#666DFD#666DFD

#666DFD is a mid, highly saturated blue. Relative luminance 0.209; OKLCH L 60.8% C 0.210 H 276.1°. Best body text is #000000 at 5.17:1 contrast (WCAG AA passes).

Color values

HEX	#666DFD
RGB	rgb(102, 109, 253)
HSL	hsl(237, 97%, 70%)
HSV	hsv(237, 60%, 99%)
CMYK	cmyk(59.7%, 56.9%, 0%, 0.8%)
CIE-LAB	lab(52.79, 38.84, -72.80)
CIE-LCH	lch(52.79, 82.51, 298.08°)
OKLab	oklab(60.85% 0.0223 -0.2091)
OKLCH	oklch(60.85% 0.21 276.1)
XYZ	xyz(28.6720, 20.8517, 95.4233)
Luminance	0.2085 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666DFD #FDF666

analogous

#66B8FD #666DFD #AB66FD

triadic

#666DFD #FD666D #6DFD66

tetradic

#666DFD #FD66B8 #FDF666 #66FDAB

square

#666DFD #FD66B8 #FDF666 #66FDAB

split-complementary

#666DFD #FDAB66 #B8FD66

monochromatic

#030EE6 #2A33FC #666DFD #A2A7FE #DFE0FF

Accessibility & contrast

On white

4.06

#666DFD on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.17

#666DFD on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666DFD

5.17:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666DFD	#FFFFFF	#000000	##000000
##666DFD	1.00	4.06	5.17	5.17
#FFFFFF	4.06	1.00	21.00	21.00
#000000	5.17	21.00	1.00	1.00
##000000	5.17	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#0085FF

Deuteranopia (green-blind)

#0078FA

Tritanopia (blue-blind)

#0090AB

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #666dfd;
/* rgb */ color: rgb(102, 109, 253);
/* oklch */ color: oklch(60.8% 0.210 276.1);

Tailwind

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

SCSS

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

JSON

{
  "hex": "#666dfd",
  "rgb": {
    "r": 102,
    "g": 109,
    "b": 253
  },
  "hsl": {
    "h": 237.219,
    "s": 97.419,
    "l": 69.608
  },
  "oklch": {
    "l": 0.60849,
    "c": 0.21033,
    "h": 276.1
  },
  "luminance": 0.20854
}

Semantic roles & 50–950 ramp

primary

#666DFD

secondary

#F5F3CA

accent

#DB00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D18

muted

#7F7E86

Preview Lab

Preview with #666DFD

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

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