#666CF9#666CF9

#666CF9 is a mid, highly saturated blue. Relative luminance 0.204; OKLCH L 60.4% C 0.206 H 276.4°. Best body text is #000000 at 5.08:1 contrast (WCAG AA passes).

Color values

HEX#666CF9
RGBrgb(102, 108, 249)
HSLhsl(238, 92%, 69%)
HSVhsv(238, 59%, 98%)
CMYKcmyk(59%, 56.6%, 0%, 2.4%)
CIE-LABlab(52.27, 38.16, -71.41)
CIE-LCHlch(52.27, 80.97, 298.12°)
OKLaboklab(60.38% 0.0232 -0.2051)
OKLCHoklch(60.38% 0.206 276.4)
XYZxyz(27.9354, 20.3873, 92.0672)
Luminance0.2039 (WCAG relative)
Temperaturecool
Familyblue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary
#666CF9 #F9F366
analogous
#66B6F9 #666CF9 #AA66F9
triadic
#666CF9 #F9666C #6CF966
tetradic
#666CF9 #F966B6 #F9F366 #66F9AA
square
#666CF9 #F966B6 #F9F366 #66F9AA
split-complementary
#666CF9 #F9AA66 #B6F966
monochromatic
#0911DC #2B33F7 #666CF9 #A1A5FB #DCDDFE

Accessibility & contrast

On white

4.14
#666CF9 on #FFFFFF
AA ✗AA large ✓AAA ✗

On black

5.08
#666CF9 on #000000
AA ✓AA large ✓AAA ✗

Best text color

#000000 on #666CF9
5.08:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg##666CF9#FFFFFF#000000##000000
##666CF91.004.145.085.08
#FFFFFF4.141.0021.0021.00
#0000005.0821.001.001.00
##0000005.0821.001.001.00

Color blindness preview

Protanopia (red-blind)
#0083FE
Deuteranopia (green-blind)
#0077F6
Tritanopia (blue-blind)
#008EA8
Achromatopsia (no color)
#7D7D7D

Design tokens & code

CSS
--color: #666cf9;
/* rgb */ color: rgb(102, 108, 249);
/* oklch */ color: oklch(60.4% 0.206 276.4);
Tailwind
colors: {
  custom: {
    50: '#9e96fc',
    500: '#666cf9',
    950: '#000000',
  },
}
SCSS
$custom: #666cf9;
$custom-light: #9e96fc;
$custom-dark: #000000;
JSON
{
  "hex": "#666cf9",
  "rgb": {
    "r": 102,
    "g": 108,
    "b": 249
  },
  "hsl": {
    "h": 237.551,
    "s": 92.453,
    "l": 68.824
  },
  "oklch": {
    "l": 0.60379,
    "c": 0.20638,
    "h": 276.4
  },
  "luminance": 0.20389
}

Semantic roles & 50–950 ramp

primary
#666CF9
secondary
#F3F1C8
accent
#DC00E6
background
#FAF9FF
surface
#F4F2FF
border
#CECCD7
text
#100D18
muted
#7F7E86

Preview Lab

Preview with #666CF9

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

Preview Lab → · Contrast checker → · Palette generator →

#666CF9 Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva