Colour in Slides: Building a Palette That Works on Screen

Colour is one of the fastest ways to make a deck look considered, and one of the fastest ways to make it look messy. A good presentation colour palette does two jobs. It makes your slides feel like they belong to your brand. And it tells the viewer where to look. Most palettes do the first job and forget the second.

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Colour can make a deck look considered, or make it look messy. Here's how to build a small palette that reads well on laptops, phones and in video.

Most slide palettes trip over the same things: too many colours, brand colours everywhere, weak contrast, and colour carrying meaning on its own.

Think in roles, not favourite colours. A background, text, a couple of greys, one accent for what matters and a quiet support colour. That's five to seven in total.

Colours that look fine on your monitor can wash out on a projector. Aim for 4.5 to 1 contrast for body text, and label your chart series directly.

Take a chart with six bars in six brand colours. Grey out five, put the north in the accent, and the slide says exactly one thing.

Solid, distinct colours survive compression. On Pro, a.i. directs your video, landing your accent on the word that names it. Try Basic first at powerpoint2vid.com.

This guide shows you how to build a small, practical palette that reads well on laptops, phones and in video, without needing a design background.

Why most slide palettes go wrong

The usual problems are easy to spot once you know them:

• Too many colours. Every chart series, icon and heading gets its own shade, so nothing stands out.
• Brand colours used everywhere. A bright brand colour as a full background can be tiring and hard to read on.
• Low contrast. Pale grey text on white, or mid-blue text on dark blue.
• Colour carrying meaning alone. Red and green used to show good and bad, with no label.

Fixing these starts with having fewer colours, each with a clear job.

A simple structure for a presentation colour palette

Think of your palette as a set of roles, not a list of favourite colours.

Role	What it’s for	How many
Background	Slide background	1, maybe 2 (light and dark)
Text	Headlines and body copy	1 dark, 1 light
Neutral	Secondary text, gridlines, de-emphasised data	1 to 2 greys
Accent	The thing you want people to notice	1
Support	Secondary highlights or a second data series	1, used sparingly

That’s five to seven colours in total. It’s enough to build every slide you’ll need.

The background

Most slides work best on a near-white or a very dark background. Pure white can feel harsh on screen, so an off-white or very light grey is often easier on the eyes. A dark background can look polished in video, especially for launch or product content. Pick one as your default and use the other for section dividers.

Text colours

Choose a dark text colour for light backgrounds and a light one for dark backgrounds. Near-black (a very dark grey or navy) often looks softer than pure black while keeping strong contrast.

Neutrals

Greys do a lot of quiet work. Use them for axis lines, source notes and any data you want to show but not highlight. A grey bar next to an accent-coloured bar instantly tells the viewer which one matters.

The accent

This is the most important colour in the palette. It’s usually your strongest brand colour. Use it only for the thing on each slide that deserves attention: the key bar in a chart, one word in a headline, a call-to-action button. If the accent is everywhere, it stops working.

Building your palette step by step

1. Start with your brand. Take your primary brand colour as the accent candidate.
2. Check it on screen. Some brand colours, especially very bright yellows or pale tints, don’t work as text or on white. Find a slightly deeper version if needed.
3. Pick your background and text. Off-white and near-black is a safe start.
4. Add two greys. One mid-grey for secondary text, one light grey for gridlines and de-emphasised shapes.
5. Add one support colour. Something that sits well with the accent but is clearly quieter.
6. Set it up in your slide master or theme colours so every new slide uses the same palette.
7. Test contrast. More on that below.

Test contrast before you commit

Colours that look fine on your monitor can wash out on a projector or a phone in sunlight. Use a contrast checker (there are many online) to test your text and background combinations.

The WCAG guidelines are a good reference. They ask for a contrast ratio of at least 4.5:1 for normal text and 3:1 for large text and important graphics. Slide headlines often count as large text, but body text, labels and captions should meet 4.5:1.

Also check:

• Accent on background. Can you read text set in your accent colour?
• Text on accent. If you use accent-coloured boxes, is the text inside readable?
• Chart colours side by side. Can someone tell two series apart without relying on colour alone? Add direct labels.

Colour in video

When slides become a video, colour faces a couple of extra tests.

• Compression. Video compression can make subtle gradients band and fine colour differences blur. Solid, distinct colours hold up better.
• Small screens. On a phone, two similar shades may look identical. Make differences obvious.
• Added effects. Animation, transitions and captions put extra elements over your slides. Preview your palette in the finished video, not just in the deck.

A before and after

Before: A sales chart with six bars, each a different brand colour. The headline is “Regional results” in light blue on white.

After:

• Headline in near-black: “The north grew fastest this quarter”
• Five bars in light grey
• The north bar in the accent colour
• Each bar labelled directly with its region and value

The palette shrank from seven colours to three, and the slide now says exactly one thing. There’s more on writing that kind of headline in slide headlines that make a point.

Quick checklist

• Five to seven colours, each with a defined role
• One accent colour, used only for emphasis
• Greys used for anything that should step back
• Text contrast checked against WCAG (4.5:1 for normal text)
• Colour never used as the only way to carry meaning
• Palette set in the slide master or theme
• Previewed on a phone and in the finished video

Making your palette work in a slide video

A tight palette is one of the things that makes a slide video look deliberate rather than thrown together. It also helps the viewer follow the narration, because the accent shows them where to look at each moment.

Once your colours are set, drop the deck into the PowerPoint to video converter and see how your colours hold up in motion. a.i. is the director behind each video, rebuilding charts as animated charts with the same numbers and bringing your accent in on the word that names it, so the colour roles you chose do real work on screen.