name the solution used to colour parts of the cell to study the detailed structure

The common stains used to study different parts of cell include

Crystal violet

Crystal violet stains cell walls purple. 

Eosin

Eosin used to observe cytoplasmic material, cell membranes, and some extracellular structures. It imparts pink or red colour to these structures.

Ethidium bromide

Ethidium bromide stains DNA, providing a fluorescent red-orange stain. 

Acid fuchsine

Acid fuchsine may be used to stain mitochondria. 

Haematoxylin

Haematoxylin stains nuclei blue-violet or brown.

Iodine

Iodine is used as an indicator for starch. 

Methyl green

Methyl green is used commonly to dye the chromatin of cells so that they are more easily viewed.

Methylene blue

Methylene blue is used to stain animal cells, such as human cheek cells, to make their nuclei more observable. 

Safranin

Safranin is used to stain nuclei, gives it red colour.