Logo Best Practices: What Separates a Good Logo From a Bad One

The short answer

A well-made logo is simple enough to be recognised at a glance, distinctive enough not to be confused with competitors, legible from very small to very large sizes, and still effective in a single colour. It should also be built as clean vector artwork so it can be reproduced consistently across screens, print, signage and merchandise. A weak logo usually fails one or more of these tests. It may rely on fine detail that disappears when reduced, depend on colour or gradients to make sense, use generic imagery, or come as a file that only looks like vector artwork.

Scope note: this guide covers logo design as a general concept, not a specific brand, logo version or redesign. No particular logo, asset or case study was supplied as evidence. The points below are therefore widely accepted design principles and editorial guidance, not documented findings about any named identity. If you are evaluating a specific redesign, apply the checks below to the actual files and to statements published by the brand owner.

Core principles and how to check them

Each principle can be tested by looking at the logo itself. The value of a test is that it turns a vague impression such as 'it feels cluttered' into something observable and fixable.

Simplicity: count the distinct shapes, strokes and colours. Every element should earn its place. If removing a detail does not weaken recognition, it was probably unnecessary.
Scalability: view the logo at the smallest size it will realistically appear, such as a browser tab icon or a social media avatar. Check whether counters (the enclosed spaces in letters like 'e' or 'o'), thin lines and small gaps fill in or vanish.
One-colour performance: render the logo in solid black and in solid white on a dark background. If the mark becomes unreadable without its colours, gradients or shadows, it depends on effects rather than form.
Legibility: if the logo contains a wordmark (a name set in type), read it quickly at small size and at a distance. Watch for letter pairs that merge or tightly tracked letters that blur together.
Distinctiveness: compare the silhouette with logos in the same industry. Generic symbols such as globes, swooshes, lightbulbs or abstract people are common enough that they rarely help recognition on their own.
Appropriateness: consider whether the visual tone (geometric or organic, heavy or light, formal or playful) fits the organisation and its audience. This is an interpretive judgement, so state your reasoning rather than presenting it as fact.
Consistency: check that the logo has a defined set of versions, such as a primary lockup, a stacked or compact version and a standalone symbol, and that those versions share the same construction rather than being redrawn loosely.

Good logo vs bad logo: a side-by-side comparison

Aspect | Stronger approach | Weaker approach

Form | A few clear shapes with a recognisable silhouette | Many small details, textures or illustrative elements

Colour | Works in one colour; colour adds meaning but is not required | Relies on gradients, shadows or many colours to be understood

Small sizes | Counters and gaps stay open; a simplified symbol exists for tiny uses | Fine lines and small text fill in or disappear

Typography | Custom-adjusted or carefully chosen type with balanced spacing | Default fonts dropped in unchanged, uneven spacing, trendy novelty faces

Distinctiveness | Silhouette is ownable within its category | Generic stock-style symbol shared by many brands

Versions | Planned set of lockups built from the same master artwork | Ad hoc variations redrawn or stretched for each use

File quality | Clean vector paths, outlined type, no embedded images | Raster image placed inside a vector file, or messy, overlapping paths

Treat the table as a diagnostic, not a scoring system. A logo can break one convention on purpose and still succeed, for example a detailed heritage emblem used alongside a simplified symbol for digital use. The question is whether the design choices hold up in the places the logo actually has to work.

Checking whether a logo file is genuinely vector

Vector artwork describes shapes mathematically as paths and anchor points, so it can scale to any size without blurring. Raster artwork is made of pixels and degrades when enlarged. A file extension commonly associated with vector formats does not prove the contents are vector. Such a file can contain an embedded pixel image, live text that depends on a font you may not have installed, or poorly constructed paths. Inspect the file before relying on it.

Open the file in a vector editor and switch to an outline or wireframe view. True vector shapes appear as clean path outlines. An embedded image appears as a rectangular box.
Zoom in heavily on curves and edges. Vector edges stay crisp at any magnification, while raster content shows pixels or blur.
Check the anchor points. Smooth curves should use relatively few, well-placed points. Dense clusters of points often indicate auto-traced artwork, which tends to produce lumpy curves.
Check whether text is live or converted to outlines. Live text may render in a substitute font on another machine. Delivery files usually have type converted to shapes, with an editable master kept separately.
Look for stray elements such as hidden layers, empty paths, overlapping duplicate shapes, unexpanded strokes or clipping masks hiding extra artwork.
Confirm colour definitions. Print and screen versions may need different colour specifications, and these should be defined deliberately rather than left to whatever the software assigned.

Evaluating a redesign fairly

When comparing an old and a new logo, keep three kinds of statement separate. Observable features are things anyone can verify in the artwork, such as a heavier stroke weight, a removed gradient or a shortened wordmark. Documented claims are what the brand owner or agency says the redesign achieves, such as better legibility on mobile. These remain claims unless supported by evidence you can see. Editorial interpretation is your own judgement about whether the result feels more modern, more generic or more appropriate. All three are useful, but mixing them makes a critique hard to trust.

A practical method is to place both versions at the same sizes and in the same contexts (small icon, one-colour print, large signage mock-up) and note what changes in each. Many redesigns that look like simple flattening are responses to small-size and single-colour problems, and that kind of side-by-side view makes it visible.

A note on reuse and permissions

Finding a logo file online, in a press kit or in a shared drive does not mean you are allowed to use it. Logos are typically protected as trademarks and may also be covered by copyright, and brand owners often restrict how, where and by whom their marks can be used. Check the owner's published brand or media guidelines, or ask the owner directly, before using a logo in your own materials. This guide cannot confirm the usage terms for any particular logo.

Practical next step

Test the logo at its smallest realistic size and at large scale.
Render it in solid black and solid white and confirm it still reads.
Compare its silhouette against competitors in the same category.
Open the file in outline view to confirm it contains clean vector paths, outlined type and no embedded images.
Confirm that a consistent set of versions exists for different layouts and sizes.
Verify usage rights before reusing any logo you did not create or commission.

Evidence gap: no specific logo, redesign, brand guideline or file was supplied with this brief. This guide therefore gives no verdicts on named identities and no measured thresholds such as minimum pixel sizes or clear-space ratios. Those values are set by each brand's own guidelines and should be taken from that source.