Spartans in white? Surely not!

[Paullus Scipio]

The term is therefore a very useful catch-all phrase enabling the Spartans to cleverly conceal the peculiar strata of their society, into one seemingly homogeneous whole.

Indeed! However,this whole was not homogenous in status,and thus could not be homogenous in look,so since they fought all together,their battle line as the army of Sparta would not be homogenous either.

Khaire
Giannis

I seem to recall that at one battle (Sphacteria? ) Spartan(Homioi) dead could not be distinguished from others ( I am in Europe currently and away from my sources! ), which argues that they were homogenous - either all alike in uniform or, more likely in my view, that none wore 'uniform' and that they were homogenous because all were individually dressed.....