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You removed the legend, what do the colours mean?
Oh sorry. Blue line is 2023. The red dotted line is "record minimum" in 2012. The rest are each year from 1979. The ones higher up, with a larger extent, are older.
There's a tab top left to switch between Arctic and Antarctic: https://nsidc.org/arcticseaicenews/charctic-interactive-sea-ice-graph/
Each color is a different year. Here is is the graph from NSIDC:
From here (clicking on "Antarctic daily images" button on the right):
Given the bottom axis is months and there is only one line incomplete I'd guess the blue line is "2023"
It does look that way, but a diagram is pretty useless if the only way to interpet it is "guess"
And there are more lines, it would be interesting to know what years the other lines are, to maybe see a trend
