#666CF7#666CF7

#666CF7 is a mid, highly saturated blue. Relative luminance 0.203; OKLCH L 60.2% C 0.204 H 276.5°. Best body text is #000000 at 5.05:1 contrast (WCAG AA passes).

Color values

HEX	#666CF7
RGB	rgb(102, 108, 247)
HSL	hsl(238, 90%, 68%)
HSV	hsv(238, 59%, 97%)
CMYK	cmyk(58.7%, 56.3%, 0%, 3.1%)
CIE-LAB	lab(52.13, 37.52, -70.53)
CIE-LCH	lch(52.13, 79.89, 298.01°)
OKLab	oklab(60.23% 0.0231 -0.2025)
OKLCH	oklch(60.23% 0.204 276.5)
XYZ	xyz(27.6251, 20.2632, 90.4331)
Luminance	0.2026 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#666CF7 #F7F166

analogous

#66B4F7 #666CF7 #A866F7

triadic

#666CF7 #F7666C #6CF766

tetradic

#666CF7 #F766B4 #F7F166 #66F7A8

square

#666CF7 #F766B4 #F7F166 #66F7A8

split-complementary

#666CF7 #F7A866 #B4F766

monochromatic

#0B14D7 #2C34F4 #666CF7 #A0A4FA #DADCFD

Accessibility & contrast

On white

4.16

#666CF7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.05

#666CF7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CF7

5.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##666CF7	#FFFFFF	#000000	##000000
##666CF7	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)

#0083FC

Deuteranopia (green-blind)

#0076F4

Tritanopia (blue-blind)

#008DA7

Achromatopsia (no color)

#7C7C7C

Design tokens & code

CSS

--color: #666cf7;
/* rgb */ color: rgb(102, 108, 247);
/* oklch */ color: oklch(60.2% 0.204 276.5);

Tailwind

colors: {
  custom: {
    50: '#9e96fb',
    500: '#666cf7',
    950: '#000000',
  },
}

SCSS

$custom: #666cf7;
$custom-light: #9e96fb;
$custom-dark: #000000;

JSON

{
  "hex": "#666cf7",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 247
  },
  "hsl": {
    "h": 237.517,
    "s": 90.062,
    "l": 68.431
  },
  "oklch": {
    "l": 0.60232,
    "c": 0.2038,
    "h": 276.5
  },
  "luminance": 0.20265
}

Semantic roles & 50–950 ramp

primary

#666CF7

secondary

#F2F0C7

accent

#DC00E6

background

#FAF9FF

surface

#F4F2FF

border

#CECCD7

text

#100D17

muted

#7F7E85

Preview Lab

Preview with #666CF7

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

Preview Lab → · Contrast checker → · Palette generator →