Just to inform you about the progress: I didn't manage to achieve exactly what I wanted, I used the gradient solution instead. Although it's clearly visible with larger dots and it's not so nice, I couldn't find another way (at least not without much manual work on every dot). I should mention that ...

Hello dear Inkscapers, I want to create tiled clones tracing the colours of a radial gradient with two colours of nearly similar H, S, L values (saturated green and yellow in this case). In addition, the tiles should shrink according to the gradient (one colour meaning full size, the other no size)....