Similar to the abnormally blue rest‐frame UV colors observed in some of the ﹩z\approx 6﹩ candidates, a significant number of ﹩z\approx 5﹩ objects in the HUDF also have blue UV colors that are inconsistent with any model. For clarity, this figure shows only the ﹩z\approx 5﹩ objects in our sample. The "isochrone" tracks, as well as the symbols, are the same as in Fig. 4. The four objects without horizontal error bars are those that have been spectroscopically confirmed. All other objects are plotted at ﹩z=5﹩ with error bars indicating the possible redshift range of ﹩4.5\leq z\leq 5.5﹩.