Gascolater leak?

[knute]

If I don't fly my Legend Cub for a week or so the fuel in the gascolater turns dark blue. The longer between flights the bluer the fuel. Could it be leaking really slowly and the dye concentrating in the gascolater? There are only two openings, the drain valve and the top seal. When I cleaned it at the annual there was some dye built up on the drain valve but I cleaned that off and it doesn't appear to be accumulating. Any ideas?

Thanks,

knute...

 

[Original 1]

 

[knute]

 

[deafcub19h]

 

[cubrath]

 

[Bonzo]

 

[huston marlowe]

 

[Original 1]

 

[huston marlowe]

 

[Original 1]