After changing my colour sequence every time I looked at it, this is what I settled on. I think…

top to bottom of the individual pics

Colour 1 - El Greco
Colour 2 - Glass Bottom Boat
Colour 3 - Seawash
Colour 4 - Rainwater
Colour 5 - Turquoise

Blocked very gently it measures 62cm on 184cm.

Number 5 in 2017

From stash older than a year at cast on, were El Greco, Rainwater, and Turqiose. 902m

Yarn weight

After clue 1:
C1 - 94g, used 19g
C2 - 99g, used 14g
C3 - 82g, used 31g
C4 - 96g, used 17g
C5 - 95g, used 18g

After clue 2:
C1 - 83g, used 9g
C2 - 69g, used 30g
C3 - 68g, used 14g
C4 - 96g
C5 - 66g, used 29g

After clue 3:
C1 - 43g, used 40g
C2 - 69g
C3 - 38g, used 30g
C4 - 67g, used 29g
C5 - 66g

After clue 4:
C1 - 43g
C2 - 69g
C3 - 38g
C4 - 21g, used 46g
C5 - 38g, used 28g

After clue 5:
C1 - 31g, used 12g
C2 - 55g, used 14g
C3 - 16g, used 22g
C4 - 15g, used 6g
C5 - 27g, used 1g