Changing fonts in gauge

Hi, I am beginner in node red and trying to learn crating dashboard for my company. I saw a sample dashboard and am trying to make something similar to below image.
image

I want my temperature value big in font including the units. Also how I can change the color of the guage based on my values. Please guide me as I am begineer. I tried to look online help but could not much understand. thanks

As I am becoming more familiar with node-red, I have solved the above question myself. Huge thanks to the node red community for helping beginners like me.

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