Ask about colour in web design and you will find bold claims: red creates urgency, blue builds trust, one green button doubled someone's sales. The truth is more modest and more useful. Colour will not rescue a weak offer, but used well it makes a website easier to understand and act on.
What colour actually does
It sets the mood. Dark, muted colours feel calm and premium; bright ones feel lively and casual. Visitors pick this up before they read anything, and it should match how you want your business to come across.
It guides attention. The eye goes to what stands out. A single, distinct colour for buttons and links tells people where to click without any explanation.
It makes you recognisable. Using the same few colours on your website, van, signage and social media helps people remember you.
What colour does not do
There is no colour that works best for everyone. The famous "button colour" tests usually show that a button which stands out from the rest of the page gets more clicks, whatever its colour. Meanings also vary between people and cultures, so treat any "colour X means Y" chart as loose guidance at most.
Simple rules that work
Keep the palette small. One main brand colour, one accent for actions, and neutrals (white, greys, a dark tone) for everything else. More than that starts to look busy.
Save your accent colour for actions. If "Get a quote" is blue, do not use the same blue for decoration elsewhere. Then blue always means "you can click this".
Check the contrast. Text must stand out clearly from its background, especially on phones outdoors. Light grey text on white and white text over a busy photo are common problems. Good contrast is also part of making a website accessible.
Do not rely on colour alone. Around one in twelve men has some form of colour blindness. Error messages, required fields and links should be clear from their wording, icons or underlines too, not only their colour.
Consider your trade. A roofer, a sauna and an accountant can all look professional, but rarely with the same palette. Look at what feels right for your customers rather than copying a competitor.
A quick test
Open your home page and squint at it. What stands out first? It should be your main message and your main button, not a decorative graphic. If everything competes for attention, the colours need tidying up.
Colour is one part of a website that feels trustworthy, alongside clear typography and real photos. If yours could do with a fresh look, get in touch.