The plume appears to be a combination of brown ash and white steam.
From the scienceblogs.com
The brown ash plume reaches high above the clouds covering much of the scene, and casts a dark shadow towards the southeast.
From the telegraph.co.uk
It is a liquid catalyst that turns what would be harmful creosote deposits into a harmless light brown ash, similar to what an oil-fired heating appliance would generate.
From the dailyherald.com
The black or dark brown lava and ash erupted begins to turn white within a few hours.
From the en.wikipedia.org
She came back with gloves and a shovel and scooped the ash into a brown paper bag.
From the signonsandiego.com
The bark is exfoliate, peeling in long strips of ash brown, making for an eye-catching display.
From the dispatch.com
He had ash-brown hair, light-colored eyes and a light mustache.
From the thenewstribune.com
A true-colour image of a wide ribbon of brown volcanic ash passing over South Africa captured by NASA's Terra satellite on June 12, 2011.
From the smh.com.au
You have blue, grey or cool brown eyes and ash tones to your hair, be it blonde, white, grey, salt and pepper, dark brown or black.