Custom theme with quantmod library

Sounds like this might be a setting in RStudio, if you're using that.

If in RStudio: tools -> global options -> appearance -> customize.

On Wed, Jan 14, 2026 at 12:06?PM Andre Luiz Tietbohl Ramos <

Hello,

Is there a way to customize quantmod theme colors?  This great library
works fine however I rather change its color theme.  So far, I have been
able to use both white and black themes.
I tried to use the chartSeries theme command described below to no avail.
I tried even without a theme name, e.g. white or black. An example is
below,

stock.plot <- chartSeries(stock.time_interval,  ## ativo,
                          name = stock.name,
                          type = "candlestick",
                          subset='2025-07::2026-01',
                          theme = chartTheme("white", up.col='darkgreen',
dn.col='darkred',
                                             bg.col='gray',
selection.color='gray'),
                          TA = NULL
                          )

Could anyone help, please?

TIA,

--
Andre Luiz Tietbohl Ramos, PhD

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Custom theme with quantmod library

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