Purple Sieve in dreams
A mesh tool that separates fine from coarse — the work of letting through only what is wanted.
How purple changes the reading
Purple colour places the symbol between hot and cool — a reading that has both calm and intensity at once. The dream often uses purple for symbols that do not fit the usual categories cleanly. Take the reading more seriously than you would otherwise; the colour is asking you to.
The base reading of Sieve
A sieve in a dream is the dream's image of selective filtering. The sieve does not change what is poured into it; it lets through what is small enough and holds back what is not. The dream brings the sieve when you are sorting through a large input — information, advice, options — and the task is to keep only the fine grain. A sieve doing its job cleanly is the dream telling you the filter is working. A sieve clogged or torn is the dream noting that your filtering has stopped functioning and either nothing is getting through, or everything is.