jss how to change opacity for a color
Material UI has a colorManipulator
utility file, which includes an alpha
function:
import { alpha } from '@material-ui/core/styles/colorManipulator';/** * Sets the absolute transparency of a color. * Any existing alpha values are overwritten. * @param {string} color - CSS color, i.e. one of: #nnn, #nnnnnn, rgb(), rgba(), hsl(), hsla(), color() * @param {number} value - value to set the alpha channel to in the range 0 - 1 * @returns {string} A CSS color string. Hex input values are returned as rgb */{ backgroundColor: alpha(theme.colors.red, 0.5)}
Alternatively, you can add the color library from npm for color manipulation:
import Color from 'color';{ backgroundColor: Color(theme.colors.red).alpha(0.5).string()}
Alternatively, you can use the fade function provided in Material UI Next.
import {fade} from 'material-ui/styles/colorManipulator';const theme = createMuiTheme({ overrides: { MuiButton: { root: { boxShadow: `0 4px 8px 0 ${fade(defaultTheme.palette.primary[500], 0.18)}`, } }, }});export default theme;
Here's how it's working : https://github.com/mui-org/material-ui/blob/v1-beta/src/styles/colorManipulator.js#L157-L164
Another solution could be to use similar color functions from https://github.com/styled-components/polished
Assuming you don't already have the alpha channel defined in the color, you can also do:
backgroundColor: theme.colors.red + '00'
This will set alpha channel to 0, thus transparent. You can append any value between '00'
to 'ff'