Deep purplish-red (7)
(Other definitions for magenta that I've seen before include "Shade of purple" , "Bright purplish-red" , "Colour named after a bloody 1859 battle in Italy" , "Purplish-pink colour" , "Reddish-purple colour" .)
<span class="explanation-format__ClueExplanation">'<span class="explanation-format__original">deep purplish-red</span>' is the definition.<br/ ><span class="explanation-format__explanation">(I've seen this in another clue)</span><br/ ><br/ >This is the entire clue.<br/ ></span>
(Other definitions for crimson that I've seen before include "Blood-red" , "Bright red" , "Microns of colour" , "Flushed" , "Blush" .)