how to change theme color

Hello, I wonder how to change the theme color. I download the kubesphere console project and make a new file to rewrite the color variables，but it doesn't work.

```
@import '../src/scss/variables';

@import "~@kube-design/components/esm/styles/index.scss";
```
Is the theme color can be rewrite by this way? or is there another way?
Looking forward to answer， Thanks！