How to create coloring pages with Gemini (Nano Banana) | Prompt examples
Hello, this is Makari.
Today was a holiday, wasn't it?🌷
How did you all spend your day?
I have three children at home, but unfortunately, it rained all morning today.
Since we couldn't go outside, we tried 'making coloring pages with AI' as an activity to enjoy at home.
This was more popular with the children than I expected, so in this article, I will introduce
how to use Gemini (Nano Banana) to create coloring pages that you can enjoy with your children😊
It's easy and free to make even from your smartphone, so why not try playing with it during your time at home?𓂃𓈒 𓂂𓏸
The latest model of Nano Banana is 'Nano Banana 2'
▼Click here for how to use Nano Banana 2
Coloring pages created with this prompt
Here are the coloring pages generated with this prompt𓂃𓈒 𓂂𓏸
How to create coloring pages just from images
With Nano Banana, you can easily create coloring pages just by describing the image you want to turn into a coloring page.
For small children, simple instructions are enough.
I will also introduce mandala coloring pages for adults ˖⊹𑁍
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For boys
▼Prompt example
Please create a coloring page illustration for a 5-year-old.
Depicting a dinosaur
[Mandatory requirements]
・Completely monochrome line art
・White background
・Lines in black only
・No colors used at all as it is for coloring
・Lines should be thick and clear
・Avoid fine details
・Make the areas to color large
・Gentle atmosphere for children
・Aspect ratio 2:3
・No text
▼For copying
5歳向けの塗り絵用イラストを作成してください。恐竜が描かれている【必須条件】・完全モノクロ線画・背景は白・線は黒のみ・塗り絵用なので色は一切使用しない・線は太めでくっきり・細かい描き込みは避ける・塗る面は大きめにする・子ども向けでやさしい雰囲気・アスペクト比 2:3 ・テキストなし↓
▼Image generation example
For girls
▼Prompt example
Please create a coloring page illustration for a 5-year-old.
Depicting a unicorn and a princess in a dress
[Mandatory requirements]
・Completely monochrome line art
・White background
・Lines in black only
・No colors used at all as it is for coloring
・Lines should be thick and clear
・Avoid fine details
・Make the areas to color large
・Gentle atmosphere for children
・Aspect ratio 2:3
・No text
▼For copying
5歳向けの塗り絵用イラストを作成してください。ユニコーンとドレスを着たお姫さまが描かれている【必須条件】・完全モノクロ線画・背景は白・線は黒のみ・塗り絵用なので色は一切使用しない・線は太めでくっきり・細かい描き込みは避ける・塗る面は大きめにする・子ども向けでやさしい雰囲気・アスペクト比 2:3・テキストなし↓
▼Image generation example
For adults
▼Prompt example
Create a detailed illustration for an adult coloring page.
A mandala coloring page featuring flowers.
[Requirements]
- Completely monochrome line art
- White background
- Lines in black only
- No colors used at all
- Very fine and detailed linework
- Composition focused on symmetry
- Thin and uniform lines
- No shadows or gradients allowed
- No three-dimensional shading effects
- Aspect ratio 2:3
- No text
▼ For copying
大人向けの細密な塗り絵用イラストを作成してください。花が描かれたマンダラ塗り絵。【必須条件】・完全モノクロ線画・背景は白ベース・線は黒のみ・色は一切使用しない・非常に細かく緻密な描き込み・左右対称を意識した構図・線は細めで均一・影やグラデーションは禁止・立体的な陰影表現は入れない・アスペクト比 2:3・テキストなし↓
▼ Image generation example
How to make coloring pages from your favorite illustrations
From here on, I will introduce how to create "coloring pages"
from your favorite illustrations.
This is the easiest method with the fewest failures.
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🔸Steps to create a coloring page
Gemini and attach the illustration you want to turn into a coloring page.
▼ The illustration attached this time is here
(Created with Midjourney)
2. Select Nano Banana (Fast Mode), and
simply copy and paste the prompt below to send.
*However, Nano Banana Pro (Thinking Mode) has higher accuracy.
▼ Prompt example
Please convert this image into a line art illustration for a coloring page.
Use only a white background and black lines; do not use any other colors.
Make it a simple, clear outline with no fills or gradients.
Please create it with an aspect ratio of 3:2.
*Please feel free to change the aspect ratio.
In the case of Nano Banana (Fast Mode), the original image's ratio is reflected as is. (It cannot be specified)
▼ For copying
この画像を塗り絵用の線画イラストに変換してください。背景は白、線は黒のみを使用し、その他の色は一切使わないでください。シンプルでくっきりとしたアウトラインにし、塗りつぶしやグラデーションはなし。アスペクト比は3:2で作成してください。↓
Rather than thinking up a prompt for coloring pages from scratch, it is
overwhelmingly easier to "convert an illustration you like into line art"
.
Download from the top right.
If you are on a smartphone, tap the image and select "Save".
You can easily create authentic coloring pages too!
Any illustration can be turned into a cute coloring page🍌
▼ Illustration created with Nano Banana Pro
▼ Illustration created with PixAI
▼ Click here for AI illustration prompt examples
How to create dress-up coloring pages
From here, I will introduce how to create dress-up coloring pages using a character sheet.
It will be a coloring page with girls in different outfits lined up on a single sheet.
Since 6 types are lined up on an A4 size, it is very satisfying to color.
At our house, my daughter was so absorbed in it that she colored 3 sheets in one day😊
This is a recommended coloring page for girls.
▼ The illustration that serves as the basis for this character sheet is here
(Created with Nano Banana Pro)
▼ Click here for the character sheet
▼ Click here for how to make a character sheet
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Prompt for creating coloring pages with different outfits
First, I will introduce a version of the same character with different outfits.
▼Prompt example
Please create a version of this character wearing 6 different outfits.
Keep the character's composition consistent, but change the outfits, accessories, poses, and expressions.
For coloring pages, monochrome line art, white background, lines in black only, no colors used, no text.
Aspect ratio 2:3, arranged in 3 rows and 3 columns.
▼For copying
このキャラクターに6種類の異なる衣装を着せたバージョンを作成してください。
キャラクターの構図は統一し、衣装・アクセサリー小物・ポーズ・表情を変更してください。
塗り絵用、モノクロ線画、背景は白ベース、線は黒のみ、色は一切使用しない、テキスト不要。
アスペクト比2:3、上3・下3で配置。↓
If you want to see other patterns, you can
click "Retry" to regenerate them.
Furthermore, if you specify details such as:
・Casual style
・Cute style
・Dresses
・Mature clothing
the results will be closer to your image.
Here is another version with a different character.
If you specify the clothing in detail, you can also create a mature clothing version💡
▼Clothing prompt example
Prompt for creating similar character coloring pages
Next, I will introduce how to create "similar characters" within the same world view.
Attach a character sheet and
enter the following prompt.
▼ Prompt example
Please create 6 different characters drawn in a world view similar to this character.
Keep the character composition consistent, but change the outfits, accessories, poses, and expressions.
For coloring pages, monochrome line art, white background, lines in black only, no colors used at all, no text.
Aspect ratio 2:3, arranged in 3 rows and 3 columns.
▼ For copying
このキャラクターに似た世界観で描かれた6種類の異なるキャラクターを作成してください。
キャラクターの構図は統一し、衣装・アクセサリー小物・ポーズ・表情を変更してください。
塗り絵用、モノクロ線画、背景は白ベース、線は黒のみ、色は一切使用しない、テキスト不要。
アスペクト比2:3、上3・下3で配置。↓
It's fun to be able to arrange things in various ways!
Summary
By using AI, coloring pages
become something you can enjoy creating.
・Convert your favorite illustrations into line art
・Create different outfits from a character sheet
・Create from scratch using only images
Any of these methods are very easy.
For rainy days at home,
for parent-child communication,
or for adult relaxation time.
Why not try making your own original coloring pages during your time at home?🌿
Thank you for reading until the end😊
