How to change History Graph primary color

Configuration Frontend
1

I saw that HA graph colors are now themeable:
https://github.com/home-assistant/frontend/issues/9547
https://github.com/home-assistant/frontend/pull/10698

However, I can’t figure out which theme color affects the blue line in the graph below:
Screenshot 05-18-2023 at 08.15.25 PM

None of the theme colors below seem to affect it:

--state-on-color
--state-off-color
--state-home-color
--state-not_home-color
--state-unavailable-color
--state-unknown-color
--state-idle-color

PS: Suggesting to replace all my history cards with a completely different graph card that does have color control is NOT a solution; at least not for me.

2

Those are state colours, which only change icon and strip chart colours.

There is no theme variable for line chart colours.

3

Thank you for confirming.

4

Actually, the following theme color changes the primary graph line color in the graph.

graph-color-1
image