3i logo with red hand-drawn numerals 3 and i on a blue brushstroke shape
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3i

3i Group plc is a British investment company specialising in private equity and infrastructure, headquartered in London. Its logo, created by the branding consultancy Wolff Olins, was launched in 1983, the year the company adopted the Investors in Industry name.

3i Group plc is a British investment company specialising in private equity and infrastructure, headquartered in London. The firm traces its origins to 1945, when the Industrial and Commercial Finance Corporation (ICFC) was established to provide long-term capital to small and medium-sized businesses. In 1983 the company changed its name to Investors in Industry Group plc, better known as 3i. [1]

Design and History

The 3i symbol was created by the branding consultancy Wolff Olins. Unusually for a corporate identity, the consultancy commissioned the artist Phil Sutton to produce a watercolour on which the 3i symbol was based. The new brand was launched in 1983, the same year the company adopted the Investors in Industry name. [2]

The mark consists of the number “3” and the letter “I” located in the centre of a blue circle. The number and letter are rendered in red with a black outline and then a white outline. The dot over the letter “I” takes the shape of an eye, outlined in black and white with a blue iris on a white background. [3] The UK trademark registration for the mark specifies that it is limited to the colours blue, red, black and white. [4]

The eye motif was a deliberate visual pun. Wolff Olins chose to incorporate an eye in the 3i logo, which the consultancy argued was an appropriate visual play on the word “I” in the company name. [5] The watercolour style of the mark, based on Sutton’s original artwork, gave the identity a hand-painted quality that was unusual for financial services branding at the time. [2]

Meaning and Symbolism

The name 3i derives from the company’s earlier name, Investors in Industry. [1] The eye replacing the dot of the “i” creates a direct visual link between the letterform and the English word “eye,” reinforcing the “I” in the company name. [2] The blue circle, red lettering and eye motif together form a compact, distinctive mark that has remained in continuous use since its 1983 launch. [3]

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 30/09/2026.

Colors

5 colors

  • #007DC3Blue, 70%

    RGB 0, 125, 195; CMYK 100, 36, 0, 24

    Black text 4.7:1 (passes AA)

  • #EE3424Red, 11%

    RGB 238, 52, 36; CMYK 0, 78, 85, 7

    Black text 5.2:1 (passes AA)

  • #000000Black, 9.3%

    RGB 0, 0, 0; CMYK 0, 0, 0, 100

    White text 21.0:1 (passes AA)

  • #FFFFFFWhite, 8.1%

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

    Black text 21.0:1 (passes AA)

  • #A4D7F4Blue, 1.8%

    RGB 164, 215, 244; CMYK 33, 12, 0, 4

    Black text 13.6:1 (passes AA)

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Backgrounds and sizes

Contrast and color difference

Compared with Banking and Finance

544 measured Banking and Finance logos

Only 3% of Banking and Finance logos in the archive are lettermarks.

  • Main color blue36%
  • Lettermark3%
  • Four or more colors19%

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

Structure

Logo type
LettermarkClassified by AI
Proportions
1.1 : 1Roughly square
Ink coverage
76%24% empty space inside the outline
Symmetry
Nearly symmetric78% left-right match
Outline
CircularOverall silhouette
Complexity
Detailed9 shapes, about 866 points

Tints and shades

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#007DC3

#EE3424

Typography

Lettering style: Display.

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

Free fonts in this style: Bebas Neue, Anton, Abril Fatface

Visual description

Classified by AI

Style
Hand-drawn, playful, flat
Layout
Enclosed emblem
Techniques
Letter used as symbol, badge
Text in the logo
3i

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Same main color, same industry

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