The main point is that is is a Hydraulic fluid, NOT an ATF.... Does anyone know whether the colour difference is constant across brands? Or to put it another way a certain spec is always green across different makes. Eg a tutela GI/R equivalent specification but under another brand like Castrol, Gulf, Millers, Shell?
The Millers CHF is thicker, haven't found anything from Castrol, Gulf or Shell yet.
Closest I've found so far is Pentosin CHF 11S:
For comparison, GI/R details here: