Answers for "best linear gradient color for multiple color background"

css linear gradient

#grad {
  background-image: linear-gradient(to right, #f1b1b1 , #82e6e8);

}

css horizontal gradient background color

.foo {
	background-image: linear-gradient(red, blue);
}

Gradient Color Code Generator

background-image: linear-gradient(90deg, #020024 0%, #090979 35%, #00d4ff 100%);