Shūbāo lǐ chángbèi jǐ zhī bùtóng yánsè de yíngguāngbǐ.
She keeps a few highlighters of different colors in her school bag.
Tips
memory
荧 originally ‘firefly’, came to mean ‘glow / fluorescent’. 荧光 (fluorescence) + 笔 (pen) — the pen that glows, just like the pigment on a screen (荧屏 = fluorescent screen).