Please help! Should I use gray or black DDR4 slots?

slot *Wi-Fi *Please refer to CPU support list for details Chipset - AMD B550 Memory - Dual Channel DDR4 Memory Technology - 4 x DDR4 DIMM Slots -

EZ-Latch：PCIe Slot with Quick Release Design; Fast Networks： LAN; Extended Connectivity：Front USB-C® 10Gbs, DP, HDMI; Smart Fan 6：Features

slot maxwin88 2-Slot Thermal and Power Specs Maximum GPU Temperature 94 Maximum Graphics Card Power 120 W Minimum System Power Requirement 400 W

slot aqua DDR4 DIMM Memory Slot part of motherboard, mainboard, system board, main circuit board, or baseboard main printed circuit of computer