Rendering with RGB code not matching color

I’m using Sketchup 2023 and TM latest version. Is there a way to match a color or is it a bug?

In trying to match a specific color on wood siding to the RGB code from color picker on line and there no problem using Twilight Render, all I have to do is pull up the color and hit match color and enter the RGB code.

After importing into Twinmotion, using the color picker and entering the RGB code the color looks off.
Also I’ve changed the time of day and all the other settings but if you try to lighten or darken the color after entering the code on Twinmotion it changes the RGB code . Just need to match the color to the wood siding?

See pic.

PS Twilight Render is going out of business so I need another render engine but frequently need to match colors for the customers. Twinmotion has been good for many other projects I’ve done. Been working with it for several years. Still need to match the colors.

Thanks, Billy G

I was able to provide a pretty good color match by eyeballing