Color scale a fellow railfan produced showing possible color ranges for subway line map colors. Hues 170 and/or 200 are allotted for the future 2nd Ave. subway (later phases, when it goes below 63rd. Segment being constructed now will be an extension of the existing [yellow] Broadway line). Hues 152 (sea green), 272 (an even purple), 320 (an even pink) and 244 (like a cerise red) are unused. I've suggested using the deeper version of yellow (hue 56) for Bway.