I realized that in last two updates the coloring scheme for the Sunlight Hours analysis has changed to gray-scale.
Me and my colleagues in the office preferred the old coloring scheme (blue to red) for Sunlight Hours analysis. The new gray-scale one is not as intuitive to read, even though I understand that you could associate the darker shades to more shadow. Is there a way to change to the old one, or set to user-defined coloring schemes?
Legend parameters, has an input for customColors_ which you can use to change the colors to any set of colors including the default ones that Antonello mentioned. There is a legend parameters input in Sunlight hours component as well as other Ladybug and Honeybee components. Here is an example on Hydra.