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What Are the Core Principles of User Experience (UX) Design?

What is user experience (UX) and why does it matter to marketers?


User experience, or UX, is the degree to which your website helps people achieve their goals easily and enjoyably, from finding an answer to booking a demo. Marketers should care because clear hierarchy, readable content, sensible spacing and obvious next steps reduce friction and increase conversion. On HubSpot, these decisions translate directly into measurable outcomes such as form completions, demo requests and influenced pipeline, which means good UX is both a creative discipline and a commercial lever.

How does visual hierarchy guide visitors to what matters most?


Visual hierarchy orders information so that a visitor’s eyes land on the most important elements first and then move through the rest of the content in a logical sequence. When the main heading, supporting subheadings, key benefits and primary call-to-action are visually prominent and well organised, the page feels intuitive, confidence rises and visitors are more likely to progress. Clear heading levels also help search engines understand the topic and structure of your page, which improves discoverability as well as readability. In HubSpot, a theme’s design tokens and brand settings can enforce the size, weight and spacing rules that maintain consistent hierarchy across every page.

Why does whitespace improve clarity and performance?


Whitespace, or negative space, is the breathing room around text and components that prevents visual crowding and reduces cognitive load. Pages that try to cram too much into a small space feel overwhelming and increase the likelihood of a bounce, whereas generous spacing helps people scan, understand and act without fatigue. Whitespace also supports accessibility by improving focus and target size, and it often leads to better perceived quality because the layout feels deliberate rather than cluttered. When spacing scales are baked into a component-based theme, marketers achieve clean, premium layouts by default without manual tweaking.

How can you make your content effortless to read?


Readable content uses high contrast between text and background, short paragraphs and clear subheadings to make scanning effortless. Good practice includes maintaining a comfortable line length, typically in the range of roughly 45 to 75 characters per line for body copy, because this reduces eye strain and helps readers keep their place (Baymard Institute, https://baymard.com/blog/line-length-readability). Keeping paragraphs to three or four lines and using plain language principles ensures your message lands quickly for busy readers. The World Wide Web Consortium’s WCAG 2.1 guidelines recommend a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text, which is a practical standard for legibility you can test and enforce in your theme (W3C, https://www.w3.org/TR/WCAG21/#contrast-minimum).

How do clear calls-to-action reduce friction and lift conversions?


Clear calls-to-action, or CTAs, reduce friction by telling visitors exactly what to do next and why it is valuable, while a consistent visual style makes the primary action easy to recognise wherever it appears. Action-oriented labels such as “Get your free guide” or “Book a consultation” set expectations and increase intent, and a prominent, contrasting button ensures the action is obvious without being aggressive. When every page concludes with a relevant next step that aligns to the visitor’s stage, fewer sessions end in dead ends and more progress into enquiry or purchase. On HubSpot, contextual CTAs and smart content can adapt that next step automatically for different segments using CRM data, which increases relevance without adding authoring complexity.

How can a component-based theme help non-designers apply these UX principles?


A component-based theme encodes hierarchy, spacing, contrast and CTA patterns into reusable modules so non-designers can assemble pages that remain consistent, accessible and on-brand. Because the rules live inside the theme rather than in a PDF guideline, marketers can focus on message and offer while the system applies the correct typography, spacing and colours automatically. Parameters in modules provide safe flexibility where it matters, such as swapping imagery or choosing a layout variant, while guardrails prevent accidental changes that would undermine quality. In HubSpot, this approach turns UX best practice into muscle memory for your website, which means every new page inherits good design by default.

How should you measure whether your UX choices are working?


You should measure UX in terms of comprehension, behaviour and business outcomes. Comprehension is reflected in readability checks, contrast pass rates and sensible line lengths that align to established standards. Behaviour is visible in scroll depth to key sections, time on section, internal link engagement and CTA click-throughs that show whether people are progressing. Business outcomes are captured in form start and completion rates, demo or consultation requests, and the pipeline influenced by pages that adopt the improved design patterns. Comparing these metrics against a pre-change baseline and running A/B tests on headings, layout density and CTA copy will demonstrate whether your UX changes are genuinely improving performance.

What are the best next steps to put this into practice on HubSpot?


The best next step is to select one high-impact page and apply a focused set of improvements to headings, spacing, contrast and the primary CTA, then measure the lift in engagement and conversion. Once the pattern proves effective, you should move those rules into your HubSpot theme and modules so future pages adopt them automatically and inconsistencies do not creep back in. With the foundations in place, you can introduce contextual CTAs and smart content to adapt messages by lifecycle stage, and build a short authoring playbook so marketers create new pages confidently. This incremental approach delivers quick wins while building a robust, scalable standard for the whole site.

How does Struto help marketers implement UX best practice on HubSpot?


Struto helps by providing a component-based theme built for HubSpot, the strutoCX Pro Pack, which encodes hierarchy, spacing, contrast and CTA patterns into accessible, high-performance modules that marketers can use without developer dependence. Struto delivers this using the Guided Deployment Framework, a fixed, outcome-led process that starts with measurable objectives, codifies brand tokens and global styles, builds and documents a minimum viable component library, and trains authors to compose high-quality pages at speed. As your requirements evolve, Struto extends the same foundation into strutoCX Portals for advanced, CRM-connected experiences, ensuring UX consistency spans the entire customer journey on HubSpot.

Frequently asked questions

What is the simplest definition of UX for a marketing context?


User experience is how effectively and enjoyably your audience can achieve their goals on your website, which for marketers means helping people find answers quickly and complete valuable actions with minimal friction.

Do users read web pages word for word or do they scan?


Most users scan web pages, prioritising headings, summaries and visual cues, which means clear structure and scannable content significantly improve comprehension and task success (Nielsen Norman Group, https://www.nngroup.com/articles/how-users-read-on-the-web/).

What contrast ratio should I aim for to keep text legible?


You should aim for at least a 4.5:1 contrast ratio for normal text and 3:1 for large text according to WCAG 2.1, because these thresholds help maintain legibility for the majority of users, including those with visual impairments (W3C, https://www.w3.org/TR/WCAG21/#contrast-minimum).

How long should lines of text be for comfortable reading on the web?


A common recommendation is approximately 45 to 75 characters per line for body copy because this reduces eye strain and helps readers maintain their place, especially on content-heavy pages (Baymard Institute, https://baymard.com/blog/line-length-readability).

How many H1s should a page have and why?


A page should have a single H1 because it identifies the primary topic for both humans and search engines, while H2s and H3s organise supporting ideas into logical, scannable sections that improve comprehension and discoverability.

Should every page include a primary call-to-action?


Every page should include a clear primary call-to-action that is relevant to the visitor’s context, because a defined next step reduces decision fatigue and channel drop-off, which increases the likelihood of conversion.

Can marketers implement these improvements in HubSpot without coding?


Marketers can implement most improvements without coding when a component-based theme is in place, because the theme enforces typography, spacing and CTA patterns while smart content and contextual CTAs adapt messages in the editor.

Will whitespace and larger type make my pages feel too long?


Whitespace and larger type typically make pages feel clearer rather than longer because they improve scanning and reduce fatigue, which increases the likelihood that visitors will reach and act on the key message.

How quickly should we expect to see results from UX improvements?


You can often see results within a single iteration cycle once you improve hierarchy, contrast and CTAs on a high-traffic page, and a component-based rollout spreads those gains to other pages while keeping measurement consistent.

Sources and further reading


W3C, WCAG 2.1 contrast minimums: https://www.w3.org/TR/WCAG21/#contrast-minimum
Nielsen Norman Group on scanning behaviour: https://www.nngroup.com/articles/how-users-read-on-the-web/
Baymard Institute on optimal line length: https://baymard.com/blog/line-length-readability
GOV.UK guidance on plain English and readability: https://www.gov.uk/guidance/content-design/writing-for-gov-uk
HubSpot smart content overview: https://knowledge.hubspot.com/website-pages/create-smart-content

Next steps


If you want a quick, practical starting point, you can request a 30‑minute UX Tune‑Up on your highest‑traffic page to identify and implement the biggest gains in hierarchy, spacing, contrast and CTA clarity. If you want to standardise best practice across your site, you can book a short demonstration of the strutoCX Pro Pack to see how a component-based theme on HubSpot lets marketers ship readable, on-brand pages at speed. If you are ready to embed these improvements into your operating model, you can start a Guided Deployment to implement the theme, launch a measured pilot and equip your team to maintain UX quality with confidence.