Color tool

The Color tool searches various KEGG objects, including genes, KOs, EC numbers, metabolites and drugs, against KEGG pathway maps. Found objects may be marked in any combination of background and foreground colors.
(New feature) The graphical user interface of the KEGG pathway map viewer now allows advanced coloring of map objects including split-coloring and gradation.

Search mode:   Reference   hsa   other org

Enter KEGG identifiers followed by color specification

Or upload file:

Default bgcolor:

Use uncolored diagrams

Include aliases (for hsa and other org modes)

Split boxes for multi-coloring



Query data format
Two-column dataset (space or tab separated) with KEGG identifiers in the first column and color specification in the second column, which takes the form of "bgcolor,fgcolor" (no spacing) where bgcolor and fgcolor may be specified by color name such as red or hex rgb such as #ff0000. When the same identifier appears multiple times with different color specifications, the last one is used. By checking "Split boxes for multi-coloring", a box is split to display multiple colors specified in the dataset.
Search mode
Search mode Target DB Prefix Type KEGG identifier Alias
Reference Pathway map Reference pathway K/R/EC number
C/G/D number
hsa Pathway hsa Human-specific pathway hsa gene ID
C/G/D number
K/EC number
other org Pathway <org> Organism-specific pathway gene ID
C/G/D number
K/EC number
Use of gene symbols
The use of gene symbols (in the Gene name field of GENES entry) as aliases is no longer supported, because many-to-many relationships may result in erroneous links to KEGG identifiers.

As an exception, the official symbols for hsa (Homo sapiens) can be used as primary identifiers, which are automatically converted to KEGG identifiers by using the one-to-one correspondence between NCBI Gene IDs and HGNC symbols. Note, however, that the correspondence is updated every three months of RefSeq releases. It is highly recommended to always use KEGG hsa gene identifiers.

Last updated: November 1, 2022