If Mr. Lim has a total of 40 marbles that are colored red, yellow, green, blue, and white, and the number of marbles of each color is identical, then we can calculate the number of marbles of each color by dividing the total number of marbles by the number of colors.
There are 5 colors (red, yellow, green, blue, and white).
To find the number of marbles of each color:
\[ \text{Number of marbles of each color} = \frac{\text{Total number of marbles}}{\text{Number of colors}} = \frac{40}{5} = 8 \]
Thus, there are 8 marbles of each color: red, yellow, green, blue, and white.