Uses integer grid locations; narrower, integer stroke width; ellipse instead of spline for the shackle; shackle is more 'open'; transparent background instead of white background; blue color that should have acceptable contrast on black or white background.
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Adapted from 9px|Open_Access_logo_PLoS_white_green.svg Uses integer grid locations; narrower, integer stroke width; ellipse instead of spline for the shackle; shackle is more 'open'; transparent backgroun...