Hair has been trending for quite some time now, but it’s now time to make a switch to one of the hottest colours this season – lavender ash-brown! While it looks similar to ash-grey, lavender ash-brown is a slightly darker shade that isn’t that difficult to pull off. The shade of lavender adds a fresh burst of colour Korean Hair that will surely shimmer under the sunlight.biggest hair colour trends, and one of the hottest K-beauty trends right now is to combine these shades into a bright ash-blonde. Numerous female Korean pop idols have dyed their hair this colour, which looks especially flattering with fair skin. Those with more tanned skin tones should opt for a darker shade of ash-blonde.