Setting the color of a draw command inside foreach

Question

I am trying to draw colored lines with a foreach loop. The command I use to draw the line creates a colored line if I use it standalone. Once I put it inside the foreach loop, I only get a black line. How do I draw colored lines inside a foreach loop?

\documentclass{report}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}[lengthMark/.style={<->}]
    \foreach \i/\color in {0/{violet!50},1/yellow} {
        \draw[\color] (3.5, -.25-\i) -- ++(.5, 0);
        \draw[red] (0,0) --(2,2);
    }
\draw[red] (0,0) --(2,-2);
\end{tikzpicture}
\end{document}

write latex, note while posting it only the line drawn outside the foreach (\draw[red] (0,0) --(2,-2);) appears colored.

Answer 1

Use a different name instead of \color; in general, I always try to avoid using names which correspond to already defined commands:

\documentclass{report}
\usepackage{tikz}
\begin{document}
\begin{tikzpicture}
    \foreach \i/\colora in {0/{violet!50},1/yellow} {
        \draw[\colora] (3.5, -.25-\i) -- ++(.5, 0);
        \draw[red] (0,0) --(2,2);
    }
\draw[red] (0,0) --(2,-2);
\end{tikzpicture}
\end{document}