וְחֵ֤שֶׁב אֲפֻדָּתוֹ֙ אֲשֶׁ֣ר עָלָ֔יו כְּמַעֲשֵׂ֖הוּ מִמֶּ֣נּוּ יִהְיֶ֑ה זָהָ֗ב תְּכֵ֧לֶת וְאַרְגָּמָ֛ן וְתוֹלַ֥עַת שָׁנִ֖י וְשֵׁ֥שׁ מָשְׁזָֽר׃
And the skilfully woven band, which is upon it, wherewith to gird it on, shall be like the work thereof and of the same piece: of gold, of blue, and purple, and scarlet, and fine twined linen.
Read kabbalistic (mystical) interpretation of Exodus 28:8: and classical mystical sources.