Is there any R color function for getting the raster raster image so attractive?

I used the code for my raster image, but most of the image covers the same color. Is there any way to divide the color and make the image more attractive? Please, help me to do that.

poc1 <- raster("")
poccol <- colorRampPalette(c("lightgreen", "green", "orange", "red", "darkred","yellow","purple", "blue"))
ma.area <- extent(80, 96, 5, 25)
ma.poc1 <- crop(poc1, ma.area)
plot(ma.poc1, zlim=c(10,600), col=poccol(100))
The image I gotRplot18 ``

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