old_contents: 'use babel'
  
  const COLOR_EXTRACTION_REGEXP = /rgb\(\d+, \d+, \d+\)|\#[0-9a-f]{3,6}/
  
  export function isColor(textEditor, bufferPosition) {
    const lineText = textEditor.getTextInRange([[bufferPosition.row, 0], [bufferPosition.row, Infinity]])
    const matches = COLOR_EXTRACTION_REGEXP.exec(lineText)
    if (matches === null) {
      return false
    }
    const offsetStart = matches.index
    const offsetEnd = offsetStart + matches[0].length
    return bufferPosition.column >= offsetStart && offsetEnd >= bufferPosition.column
  }
  
new_contents: 'use babel'
  
  const COLOR_EXTRACTION_REGEXP = /rgb\(\d+, ?\d+, ?\d+\)|rgba\(\d+, ?\d+, ?\d+, ?\d?\.?\d+\)|#[0-9a-f]{3,6}/
  
  export function isColor(textEditor, bufferPosition) {
    const lineText = textEditor.getTextInRange([[bufferPosition.row, 0], [bufferPosition.row, Infinity]])
    const matches = COLOR_EXTRACTION_REGEXP.exec(lineText)
    if (matches === null) {
      return false
    }
    const offsetStart = matches.index
    const offsetEnd = offsetStart + matches[0].length
    return bufferPosition.column >= offsetStart && offsetEnd >= bufferPosition.column
  }
  
subject: Add rgba support to regex