did a quick search and didn't see any hits for color blind here so i thought i'd post just an FYI re: color blind safe colors.
while i personally like the default color scheme, one of my users is red/green color blind and of the first three colors, there is red and green.
i am *not* an expert in this, but poking around online i found the following colors to be more accessible for him.
colors: [ "#666666", "#ff9933", "#00ccff", "#66ff33", "#336600" ]
if anyone has a better set, i'd love to see it.