1.00	21.00	21.00
#000000	5.20	21.00	1.00	1.00
##000000	5.20	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0085FF

Deuteranopia (green-blind)

#0078FC

Tritanopia (blue-blind)

#0090AC

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666dff;
/* rgb */ color: rgb(102, 109, 255);
/* oklch */ color: oklch(61.0% 0.213 276.0);

Tailwind

colors: {
  custom: {
    50: '#9f97ff',
    500: '#666dff',
    950: '#000000',
  },
}

SCSS

$custom: #666dff;
$custom-light: #9f97ff;
$custom-dark: #000000;

JSON

{
  "hex": "#666dff",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 255
  },
  "hsl": {
    "h": 237.255,
    "s": 100,
    "l": 70
  },
  "oklch": {
    "l": 0.60997,
    "c": 0.2129,
    "h": 276
  },
  "luminance": 0.20982
}

Semantic roles & 50–950 ramp

primary

#666DFF

secondary

#F6F4CB

accent

#DB00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666DFF

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

Preview Lab → · Contrast checker → · Palette generator →