Have a hard time finding the difference between the colors

[toecorn]

im cycling my 10 gallon and i have been doing water changes to lower my nitrates so these 2 nitrite colors are from the past 2-3 days. like are they both zero or does the darker blue have some nitries in it? like theres no purple shade at all

 

[Dechi]

The second picture has a bit of nitrites, maybe 0.10.

 

[toecorn]

The second picture has a bit of nitrites, maybe 0.10.

yeah thats what i figured, it was the bright blue yesterday and now its that darker blue again