Masataka Okabe (Jikei Medical School) and Kei Ito (University of Tokyo) have devised a very nice palette that is color-blind friendly. Here, for quick reference, are the colors as RGB, Hex and CMYK values:

		R,G,B (0-255)	R,G,B (0-1)	Hex	C,M,Y,K (%)
		0,0,0	0,0,0	#000000	0,0,0,100
		230,159,0	0.902,0.624,0	#E69F00	0,50,100,0
		86,180,233	0.337,0.706,0.914	#56B4E9	80,0,0,0
		0,158,115	0,0.620,0.451	#009E73	97,0,75,0
		240,228,66	0.941,0.894,0.259	#F0E442	10,5,90,0
		0,114,178	0,0.447,0.698	#0072B2	100,50,0,0
		213,94,0	0.835,0.369,0	#D55E00	0,80,100,0
		204,121,167	0.8,0.475,0.655	#CC79A7	10,70,0,0