Every character on Jiǎoluò Shūwū read as wen in any tone — 2 readings total across the four tones. Pick the tone you mean.
If you have the sound wen but not the character, here are the 2 characters read this way: 文 (wén, writing, culture, civil), 问 (wèn, to ask, to inquire, to ask after). They split across 2 tones, so the tone is what separates them.