Direct Sun Hours Analysis Only Show the Blue

Hi All, I am new to the ladybug and tried to do the sun hours analysis. I only analyzed one surface, but it only shows in blue (not like yellow and blue as normal). I want to know where it goes wrong. Thank you.

This is happening because all the numbers are the same. You can change the color using the legend parameters component.

Try running the same as study for a cube and you will see different colors.