The collapsible legend is wrong

[NoudL]

The collapsible legend in the lower right corner gives information such as
"Group: Four of these is a medium challenge"
it says that about the light purple color which corresponds to 1/4 CR when using a party of 4 level 1 characters. However, building an encounter of four 1/4CR enemies is actually "Deadly", which the encounter builder correctly states.
I think the legend doesn't take the Adjusted XP into mind. Because 1/4CR creatures give 50 xp. 50 * 4 is 200 which would correspond to a "medium" challenge were it not for the adjusted xp rule.

[Asmor]

It's an estimation which isn't perfect. I haven't looked at the code for a long time, but it seems like the estimation is less accurate at lower levels.

I just checked with a party of 4 level 10 characters, and CR 3 is marked as pink, and 4 of them is indeed a "medium" challenge per the encounter building guidelines.

[sbards]

With a party of 4 level 10 characters, a CR 4 is marked as pink as well, however 4 of them are a hard challenge, not medium.

4 level 10 characters:
Easy: 2,400 exp
Medium: 4,800 exp
Hard: 7,600 exp
Deadly: 11,200 exp

4 CR 4 creatures:
Total XP: 4,400 (1,100 per player)
Adjusted XP: 8,800 (2,200 per player)
Difficulty: Hard
Legend Color: Pink "Group: Four of these is a medium challenge"

Looks like the legend is reading from the total xp, not the adjusted xp. I'll see if I can't fix it and get something submitted once I'm more familiar with the code base.