Trouble With Theme Color Change

I have tried to change the color scheme as directed in your help file at https://docs.semicolonweb.com/docs/getting-started/color-schemes/

I have added the following into the css/custom.css file, but it doesn’t see to do anything.

:root {
--cnvs-themecolor: #e3bcff !important;
--cnvs-themecolor-rgb: 227, 188, 253 !important;
}

I’ve also tried changing it directly in the style.css file in the root folder with no luck.

I can change the color per once but when i refresh the page or rebuild the project, color changed to original one.

Any ideas as to what I am doing wrong?