Only slightly brownish(it had been completed with fresh DOT 4 fluids over time). The guilty one was the gasket, not the fluid(not sure if the master cylinder or slave cylinder gasket, I've told them to change both).

~Nautilus

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1990 260E Sportline (that's 300E 2.6 for our American friends) -> sold
2001 E320 4Matic Elegance -> my Dad's daily drive
2005 Seat Leon FR 1.8T