The oriented chromatic number of a directed 5-cycle is five.

And its chromatic number is 4: it can be colored using four colors, but not using only three.

In particular, finding the chromatic number of space usually refers to the 3-dimensional version.

Correspondingly, the chromatic number of an odd cycle is three.

Both of them have chromatic number 3, diameter 4 and girth 5.

There are two kinds of chromatic number associated with equitable coloring.

Another local property that leads to high chromatic number is the presence of a large clique.

Alternatively, it is a graph with a chromatic number of 2.

Gupta is known for his work in chromatic numbers.

The chromatic number is the minimum number of such sets.