Renae's Sentinel warband is part of the Iron Legion.
Blue is by standard just an accent colour for armour within Iron Legion - but this particular warband elected to paint their entire armours with it.
Why? Because the blue is less reflective than the shiny silver. Really good for missions that require at least a little more stealth and caution - especially in the perpetual twilight of the Brand, against the dark skies.
How? Iron Legion may sneer at non-regulation colours. But Renae's warband are veterans, in active service with the Sentinels since the founding of the order. Nobody dares argue with them.
Not even their Centurion.

And hence, the "Blues" march on.
Proudly wearin' their colours.

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Surprise gift by  Sadira

Art made by  Sayna

Renae belongs to me.