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Silicon Graphics RGB Bitmap (.rgb)

.rgb file signature | image/x-rgb

Silicon Graphics RGB Bitmap is an image file format developed by Silicon Graphics, Inc. for storing raster graphics. It was used for textures, screenshots, and other computer graphics in SGI workstations and related imaging and visualization tools. The format is now largely legacy, but it is generally safe to open in modern viewers, though support may be limited, with occasional compatibility issues.

Safe

Magic Bytes

Offset 0
01 DA 01 01 00 03

Sources: Apache Tika, Gary Kessler

Extension

.rgb

MIME Type

image/x-rgb

Byte Offset

0

Risk Level

Safe

Validation Code

How to validate .rgb files in Python

Python 
def is_rgb(file_path: str) -> bool:
    """Check if file is a valid RGB by magic bytes."""
    signature = bytes([0x01, 0xDA, 0x01, 0x01, 0x00, 0x03])
    with open(file_path, "rb") as f:
        return f.read(6) == signature

How to validate .rgb files in Node.js

Node.js 
function isRGB(buffer: Buffer): boolean {
  const signature = Buffer.from([0x01, 0xDA, 0x01, 0x01, 0x00, 0x03]);
  return buffer.subarray(0, 6).equals(signature);
}

How to validate .rgb files in Go

Go 
func IsRGB(data []byte) bool {
    signature := []byte{0x01, 0xDA, 0x01, 0x01, 0x00, 0x03}
    if len(data) < 6 {
        return false
    }
    return bytes.Equal(data[:6], signature)
}

API Endpoint

GET /api/v1/rgb
curl https://filesignature.org/api/v1/rgb

See the full API documentation for all endpoints and parameters.

Related Formats

.dcx

Frequently Asked Questions

What is a .rgb file?

A .rgb file is a Silicon Graphics RGB Bitmap file. Silicon Graphics RGB Bitmap is an image file format developed by Silicon Graphics, Inc. for storing raster graphics. It was used for textures, screenshots, and other computer graphics in SGI workstations and related imaging and visualization tools. The format is now largely legacy, but it is generally safe to open in modern viewers, though support may be limited, with occasional compatibility issues.

What are the magic bytes for .rgb files?

The magic bytes for Silicon Graphics RGB Bitmap files are 01 DA 01 01 00 03 at byte offset 0. These bytes uniquely identify the file format regardless of the file extension.

How do I validate a .rgb file?

To validate a .rgb file, read the first bytes of the file and compare them against the known magic bytes (01 DA 01 01 00 03) at offset 0. This is more reliable than checking the file extension alone, as extensions can be renamed.

What is the MIME type for .rgb files?

The primary MIME type for .rgb files is image/x-rgb.

Is it safe to open .rgb files?

Silicon Graphics RGB Bitmap (.rgb) files are generally safe to open. They are classified as low risk because they primarily contain data rather than executable code. However, always ensure files come from a trusted source.