Chrome faucets do not need replacing just because you want brass accessories. The two can belong in the same bathroom when each has a clear role: chrome around the water fittings, a warmer metal in the details you see and use elsewhere. The difficulty comes when every corner asks for attention and the difference starts to look accidental.
Judge the amount of metal you see, not the number of fittings. A long rail, a small hook, and a dispenser do not carry equal visual weight. Their background, reflection in a mirror, and relationship to one another matter more than a fixed ratio of brass to chrome.
Begin with what the room already shows
Look at the bathroom from the doorway before comparing samples. A chrome faucet may be one small shape against a white basin, or part of a larger group that includes exposed shower fittings and a broad mirror. Keeping that group coherent gives the existing metal a clear place. It also makes it easier to decide where brass would add something, rather than simply add another finish.
A hook beside a towel can introduce that difference quietly. In Ghidini 1849's bathroom selection, the Alba brass robe hook has a round base and a curved hook with rounded ends. In Bronze Satin Brass, it gives a small warm accent beside the towel. The towel partly covers the object during use, so the metal reads differently from an equally sized detail left fully exposed beside the faucet. That makes this a useful starting point when you want contrast without changing the whole basin arrangement.

Separate color from shine
Warm and cool tones are only half of the comparison. Polished chrome catches sharp reflections, while a satin brass surface presents the warmer color differently. Pale stone, glossy tiles, and the mirror can make the difference more noticeable; timber or a matte painted wall may give the warm metal a less reflective setting. Neither combination determines a style by itself.
Beside the basin, the Adele wall-mounted soap dispenser offers another way to judge the relationship. Its white ceramic container forms most of the visible body; brass appears in the support ring, wall attachment, and pump. The ceramic can relate to a white basin while the selected Bronze Satin Brass details establish the warmer note next to a chrome faucet. It is a contrast with a shared material in between, rather than two metal surfaces competing directly.
The dispenser also shows why overall object size can be misleading. A larger white container need not introduce more visible brass than a smaller all-metal accessory. Consider which surfaces catch your eye together. A pronounced metal outline near the faucet deserves more attention than a partly concealed hook across the room.

Repeat a relationship, not every accessory
One isolated brass object can look like a later addition. A second related detail can make the choice easier to understand, but repetition is most useful when it follows the room's arrangement. It does not require changing every fitting or scattering small warm accents over every wall.
The Adele tempered-glass and brass shelf with safety rail changes the scale of that repetition. Its transparent shelf leaves the wall visible, while the brass rail draws a longer horizontal line. In the same Bronze Satin Brass finish as the dispenser, it can connect the basin area to adjacent storage without making the whole shelf appear solid metal. That line has more presence than the hook's small round base, so its position matters: placed among several other strong horizontal edges, it may make the view busier rather than calmer.
Let the fittings belong to useful groups. A dispenser at the basin, a hook beside the towel, and a shelf serving the storage area can share a finish while doing different jobs. The visual connection comes from the recurring warm metal, rounded details, and clear placement. A mirror may show several of them at once, so include that reflected view in the decision.

Leave some parts of the room quiet
Mixing metals works best when the surrounding materials give the difference room to be seen. In a bathroom already full of patterned tiles, ornate furniture, and strong contrasts, one consistent metal may be the more convincing choice. Brass is an option, not a requirement for making the room feel finished.
If you keep chrome and introduce brass, decide which area carries the stronger statement and let the other details support it. A coherent bathroom does not need every metal to match. It needs the contrast to make sense in the view you encounter every day.