Changing Graph Color not working

[aacable2018]

I created graph for Temperature which is working fine.
I want to change its color which is yellow.

graph color.PNG (16.1 KiB) Viewed 566 times

I went to Edit graph template & changed its color but still color is yellow.

template.PNG (16.55 KiB) Viewed 566 times

How to change color of graph?

[aacable2018]

ah, I posted too early. I was editing in wrong section. using cacti 1.1.38
I managed to solve it by going to Management > Graphs > my graph > Unlock Graph, change color, save/lock graph