As an example, I might want to use the following rule to color the cells:

(edited to un-trivialize)

1. Blue if > 4
2. No fill if <= 4 and >= 3.5
3. Yellow if >= 3 and < 3.5
4. Orange if < 3

[Create tables with conditional formatting with RMarkdown + knitr](https://stackoverflow.com/questions/15403903/create-tables-with-conditional-formatting-with-rmarkdown-knitr)
doesn't help me because I don't just want to highlight cells satisfying one set of criteria.

Example rmd:

```
---
title: "Untitled"
output: html_document
---

```{r, message = FALSE, results = "asis"}
library(knitr)
library(dplyr)
head(iris) %>% kable
```

```

I'll take a solution utilizing `DataTables` if that's what it takes