I am developing a website. Do you have any suggestions for making gradient colors using CSS
You could try one of the online tools, eg here
Here’s a tutorial on CSS Gradients: https://www.w3schools.com/css/css3_gradients.asp. It looks fairly easy.
Visit W3schools for tutorials, in gradient, Below is an example to Gradient color in CSS.
background: linear-gradient(to bottom, #33ccff 0%, #ff99cc 100%);