botframework-webchat-component/src/Styles/StyleSet/UploadButton.js

React component of botframework-webchat

export default function createUploadButtonStyle({
  sendBoxButtonColor,
  sendBoxButtonColorOnFocus,
  sendBoxButtonColorOnHover,
  sendBoxHeight,
  subtle
}) {
  return {
    // We use the sendBoxHeight, so the button looks square
    width: sendBoxHeight,

    '& > .icon > svg': {
      fill: sendBoxButtonColor || subtle
    },

    '& > input:hover + .icon > svg': {
      fill: sendBoxButtonColorOnHover
    },

    '& > input:focus + .icon > svg': {
      fill: sendBoxButtonColorOnFocus
    }
  };
}