Projector slides washed out: why it happens and how to test

Your slide looked crisp on the laptop and faded on the projector because a projector can’t make black. It can only add light to a screen, so the darkest thing it can show is the screen itself under the room lights. Every bit of daylight or stage light that lands on that screen fills in the dark parts of your design, and the picture flattens out.

The good news is that once you know what fades first, you can design around it and catch problems on Wednesday instead of during the first song.

Why the laptop lies to you

A laptop screen makes its own light, you’re sitting a foot and a half from it, and it’s usually turned up bright in a normal room. Its blacks are close to real black. Under those conditions almost any colour combination looks fine, including ones that won’t hold up anywhere else.

A projected image works the other way. The projector throws light at a white or grey surface, and the room is throwing light at that same surface. Where your slide is meant to be dark, the screen just shows whatever the room light gives it. Turn the house lights up for the announcements and your deep navy background becomes a dusty blue-grey. Open the blinds for the 11:00 service and it can go paler still.

Distance makes it worse. Someone in the back row sees the screen much smaller than you saw your laptop, so thin lines and small details blur together before any colour problems even start.

What fades first

Some design choices survive a projector and some don’t. The ones that don’t tend to fail in the same few ways.

Mid-tone backgrounds

A background that’s neither light nor dark (a medium blue, a muted teal, a warm grey photo) is the most common problem. On the laptop, white text on it looks fine. On the projector, room light lifts the background toward the brightness of the text, and the gap between them shrinks. The words don’t disappear, they just get tiring to read, which on a lyric slide with four lines on it is enough to lose people.

Pick backgrounds that are clearly dark or clearly light, and put the words on the opposite. If you love a photo that’s mostly mid-tones, darken it or put a dark band behind the text.

Dark text on a dark background

This sounds obvious, but it happens all the time with “tone on tone” designs: dark red text on a deep maroon, charcoal on black, navy on a dark photo. On a bright laptop they look elegant. Projected, they’re two slightly different shades of grey. If you can’t immediately read it on the laptop at arm’s length, nobody will read it on the screen.

Thin type

Light and hairline font weights look refined up close. On a projector, the strokes are only a few pixels wide, the projector’s focus is rarely perfect, and light spills into the dark areas around each letter. Thin letters get eaten from both sides. Use a regular or bold weight for anything people need to read, and save the thin, decorative fonts for a single large word on a title slide, if at all. There’s more on this in fonts that read from the back row.

Colour that shifts

Projectors don’t show colour the way your laptop does. Many are set to a bright “presentation” mode that pushes brightness at the cost of colour, which can turn skin tones and warm colours slightly green. An older lamp gets dimmer and often yellower with age. Deep reds tend to go brown or orange, and dark blues and purples often turn muddy.

You can’t fully control this, so don’t build a slide where the meaning depends on an exact colour. If your series graphic only works in one particular shade of burgundy, it will look wrong in the room on most Sundays.

Contrast is what you’re really protecting

Underneath all of this is one idea: the difference in brightness between the words and what’s behind them. Colour helps, but brightness does the work. A yellow word on a white background is two very different colours with almost no brightness difference, and it’s unreadable on a projector.

A quick way to check is to look at your slide in black and white. Most image viewers and presentation software can show a greyscale version, or you can take a screenshot and desaturate it. If the words still stand out clearly as light on dark or dark on light, you’re in good shape. If they turn into grey on grey, the projector will do the same thing to them.

Leave yourself more contrast than seems necessary. Whatever you see on the laptop is the best case, and the room will take some of it away.

Light text on a dark background is usually the safer choice for a sanctuary. A mostly dark slide keeps glare down, doesn’t light up the front of the room like a window, and is easier on the eyes during a long set. Dark text on a light background can work in a bright room where nothing else will, but test it there before you commit. For more on picking backgrounds that leave room for the words, see choosing a worship background that doesn’t fight the lyrics.

How to test before Sunday

You don’t need a light meter. You need the real room, the real lighting and ten minutes. The Wednesday night run-through or the half hour before rehearsal on Sunday morning both work.

1. Set the lights the way they’ll be during the service, including the windows. If the 9:00 service has morning sun on the screen and the 11:00 doesn’t, test at the brighter one.
2. Put up your hardest slides: the busiest lyric slide, a scripture slide with a long reference, any slide with a photo background.
3. Walk to the back row and the far side seats. Read every line out loud. If you hesitate on a word, so will the congregation.
4. Turn the house lights up as they would be for announcements or the sermon, and look again.
5. Check the same slides on any side TVs or confidence monitors, since they’ll show different colours from the projector.

Don’t rely on a photo from your phone. Phone cameras adjust brightness and contrast automatically and will make a washed-out screen look better than it does to the eye.

If something fails, fix the slide rather than asking for the lights to be turned down. You can’t always control the room, and the people who most need readable slides (anyone with older eyes, anyone sitting far back) are the ones who lose out when the lights win.

What to change if it’s already washed out

If you’re stuck with a slide that fades and no time to redo it, a few changes go a long way. Make the text bold. Add a dark, partly see-through band behind the words. Darken the background image. Cut the slide from four lines to two so you can make the words bigger. Any one of these is quicker than a new design, and together they rescue most slides.

When you’re making new backgrounds, plan for the room from the start. If you use Congregate’s Design questions, one of them is the colours, so that’s the moment to pick a pair with a clear dark and a clear light rather than two mid-tones. Whatever you use, keep the slide that fails in the room as your test slide for next time. Put it up first whenever the projector gets a new lamp, the blinds change or a new volunteer takes over, and you’ll know straight away whether the room has moved on you.