Color–color diagrams showing the positions of the newly discovered quasars (stars) and the known high-redshift quasars at the same redshift range of our discoveries 5.94 ≤ z ≤ 6.45 (filled circles), both color-coded by redshift; and L and T dwarfs (black and red crosses, respectively) used as labels in the embedded space. Top: i − z vs. z − W1. Bottom: z − J vs. W1 − W2. While i − z vs. z − W1 shows a total overlap of the new quasars with the T dwarf population, the z − J color shows a clear distinction.