can i use hex code for colors in arcgis pro

2 min read 24-01-2025

can i use hex code for colors in arcgis pro

Yes! You can absolutely use hex code for colors in ArcGIS Pro. This allows for precise color control and consistency across your maps and projects. This article will guide you through different methods and scenarios where using hex codes in ArcGIS Pro is beneficial.

Why Use Hex Codes?

Hexadecimal color codes (like #FF0000 for red) offer several advantages:

Precision: Hex codes provide exact color specifications, unlike relying on color pickers which can be imprecise. This is especially important for consistent branding or when replicating colors from other sources.
Reproducibility: Hex codes ensure that your colors are consistent across different platforms and software. What you see on your screen will be accurately represented in print or on other devices.
Efficiency: For creating numerous map elements with specific colors, hex codes are faster and more efficient than manually selecting colors through the graphical interface.

Methods for Using Hex Codes in ArcGIS Pro

ArcGIS Pro offers several ways to input hex codes depending on what you're styling:

1. Symbology: Layers and Features

This is the most common use case. When styling layers (points, lines, polygons), you'll typically find a color picker. Most often, you will find a way to input hex codes directly into this color picker; however, the way it is accessed can change slightly based on your layer type and the specific symbology you are using. Look for an option that may be labeled as:

Custom: This often allows for RGB and other color input methods, including hex codes.
Advanced: Sometimes hex code input is nested within advanced symbology settings.
RGB: Inputting values directly (e.g., R:255, G:0, B:0 for red) may be allowed. If this is the case, be aware that you will need to convert the hex code to these RGB values before entry.

Example: Let's say you want your points to be a specific shade of blue represented by #336699. Locate the color picker within your layer's symbology pane and directly input #336699 into the color field.

2. Color Ramps

When creating graduated color ramps, you might be able to directly input hex codes for each color stop in the ramp, depending on the method used to create the color ramp.

3. Python Scripting

For advanced customization, you can use Python scripting in ArcGIS Pro to directly manipulate symbology and apply colors via hex codes. This method is ideal for automating color assignments across multiple layers or for creating dynamic symbology.

4. Layer Files (.lyrx)

If you save your layer with specific color styles, including those applied with hex codes, those hex codes will be saved as part of the layer file. This ensures consistency when sharing or re-opening the layer.

Troubleshooting and Tips

Case Sensitivity: Hex codes are usually not case-sensitive (#ff0000 is the same as #FF0000). However, it's best practice to use uppercase for consistency.
Leading Hash (#): Always include the # symbol at the beginning of your hex code.
Color Picker Limitations: Some older color pickers in ArcGIS Pro may have limited support for direct hex code input.
Consult ArcGIS Pro Help: For the most up-to-date instructions, refer to Esri's official ArcGIS Pro help documentation. Search for "color customization" or "symbology" to find relevant information for your specific ArcGIS Pro version.

Using hex codes offers more control and consistency in ArcGIS Pro's color schemes. While the exact interface may vary slightly across versions, the underlying functionality remains the same: giving you precision and reproducibility in your cartographic work.