Coles has L'Oréal Préférence Helsinki Permanent Hair Colour for $8.50 this week, down from $17.00, that's a straight $8.50 saving on a box that normally doesn't go cheap. Helsinki is L'Oréal's true Nordic blonde shade, and the formula covers 100% of greys while promising nine weeks of fade-resistant colour, so you're not touching up every fortnight. Woolies and IGA are both sitting at $9.50, which is fine, but if you've got a Coles nearby it's worth grabbing a couple of boxes while the half-price deal is on. Home colour that actually holds is a solid alternative to a $150 salon visit, especially with the cost of everything else right now.