F5 Logo
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F5

F5, Inc. is an American technology company headquartered in Seattle, Washington, specializing in application delivery networking and security. Incorporated on February 26, 1996, it dropped Networks from its name in 2021, becoming F5, Inc.

F5, Inc. is an American technology company headquartered in Seattle, Washington, specializing in application delivery networking and security. The company was incorporated on February 26, 1996, in the State of Washington [1]. In 2021, the company officially dropped “Networks” from its name, becoming F5, Inc., to reflect its evolution beyond load balancing into broader application security and delivery services [2].

Design and History

The F5 logo is described by the company as “the key building block of our identity and the primary visual element that identifies us” [3]. The mark consists of a red circle containing the white lettering “F5,” with the primary logo using two colors: red and white. When placed on a background other than white, the “F5” text should appear in white [3].

According to F5’s official logo guidelines, the mark gained strong brand recognition among customers, who identified it as the “glowing red ball” on servers in their data centers. Until the 2010s, the logo was rendered as a three-dimensional object; it has since been simplified and flattened for a more modern aesthetic [3]. The company’s guidelines specify that the logo should be surrounded by clear space equal to half the height of the red circle [3].

F5’s legal name was “F5 Networks” for many years, but the company has moved away from using “Networks” in recent years, preferring simply “F5” unless legal implications require the full name [3]. The 2021 name change to F5, Inc. marked a significant departure from the company founded in 1996, signaling a shift away from the confines of “networks” toward a broader application-focused identity [2].

Meaning and Symbolism

F5’s official guidelines do not document a specific symbolic meaning for the red circle or the “F5” lettering. The company’s own description focuses on the practical recognition the mark achieved: customers identified the logo as the “glowing red ball” on servers in their data centers, a recognition that contributed to the brand’s identity in enterprise environments [3].

Typography and Design

F5’s logo guidelines specify usage rules for the mark, including clear space requirements equal to half the height of the red circle and a minimum size of 0.375 inches, below which the registered trademark symbol may be removed because it would not be readable [3]. The company’s guidelines do not publicly document the specific typeface used in the logo or attribute the design to a particular designer or agency.

Logo Index is an independent educational archive covering logos, visual identities and graphic design history. All trademarks and brand assets remain the property of their respective owners.

Logo data

Measured from the original SVG file on 01/10/2026.

Colors

3 colors

  • #E21D38Red, 56%

    RGB 226, 29, 56; CMYK 0, 87, 75, 11

    White text 4.7:1 (passes AA)

  • #FFFFFFWhite, 43%

    RGB 255, 255, 255; CMYK 0, 0, 0, 0

    Black text 21.0:1 (passes AA)

  • #F3A3AEPink, 1.3%

    RGB 243, 163, 174; CMYK 0, 33, 28, 5

    Black text 10.7:1 (passes AA)

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Backgrounds and sizes

Contrast and color difference

Compared with Technology

455 measured Technology logos

Only 2% of Technology logos in the archive are lettermarks.

  • Main color red6%
  • Lettermark2%
  • 3 colors7%
  • Most common main color here: black40%

From measured files, not tags. Updated 28/10/2026.

Structure

Logo type
LettermarkClassified by AI
Proportions
1.0 : 1Roughly square
Ink coverage
78%22% empty space inside the outline
Symmetry
Mirror-symmetric100% left-right match
Outline
CircularOverall silhouette
Complexity
Moderate2 shapes, about 144 points

Tints and shades

Click a step to copy

#E21D38

#F3A3AE

Typography

Lettering style: Serif, lowercase.

This is a style class, not the exact font. The font has not been documented.

Free fonts in this style: EB Garamond, Libre Caslon Text, Playfair Display

Visual description

Classified by AI

Symbol shows
Circle containing f5
Style
Flat, minimal, geometric
Layout
Name inside the symbol
Techniques
Letter used as symbol, negative space
Text in the logo
f5

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