By default the label_colour argument is set to NULL, and is interpreted as a CSS value of "inherit". However, you can override this and set the card label colour manually. The label_colour argument will accept any valid colour string recognised by R. The input can either be a single colour or a vector assigning each card a different label colour:
galleries[1:3, ] %>%
cards(
title = long_name,
text = blurb,
link = gallery_url,
image = image_url,
label_colour = c("#d6cadd", "antiquewhite", "#c4d8e2")
)
Ash Cloud and Blood
Simulated watercolours in ggplot2 using the transparent polygon method
Ghosts on Marble Paper
Abstract landscapes generated using ambient
Ice Floes
Abstract icebergs generated using ambient
For inset layouts, the colour needs to be partly transparent if you want the image underneath to show through:
galleries[1:3, ] %>%
cards(
title = long_name,
text = blurb,
link = gallery_url,
image = image_url,
layout = "inset-bottom",
label_colour = c("#d6caddaa", "#ffffffaa", "#c4d8e2aa"),
breakpoint = 5
)