The construction of full-color fluorescence systems has received widespread attention because of their applications in lighting materials, optoelectronic materials, and fluorescent probes. However, for the full-color luminescence system based on trichromatic materials, there are no connections between materials of different luminescent colors. Herein, A new donor-acceptor dye with red fluorescence was synthesized. The dye displays excellent optical properties of short half-peak width and strong fluorescence emission. An effective energy transfer process from the dansyl donor to the acceptor was observed with a transfer efficiency of 81%. Further, dyes with green and blue fluorescence were introduced to construct a full-spectrum fluorescent system. Through exchange reactions of Diels-Alder dynamic covalent bonds, red, green, and blue luminescence can be converted. This work provides a new idea for the design of full-color fluorescent materials.