From an unused root meaning to be warm, i.e. (by implication) sunburnt or swarthy (blackish) -- brown.
Englishman's Concordance
1) dark colour, darkened, dark brown or black Part of Speech: adjective A Related Word by BDB/Strong’s Number: from an unused root meaning to be warm Same Word by TWOT Number: 625a
Brown-Driver-Briggs
חוּםadjectivedarkened, dark brown or black, only of colour of sheep (in Genesis 30, J); — וכלשֶֿׂהחֿוּםבכשׂביםGenesis 30:32, ׳וְחוּם בכGenesis 30:33,35, וכלחֿוּם בְּצאֹןGenesis 30:40 (clause probably interpolated Ol Hup De We Di).
Genesis 30:32 HEB:וְכָל־ שֶׂה־ חוּם֙ בַּכְּשָׂבִ֔ים וְטָל֥וּא NAS: and every black one KJV: cattle, and all the brown cattle INT: and every one black the lambs and the spotted
Genesis 30:33 HEB:וְטָל֜וּא בָּֽעִזִּ֗ים וְחוּם֙ בַּכְּשָׂבִ֔ים גָּנ֥וּב NAS: among the goats and black among the lambs, KJV: among the goats, and brown among the sheep, INT: and spotted the goats and black the lambs stolen
Genesis 30:35 HEB:בּ֔וֹ וְכָל־ ח֖וּם בַּכְּשָׂבִ֑ים וַיִּתֵּ֖ן NAS: in it, and all the black ones among the sheep, KJV: [and] every one that had [some] white in it, and all the brown among the sheep, INT: white one the black the sheep and gave
Genesis 30:40 HEB:עָקֹ֛ד וְכָל־ ח֖וּם בְּצֹ֣אן לָבָ֑ן NAS: and all the black in the flock KJV: the ringstraked, and all the brown in the flock INT: the striped and all the black the flock of Laban
