<｜begin▁of▁sentence｜>### Instruction:
As an endocrinologist, you're analyzing a patient's bloodwork report, which includes various metrics represented by color-coded bars. Each bar's color is defined by an RGBA tuple indicating its hue and opacity. Now, you need to convert these RGBA color values into HTML hex strings for easier visualization on a web-based medical dashboard. To achieve this, you wonder how to utilize the 'color_to_html_format' function provided by the graph visualization library used in the dashboard's backend system.
### Response:
from igraph.drawing.colors import color_to_html_format

# Define a color with RGBA (alpha is optional)
rgba_color = (255, 165, 0, 128)  # Orange with 50% opacity

# Convert the color to HTML format
html_color = color_to_html_format(rgba_color)

print(html_color)
<|EOT|>
