Exodus 35:7 Kabbalah

וְעֹרֹ֨ת אֵילִ֧ם מְאָדָּמִ֛ים וְעֹרֹ֥ת תְּחָשִׁ֖ים וַעֲצֵ֥י שִׂטִּֽים׃

and rams’skins dyed red, and sealskins, and acacia-wood;

Read kabbalistic (mystical) interpretation of Exodus 35:7: and classical mystical sources.