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We show that a collar lemma holds for Anosov representations of fundamentalgroups of surfaces into $\SL(n,\R)$ that satisfy partial hyperconvexityproperties inspired from Labourie's work. This is the case for several opensets of Anosov representations not contained in higher rank Teichm\"ullerspaces, as well as for $\Theta$-positive representations into $\SO(p,q)$ if$p\geq 4$. We moreover show that 'positivity properties' known for Hitchinrepresentations, such as being positively ratioed and having positiveeigenvalue ratios, also hold for partially hyperconvex representations.

A collar lemma for partially hyperconvex surface group representations