"Lilac" is actually a plant, a bush which blooms in the spring. The colors are from white to various shades of violet/ purple. And smells very good. It is very popular in Latvia but it is also sometimes to see in Denmark.
Ugh, in Swedish the word 'lilla' is definite form for 'liten'='small' and 'kjole' is very similar to Swedish word for a skirt which is "kjol". There are also many other words which are "false friends" but it makes learning Danish even more interesting!