\begin{tikzpicture}
\node (3d) at (-4,1) {\includegraphics[height=1.5in]{FigColored/Ising_deg4_3D.png}};
\node (l2) at (1,-0.2) [rectangle,draw,fill = cb-red!20,inner sep=0.8pt] {$\lambda = 2$};
\node (l13) at (-3,2.8) [rectangle,draw,fill = cb-blue!20,inner sep=0.8pt] {$\lambda = \frac{1}{3}$};
\node (l3) at (-1.3,1.4) [rectangle,draw,fill = cb-blue!20,inner sep=0.8pt] {$\lambda = 3$};
% \node (curve) at (-1,-0.4) {
\begin{axis}[
    width=2in,  %2in,
    height=2in,
    axis lines=center,
    xlabel=\empty,
    ylabel=\empty,
    xticklabel=\empty,
    yticklabel=\empty, 
    xmin=-8,xmax=8,ymin=-8,ymax=8]
    % x equation
    \addplot+[no markers, samples=200, domain=0:360, variable=\t, line width=1.3, color = cb-yellow!20!cb-red]
    ({cos(t)*(cos(t)^4/24+cos(t)^2*sin(t)^2/2+sin(t)^4/6)*40}, {sin(t)*(cos(t)^4/24+cos(t)^2*sin(t)^2/2+sin(t)^4/6)*40});
    % highlight intersections
    \addplot [only marks, mark=x, line width = 1.3, mark size = 3pt] table {
    % 0  0
    % 2.44949  0
    % -2.44949  0
    0  6.66667
    0  -6.66667
    1.66667  0
    -1.66667  0
    };
    \addplot [only marks, mark=square*, mark size = 2pt] table {
    4.07255  6.43927
    4.07255  -6.43927
    -4.07255  6.43927
    -4.07255  -6.43927
    };
\end{axis}
% };
\draw[->, black, line width = 1] (-2.85,1.9) to[bend left=35] (0.5,3);
\end{tikzpicture}