Method setColor

src/backend/common/chart_common.hpp:41–44

        }

        inline void setColor(const float pRed, const float pGreen,
                             const float pBlue, const float pAlpha) {
            mShrdPtr->setColor(pRed, pGreen, pBlue, pAlpha);
        }

        inline void setLegend(const char* pLegend) {
            mShrdPtr->setLegend(pLegend);