By Harry Roberts
Harry Roberts is an independent consultant web performance engineer. He helps companies of all shapes and sizes find and fix site speed issues.
Written by Harry Roberts on CSS Wizardry.
If, like me, you frequently need the official1 Core Web Vitals colours for slides and presentations, here you go:
#09ce6b
#ffa400
#ff4e42
Good
rgb(9, 206, 107)
hsl(150, 92%, 42%)
hwb(150, 4%, 19%)
Needs Improvement
rgb(255, 164, 0)
hsl(39, 100%, 50%)
hwb(39, 0%, 0%)
Poor
rgb(255, 78, 66)
hsl(4, 100%, 63%)
hwb(4, 26%, 0%)
‘Official’ as in sampled from PageSpeed Insights and web.dev. ↩
Harry Roberts is an independent consultant web performance engineer. He helps companies of all shapes and sizes find and fix site speed issues.
Hi there, I’m Harry Roberts. I am an award-winning Consultant Web Performance Engineer, designer, developer, writer, and speaker from the UK. I write, Tweet, speak, and share code about measuring and improving site-speed. You should hire me.
You can now find me on Mastodon.
I am available for hire to consult, advise, and develop with passionate product teams across the globe.
I specialise in large, product-based projects where performance, scalability, and maintainability are paramount.