Conditional Formating Chart Points

[BKGLTS]

	A	B	C
1	Item1	-2	Station25
2	Item2	-5	Station26
3	Item3	-7	Station27
4	Item1	-8	Station28
5	Item3	-10	Station29

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Hello,

I need help please.
I have been searching the internet and cannot find this solution.
Column B is plotted on a chart as points.
I need the Item1 points to be Yellow, Item2 points Blue, Item3 points Red.
The list must be in a mixed order shown and cannot be sorted.
Column C is the Horizontal Axis.
The Vertical Axis is a scale for the Column B numbers.

Thank you,
B

 

[BKGLTS]

Here is an example of what I am trying to achieve.
The conditional colors need to be dynamic so as the data changes the colors change with it.
Colors cant be hard coded.