Loads an image URL onto a 64x64 offscreen <canvas> and extracts up to maxColors (≤ 5) distinct palette swatches via SuggestColorsFromRgbaPixels.
<canvas>
maxColors
Loads an image URL onto a 64x64 offscreen
<canvas>and extracts up tomaxColors(≤ 5) distinct palette swatches via SuggestColorsFromRgbaPixels.