<｜begin▁of▁sentence｜>### Instruction:
As a data analyst, you may need to determine the number of available colors in a precalculated palette when working on a data visualization project. Utilizing the "PrecalculatedPalette" API, you can access the list of colors and then perform an analysis to ascertain the total count of distinct colors in the palette.
### Response:
from igraph.drawing.colors import PrecalculatedPalette

# Create an instance of PrecalculatedPalette
palette = PrecalculatedPalette(['red', 'green', 'blue'])

# Use the __len__ method to get the number of colors in the palette
number_of_colors = len(palette)

# Print the number of colors
print(number_of_colors)
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