Issue assigning colors to negative values in gene expression heatmap

[HanaBarrett]

Please provide example datasets and the code you use. It will help me to understand your problem and help you!
I'm not sure what could be causing this issue since I am using a script that worked previously and the issue just developed. Basically, when I use ColorRamp2 to assign the colors to my gene expression values (cell_wall_genes) it doesn't seem to work correctly, so when I add the colors to the heatmap it causes an error.

Color assigning lines:
col = colorRamp2(c(-3, 0, 3), c("blue", "white", "red"))
cols1 <- brewer.pal(11, "Paired")

Short segment of dataset for reference:
Index,GeneID,Cell_wall_function,Notes,product_name,log2_FC,pvalue
7534,gene_7038,Other,,Fasciclin and related adhesion glycoproteins,5.164,0
10546,gene_9853,Chitin,,Chitin synthase-domain containing protein,-4.0,4.54E-10

Heatmap code:
log2FC2 <- as.matrix(subset(cell_wall_genes,select=c(Cell_wall_function,log2_FC)))
GeneID2 <- as.matrix(subset(cell_wall_genes,select=c(GeneID)))
rownames(log2FC2) = GeneID2

ht1 = Heatmap(log2FC2,Log2FC, name = "Expression",
row_order = sort(Cell_wall_function),
col = col,
row_km = 5,
show_row_names = TRUE,
show_column_names = FALSE)

draw(ht1, row_title = "Genes", column_title = "DEGs associated with cell wall remodeling (p<0.05)")

Error text comes up when I run the ht1= line:
Error in col2rgb(na_col, alpha = TRUE) :
numerical color values must be >= 0, found -4