i haven’t done this in a while but if i remember right the black mostly bled and i think a dark almost black blue bled.
does the clear move? i achieved the bleeding by applying the underglaze and immediately applying the clear glaze. lots of it - but not too much to cause the cloudiness.
thin lines have not bled that much. thicker lines with 3 or 4 coates of ug has bled.
if i want the design to move i’ve applied glaze and then applied underglaze (though mostly cobalt) on top of the glaze. it does not bleed. it just shifts.
also if i remember right, my walls bled, not the floors of the pots.
good luck!!!