法界次第初門 1.76

1.76

二、色。有形質礙之法，謂之為色。是十入及一入少分，皆是質礙之法，並無知覺之用。既異於心、意、識法，故稱為色也。

Second, rūpa (form). Dharmas that have shape and material obstruction are called "form." These are the ten āyatanas and a small portion of one āyatana; they are all materially obstructive dharmas and entirely lack the function of conscious perception. Since they differ from the dharmas of citta, manas, and vijñāna, they are called "form."