I bought this polish off a blog sale a few months ago and have only just got round to applying it. Its quite an odd colour to describe. Butter London describe is as "A medium tone purplish-mauve that can appear darker or lighter depending on what clothing you are wearing". While I do agree with the shade description, I haven't noticed it looking any different with different clothing.
The formulation on Butter London polishes is quite thick, although not too thick where I have trouble with application.