Coffee + William Morris 'Sunflower Wallpaper' Design

The V&A Museum sell souvenirs and this coaster and mug is a typical example. The mug does not take kindly to black tea; it would have benefitted from a better glaze in production. I'm not adding milk simply to spare the crockery. Thus I try to use this mug for coffee only (and instant at that).
I used a Fuji X-E1 and again noticed how it has a problem rendering blue shades - the out-of-camera picture was a strong blue, whereas the V&A product is decidedly blue-black, like the old Quink ink shade. I tried to make it like that colour in post-processing, not altogether successfully.
The coffee was brown, but you wouldn't know it here. A bit of a waste of time really.