It's Centred That
Test your skills and judge whether the dots are really in the middle of the shapes.
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It's Centred That (supremo.co.uk/designers-eye/) is a delightful interactive design test from Supremo (UK design agency) — 'test your skills and judge whether the dots are really in the middle of the shapes.' Interactive design perception test challenging your eye for optical centering across various shapes (triangles, circles, asymmetric shapes) where mathematical center often differs from optical (visually-perceived) center. Multiple shape variations, instant feedback on judgments, fun + educational quiz format, free to play through, sharable results, no signup required. The genuine education value is that optical centering is a real design skill — typography + icon placement + UI element alignment all benefit from understanding when to override mathematical centering for visual balance (Apple's icons famously use optical centering for visual balance vs pixel-precise placement). Sits in design education landscape alongside Laws of UX (covered earlier — Jon Yablonski's UX heuristics reference covering broader UX psychology), Design Matters + Design Details podcasts (design conversation), Refactoring UI book (practical UI craft by Adam Wathan + Steve Schoger), and various design education resources. Distinguished from Laws of UX (comprehensive UX heuristics reference for psychological principles) by single-purpose interactive perception test for one specific skill, distinguished from design books (Refactoring UI + Don't Make Me Think + About Face) by interactive quiz format vs text learning, distinguished from design podcasts (Design Matters + Design Details) by interactive engagement vs audio learning, distinguished from design courses (Frontend Masters + Egghead + Udemy + various design platforms) by quick free quiz vs structured curriculum. Free + no signup; Supremo publishes as design marketing + community contribution. Best for designers learning + practicing optical centering judgment through interactive quiz format (real design skill that matters for typography + icon placement + UI alignment), senior designers demonstrating optical centering concept to junior designers + students through engaging interactive example, designers testing their visual perception abilities through fun quick quiz that reveals where their eye matches mathematical vs optical center, and designers + design enthusiasts looking for fun educational content combining entertainment + real design skill education. Skip for comprehensive design education where Laws of UX + Refactoring UI + design courses cover wider scope across UX psychology + visual craft + various design topics, if optical centering doesn't matter for your work (some design contexts don't need this precision), if you already have strong optical centering judgment from years of experience (entertainment value remains but education value drops), or if you don't have a few minutes to spare for fun design education (the quiz is short but doesn't add value without engagement). One of those delightful indie design education resources in 2026 — single-purpose + well-executed + free + genuinely fun + educational; the optical centering skill is real (Apple's icons famously use optical centering) and the quiz format is engaging; worth trying for fun + the education value about optical vs mathematical centering.
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About
Test your skills and judge whether the dots are really in the middle of the shapes.
How indie founders use It's Centred That
Optical centering practice
Designers learning + practicing optical vs mathematical centering judgment through interactive quiz format.
Design skill demonstration
Senior designers demonstrating optical centering concept to junior designers + students through engaging interactive example.
Visual perception test
Designers testing their visual perception abilities through fun quick quiz that reveals where their eye matches mathematical vs optical center.
Design education entertainment
Designers + design enthusiasts looking for fun educational content combining entertainment + real design skill education.
It's Centred That (supremo.co.uk/designers-eye/) is a delightful interactive design test from Supremo (UK design agency) — 'test your skills and judge whether the dots are really in the middle of the shapes.' Different from typical design education tools, It's Centred That is a quick interactive quiz that tests your visual perception of centering across various shapes (triangles, circles, asymmetric shapes) where mathematical center often differs from optical (visually-perceived) center. What you get: interactive design perception test challenging your eye for optical centering, multiple shape variations where mathematical center vs optical center diverge (triangles especially — optical center is offset from mathematical center because of mass distribution), instant feedback on your judgments, fun + educational quiz format, free to play through, sharable results. The genuine education value is that optical centering is a real design skill — typography + icon placement + UI element alignment all benefit from understanding when to override mathematical centering for visual balance. Where It's Centred That fits in design education: this is a focused single-purpose quiz vs comprehensive design education resources. Laws of UX (covered earlier — Jon Yablonski's UX heuristics reference) covers broader UX psychology. Design Matters + Design Details podcasts cover design conversation. Refactoring UI book covers practical UI craft. It's Centred That is a focused interactive demonstration of one specific design skill — useful for designers learning + practicing the optical centering judgment. Where it's not for you: if you want comprehensive design education, broader resources (Laws of UX + Refactoring UI + design courses) cover wider scope. If you don't care about typography + icon centering precision, this quiz won't add value. If you already have strong optical centering judgment from experience, this is more entertainment than education. It's Centred That is best for designers learning + practicing optical centering specifically — fun + educational + quick. Pricing: free. Supremo publishes It's Centred That as design marketing + community contribution. Honest take: It's Centred That is one of those delightful indie design education resources — single-purpose, well-executed, free, genuinely fun + educational. The optical centering skill is real (Apple's icons famously use optical centering vs mathematical centering — visual balance vs pixel-precise placement) and the quiz format is engaging. Worth trying for fun + the education value about optical vs mathematical centering. Bookmark for the next time you need to remind yourself or colleagues about optical centering in design work.
Pricing
Free
- ✓Interactive design perception test
- ✓Multiple shape variations
- ✓Instant feedback on judgments
- ✓Sharable results
- ✓No signup required
Frequently asked questions
Is It's Centred That free?
Yes — completely free, no signup required. Supremo publishes as design marketing + community contribution.
What is optical centering?
Optical centering is positioning visual elements at their visually-perceived center rather than mathematical center. Asymmetric shapes (triangles, irregular icons) have different mathematical center vs visual center — mathematical centering can look 'off' to the eye. Apple's icons famously use optical centering for visual balance. The skill is real + matters for typography + icon placement + UI alignment.
Why is the test interactive?
Interactive format makes the optical-vs-mathematical centering distinction immediately tangible — you make judgments + see whether your eye matched mathematical center or optical center. More engaging than text explanation + better for actually building the optical centering judgment skill.
Who created It's Centred That?
Supremo, a UK design agency. They publish It's Centred That as design marketing + community contribution — a clever way to demonstrate design expertise while contributing useful educational content.
What's the practical use of this skill?
Typography placement (especially when combining elements with different visual weights), icon centering in buttons + cards, logo placement, UI element alignment where mathematical centering looks visually 'off', and any design context where visual balance matters more than pixel precision. Common in mature design system work + icon design + careful UI craft.
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