Latin ELements & color ? Please help?

Question

There are at least 9 elements from the periodic table that in Latin translate into the names of certain colors or shades of color. This is due to the fact that these elements, when discovered were found in compounds that had these colors. what are the names of 4 of these elements, their Latin names, and which colors they represent?

Answer 1

Here are a couple:

Rubidium, from Latn Rubidus, dark red.
Cesium, from Latin Caesius, blue-grey.