How to Make AI Posters for Diwali, Sales and Events
Poster sizes for Instagram, Stories, WhatsApp and print, a prompt formula that leaves room for your text, 25 ready prompts and colour tips for Indian festivals and sales.
SARV LABS Editorial Team7 min read
In this article
For a local shop, a restaurant or an event organiser, posters do a lot of work: they announce the Diwali sale, fill the workshop, and keep the WhatsApp status busy. They also eat time, especially in festive season when every day needs a new one. An AI poster generator lets you make a polished background and layout in minutes, so your effort goes into the offer, not the design.
This guide covers the right sizes, a prompt formula that leaves room for your text, 25 prompts you can copy, and tips on readability and colour.
Why AI posters work for local businesses and creators
- Speed in peak season. Make a week of festive posters in one sitting.
- Variety without a designer. Try a traditional look, a modern minimal look and a bold sale look for the same offer.
- Every format at once. One idea can be square for the feed, tall for Stories and WhatsApp, and portrait for print.
- Local flavour. You can ask for rangoli, diyas, kites, marigolds or monsoon scenes, details that generic templates often miss.
Poster sizes that work
Choose the shape before you write the prompt; it changes the layout the AI makes.
| Where | Shape | Pixels (recommended) | Tip |
|---|---|---|---|
| Instagram or Facebook feed | 1:1 or 4:5 | 1080 x 1080 or 1080 x 1350 | 4:5 takes more screen space in the feed |
| Instagram or Facebook Story | 9:16 | 1080 x 1920 | Keep text in the middle 70% |
| WhatsApp status | 9:16 | 1080 x 1920 | Names and buttons cover the top and bottom |
| Website or YouTube banner | 16:9 | 1920 x 1080 | Put text on the left or right third |
| Print A4 | Portrait | 2480 x 3508 at 300 dpi | Check sharpness at full size |
In SARV LABS Studio you can choose 1:1, 4:5, 9:16, 16:9 or 3:2 for each image. Our AI poster generator page shows how.
The prompt formula for posters
A poster prompt is different from a photo prompt: you are designing a layout with a place for words.
Theme + main visual + background + empty space for text + colour palette + style + shape
Diwali sale poster, a glowing brass diya with marigold flowers in the lower half, deep maroon background with soft golden sparkles, large empty space in the upper half for headline text, gold and maroon palette, premium Indian festive design, 4:5
The key phrase is "empty space for text" with a position (top, left, upper half). It tells the model to keep that area calm so your words stay readable.
25 prompts for posters
Replace the brackets with your business details. Add your exact text afterwards.
Diwali and festivals
Rows of lit diyas on a dark maroon background with golden bokeh, ornate gold border, empty space in the centre for text, rich traditional festive design, 4:5
Single elegant diya on a deep navy background, thin gold line art rangoli around it, lots of empty space at the top, modern minimal festive design, 1:1
Colourful rangoli pattern made of flower petals seen from above, filling the lower third, soft cream background above for text, bright joyful festive design, 9:16
Bursts of pink, yellow and green Holi colour powder against a white background, colour clouds at the edges, clean centre for text, energetic festive poster, 4:5
Colourful kites flying in a clear blue sky over rooftops, the sky in the upper half empty for text, sunny cheerful festival poster, 9:16
Dancers in traditional chaniya choli silhouettes with dandiya sticks, vibrant orange and magenta background, empty band at the top for text, festive event poster, 4:5
Sales and offers
Gift boxes, shopping bags and gold confetti on a rich red background, the left half empty for a big sale headline, bold commercial poster design, 16:9
Diagonal lightning shapes and bold geometric blocks in yellow and black, high contrast, large empty area in the middle for discount text, urgent sale poster, 1:1
Folded colourful kurtas and sarees stacked neatly on a wooden table, soft daylight, empty top area for offer text, boutique sale poster, 4:5
Smartphone and headphones on a dark blue gradient background with glowing light streaks, empty right side for price text, tech sale poster, 16:9
Fresh vegetables, fruits and grocery packs arranged at the bottom of the frame, clean light green background above for offer text, friendly local store poster, 9:16
Concerts and nightlife
Silhouette of a singer with a microphone on stage, purple and blue spotlights, smoke, dark upper area for event name and date, concert poster, 4:5
Warm candlelit stage with harmonium and tabla, deep amber tones, elegant empty space at the top for text, soulful music event poster, 9:16
Neon lights, crowd hands raised, laser beams in pink and cyan, dark background, empty centre for party name, nightlife event poster, 1:1
Workshops and education
Clean desk with a notebook, laptop and coffee cup seen from above, soft light grey background, empty left half for workshop details, professional event poster, 16:9
Colourful paint splashes, crayons and paper cut-outs around the edges, white centre for class details, playful cheerful poster, 4:5
Calm sunrise over hills with a person in a yoga pose in silhouette, soft peach and lavender sky, empty upper area for text, peaceful wellness poster, 9:16
Real estate
Modern residential tower at golden hour with landscaped gardens, wide view, clear sky on the right for project details, premium real estate poster, 16:9
Bright modern living room with large windows and indoor plants, warm daylight, empty top band for open house details, inviting property poster, 4:5
Restaurants and food
Traditional Indian thali on a banana leaf with many small bowls, top-down view on a dark wooden table, empty space at the top for menu text, appetising restaurant poster, 4:5
Iced coffee and croissant on a marble café table, soft morning light, pastel background, empty right side for offer text, cosy café poster, 1:1
Hot pakoras and chai on a window ledge with rain outside, warm moody light, empty upper area for text, seasonal restaurant poster, 9:16
Business events
Abstract network of glowing connected dots and lines on a deep blue gradient, modern corporate style, empty left half for conference name and dates, 16:9
Spotlight on an empty podium with a soft glow, dark elegant background, space above for product name and launch date, premium launch poster, 4:5
Red ribbon and golden scissors in front of a shop entrance with marigold garlands, bright festive light, empty top area for grand opening text, celebratory poster, 4:5
Text placement and readability tips
Most AI posters fail at the last step: the words cannot be read. These rules fix it.
- Generate first, write later. Add the headline, offer, date, address and phone number in a design tool, so spelling and fonts are exactly right.
- One headline, one offer, one action. "Diwali Sale. Flat 30% off. Visit today." beats a list of seven offers.
- Use a calm area or a band. Put text over the empty space you asked for, or add a semi-transparent dark or light band behind it.
- Big and bold. The headline should be readable on a phone held at arm's length.
- Mind the edges. On Stories and WhatsApp, keep text away from the top and bottom 10%.
- Two fonts at most. One decorative font for the headline, one simple font for details.
- Contrast check. Light text on dark backgrounds or dark text on light. Squint: if the text disappears, it needs more contrast.
Colour psychology for Indian festivals and sales
| Colour | What it signals | Good for |
|---|---|---|
| Gold and saffron | Celebration, prosperity | Diwali, weddings, premium offers |
| Deep red and maroon | Auspiciousness, energy | Festive sales, weddings, Karva Chauth |
| Marigold yellow | Warmth, joy | Pujas, Sankranti, welcome posters |
| Royal purple | Luxury, creativity | Jewellery, fashion, premium events |
| Emerald green | Growth, freshness | Eid, organic food, wellness |
| Bright mixed colours | Fun, play | Holi, kids events, flash sales |
| Black and yellow | Urgency, attention | Flash sales, clearance |
Use one main colour, one supporting colour and one accent for the call to action. Too many colours make a poster look busy, which is the opposite of premium.
Make your festive poster set today
Pick five prompts from this list, generate each in 4:5 for the feed and 9:16 for Stories and WhatsApp, and add your offer text. That is ten posters for the week. Open SARV LABS Studio to start, see the AI image generator for more image ideas, and if you sell products, pair your posters with our 50 product photo prompts.
Frequently asked questions
Can AI write the text on my poster?
Some image models can add short words, but spelling and fonts are not always reliable, especially in Hindi. The dependable method is to generate the design with empty space and add your exact text, prices and dates in a design tool.
What size should a WhatsApp status poster be?
Use a tall 9:16 shape, such as 1080 by 1920 pixels. Keep important text away from the top and bottom edges, where the app shows names and buttons.
Can I print an AI poster?
Yes, if the image has enough resolution. For A4 at good quality you want roughly 2480 by 3508 pixels; upscale the image if needed and check it at full size before printing.
Which colours work best for a Diwali poster?
Warm gold, marigold yellow, deep red and maroon, with touches of royal purple or emerald. Keep a dark or rich background so the light of diyas and text stand out.
Can I use gods or famous people on AI posters?
Be careful. Religious imagery should be respectful, and you should not use a real person's face or a celebrity likeness without permission, or another brand's logo.
