I want to use the colours offered by
\usepackage[dvipsnames]{xcolor}
in a beamer but I have an error:
Option clash for package xcolor. \usepackage
I am using the following packages:
\documentclass{beamer}
\usetheme{Madrid}
\usecolortheme{beaver}
\usepackage{textpos}
\usepackage{subfig}
\usepackage{tikz}
\usepackage{parallel,enumitem}
\usepackage[export]{adjustbox}
\usepackage[italian]{babel}
\usepackage{ dsfont }
\usepackage{tikz}
\usetikzlibrary{positioning}
\usepackage{varwidth}
\usepackage{multicol}
\PassOptionsToPackage{dvipsnames}{xcolor}
before the\documentclass
... (Not sure if it'll work)