Fonts and Colours That Work on LinkedIn Carousels

Type and colour decide whether a carousel gets read or gets scrolled past, and most people choose both on a large screen, in a design tool, in a bright room. The reader is somewhere else: a phone, one hand, in a feed that shrinks the slide down to a card.

This page covers the concrete choices — which typeface, how many, what weight, what size relative to the slide, and what happens to your colours once LinkedIn puts them inside its own interface, including the dark-mode problem that catches people out.

Why does a font that looks fine on my laptop fail in the feed?

Three things happen between your canvas and the reader’s thumb.

It shrinks. You work at full size; the feed shows your slide inside a post card that is a fraction of that. Anything you had to lean in to read has already gone.

It gets re-rendered. Uploaded images are re-encoded and PDF pages become page previews. Fine detail softens: hairline strokes, delicate serifs and tight letter spacing lose definition in a way blunt letterforms do not.

It gets almost no attention. A headline has to land in the time it takes someone to decide whether to stop, which is not long enough to decode a stylish font.

So the brief is not “what looks good”. It is “what survives being small, softened and glanced at”. That constraint explains almost every rule below.

What font should I use for a LinkedIn carousel?

Look for three properties rather than a specific name.

• Simple letterforms. Plain sans-serif faces — the ones without the little strokes on the ends of letters — read fastest at small sizes, like the type on road signs.
• A tall x-height. The x-height is the height of a lowercase “x” next to the capitals. A face with a tall one looks bigger at the same point size — free legibility.
• Real weights, not faked ones. A family shipping regular, medium, semibold and bold as separate cuts beats one where your design tool fakes bold by thickening the outline.

A serif face can work for headlines if it is sturdy — a slab serif with thick, even strokes rather than fine hairlines. What consistently fails: thin and light weights, heavily condensed faces, handwriting and script fonts, and anything decorative used for body text. If you would describe a typeface as “elegant”, treat that as a warning at feed size.

One point people forget: check the licence. Plenty of free fonts are free for personal use only, and open-licensed libraries state the terms plainly.

How many typefaces should one carousel use?

Two is the ceiling. One is often better.

The reason is not taste, it is signalling. Every visual difference on a slide is read as meaning something. If the headline and the body use different typefaces, the reader learns “different font means a different kind of information”. Add a third and the rule breaks: the change stops telling them anything, and the deck feels assembled rather than designed.

The strongest option for most people is one family, several weights: bold for headlines, regular for body. That gives a clear hierarchy without adding a second set of shapes. If you do want two, make them obviously different — a sturdy serif headline over a plain sans body. Two sans-serifs that look almost the same is the worst of both worlds: the reader senses something is off but cannot see what.

Give each role a fixed treatment and reuse it on every slide:

What size and weight should the text be?

Exact pixel sizes depend on your export canvas, and LinkedIn’s recommended dimensions are worth checking on LinkedIn’s own help pages rather than trusting a number from a blog. What holds regardless of canvas is the ratio.

• The headline should be several times the size of the smallest text on the slide. If your headline and your body look like relatives, the hierarchy is too weak for a small screen.
• The smallest text should still be readable when you shrink the whole slide to about the width of a credit card on your monitor. That is roughly what the feed does to it. A crude test, and the most useful one available.
• Fewer words, bigger type. The reliable way to make type bigger is to cut the sentence, not to shrink the margins.

On weight, default to the heavy side: semibold or bold for headlines, regular or medium for body, and effectively never light or thin. Re-encoding thins strokes slightly, so a light weight arrives lighter than you drew it — and a light stroke has no presence against a busy feed, reading as background even when it is technically legible.

Worth fixing once and reusing: keep lines to roughly 30–45 characters, give body text a little air between the lines, and left-align it. Centred text is fine for a short headline and painful for a paragraph.

Why do my carousel slides look wrong in dark mode?

LinkedIn has a dark theme that plenty of members turn on. When they do, the app repaints its own interface — the background, the caption under your post, the buttons. It does not repaint your slides, because your slides are pictures. A white slide stays white. Three consequences follow.

A pure-white slide glows. Surrounded by a dark interface, a bright white rectangle is harsh. A slightly off-white background takes the edge off without changing anything else.

Transparency is the real breakage. If you export a PNG or a PDF with no background — just your text and shapes floating on nothing — you have handed the decision of what sits behind your words to whatever renders the file. Dark text on “nothing” can end up dark text on near-black. The fix is simple and absolute: draw a solid background rectangle across the whole artboard or page before you export, on every slide, and flatten it. Never rely on a transparent background.

Anything that depends on the page being white disappears. A white logo, a white card with no border, a pale drop shadow tuned for a light background — all look wrong once the surrounding interface is dark, even though the slide itself has not changed.

What colours actually work on a carousel?

Contrast first, taste second. The W3C’s Web Content Accessibility Guidelines set 4.5:1 as the minimum contrast ratio between normal-size text and its background, and 3:1 for large text. Free contrast checkers will tell you where a pair lands. Nothing on LinkedIn enforces that for an image, but it is a sensible floor to design against.

The pairings that fail most often, in rough order of how often you will meet them:

• Mid-grey text on white. It looks refined on a monitor and turns to mush on a phone in daylight. Darken it.
• A brand colour used as body text. Brand colours are usually chosen to look good as a block, not to be read as sentences. Use the brand colour as the accent, and near-black or near-white for the words.
• Text straight over a photo. Photos are busy and uneven, so contrast is fine in one corner and gone in another. Put a solid band or a strong overlay behind the text.
• Light colours on white — yellow, pale green, pale blue. Fine as a shape, unreadable as type.

When contrast falls short, darken or lighten the text rather than the background — one change, and it never disturbs the layout.

How do I use colour to show structure instead of decorating?

A useful test: point at each colour on the slide and say what it means. If you cannot answer, it is decoration, and it is costing you clarity. A carousel palette only needs four jobs filled.

• Background. One colour, the same on every slide, unless you are deliberately marking a change.
• Text. Near-black on a light background, near-white on a dark one, plus one muted version of it for secondary lines.
• One accent. Used for one meaning and one meaning only — the key phrase, or the step number, or the highlight. The moment the accent means two different things it has stopped being a signal.
• A section shift, if you need one. Flipping the background for the turning-point slide, and again for the final slide, tells the reader where they are without a single extra word.

Two more things this buys you. Consistency becomes recognition: if every deck uses the same background and accent, people know your slides before they read your name. And a visibly different last slide tells the reader the deck has ended — the moment you want them looking at whatever you are asking them to do next.

One caution: never let colour be the only thing carrying meaning. If red means “avoid this” and green means “do this”, label them too, because some readers will not see the difference.

A short checklist before you export

• One or two typefaces, no more, and the same roles on every slide.
• Nothing lighter than regular weight anywhere in the deck.
• Headline clearly several times the size of the smallest text.
• Every page has a solid background — no transparency.
• Slides checked against both a white and a black surround.
• Text over photos sits on a solid band or a strong overlay.
• Every colour on the slide can be given a one-word job.

How do I publish the finished deck?

Export it as a PDF and post it as a document post, and LinkedIn renders it as swipeable pages. Or export the slides as images and post 2 to 9 of them as a multi-image post. To do that from a chat window rather than the LinkedIn composer, Kalovio publishes either format through LinkedIn’s official API after showing you a preview to approve.

None of this rescues a weak idea. But type and colour are the part of a carousel you can get right once and reuse for every deck. Pick a family, a weight scale, a background and one accent, check it on black as well as white, and stop redesigning it.