Evolutionary tracks of a 0.58 M_⊙ white dwarf for different atmospheric compositions on the Gaia DR3 CMD, together with the observed 100 pc sample (gray dots). Evolutionary models considering pure H and pure He envelopes are displayed as black and purple lines, respectively. Models with a He atmosphere containing traces of C, and considering the C sequence, and the C sequence −1 dex, −2 dex, and −3 dex are shown using blue, orange, green, and red lines, respectively.