title: how to increase color intensity in colorramppalette
body: <p>I am using pheatmap package in R for making heatmaps on different kinds data..and using colorramppalette for making colors but the colors are very bright.</p>
  
  <p>i want some dark colors,how can i do that?</p>
  
  <p>here is the code:</p>
  
  <pre><code>hmcols&lt;-colorRampPalette(c("white","red"))(256)
  
  pheatmap(
    test,
    color=hmcols,
    cluster_rows=FALSE,
    cluster_cols=FALSE,
    legend=TRUE,
    show_rownames=FALSE,
    show_colnames=FALSE,
    filename="a.png"
  )
  </code></pre>
  
  <p>how can i increase color intensity in colorramppalette or can i use any other heatmap package that is similar to pheatmap but produce dark color?</p>