Monochrome Image Generator

Quickly generate solid-color images in specified colors and sizes, with support for over 140 preset colors, custom colors, and batch generation.

Bug report

Browser execution mode: Your data is processed in your browser and is not uploaded to the server.

Speed and Stability: Processing speed depends on your device and browser. For large batch work, the desktop version may be more stable.

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If the online tool fails to load or run, try the desktop tool.https://tools.yikeaigc.com/

Tool Usage

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Set color, size, and format, then generate the image Supports single solid-color images, batch swatches, opacity, common sizes, PNG/JPEG/WebP output, and ZIP download.

Local Canvas generation

Generation mode Choose single or batch

Color settings Enter HEX, RGB, RGBA, HSL, or a CSS color name

Preset colors

Color code

Color picker

Opacity

100%

Batch config Each line: color,width,height,filename; commas in RGB/RGBA are recognized

Config list

Pipe-separated format is also supported: #0f6f8f|1200|630|brand-cover. Filename is optional; the system will name it automatically.

Size & output Width/height range: 1-4000 px

Width

Height

Lock ratio

Output format

JPEG/WebP quality

92%

Single filename

JPEG transparent background

Live preview Preview refreshes automatically after changes

Color #0f6f8f

Size 1200×630

Format PNG

Estimated tasks 1 image

Please finish setup first, then click Generate.

Generated results No results yet

Instructions

Software Usage Instructions

Select a generation mode: Choose “Single Generation” to quickly create one solid-color image; choose “Batch Generation” to generate multiple images with different colors or sizes at once using multi-line configuration.
Set the color: Use the preset palette, color picker, or manually enter a color code. HEX, RGB, RGBA, HSL, and common CSS color names are supported. If you need transparency, adjust the opacity slider.
Set the image size: Enter the width and height, or click common size buttons to quickly apply sizes for avatars, square images, landscape images, covers, HD videos, and more. Check “Lock Aspect Ratio” if you need to keep the proportions.
Select the output format:
- PNG: Supports transparency, suitable for design assets and transparent color blocks.
- JPEG: Suitable for web display; if the color has transparency, you can set the JPEG transparent background color.
- WebP: Suitable for scenarios that require both clarity and smaller file size.
Batch generation configuration: Enter “color,width,height,file name” on each line, for example: #0f6f8f,1200,630,brand-cover. You can also use vertical bars as separators, for example: #0f6f8f|1200|630|brand-cover.
Save settings: Click “Save Settings” to save the current color, size, format, and batch configuration; next time, click “Load Settings” to restore them.
Generate and download: Click “Next: Generate Image” to start processing. A single result can be downloaded directly; for multiple results, click “Download ZIP” to download them as a package.

FAQ

A: It is suitable for creating website placeholder images, UI prototype color blocks, brand standard color display images, social media backgrounds, video cover base images, solid-color poster backgrounds, and test image assets.

A: HEX format (such as #0f6f8f), RGB format (such as rgb(15,111,143)), RGBA format (such as rgba(15,111,143,0.5)), HSL format, and common CSS color names are supported. You can also choose a color directly with the color picker.

A: Enter one configuration per line in the format “color,width,height,filename”. For example: #ff0000,400,400,red-square. The filename can be left blank, and the system will name it automatically; if duplicate filenames are found, numbers will be added automatically to distinguish them.

A: PNG is suitable for images that require transparency or design handoff; JPEG is suitable for general web display and solid-color background images; WebP is suitable for web assets where you want to control file size. If the color includes transparency, PNG or WebP is recommended.

A: Width and height support 1 to 4000 pixels. Larger sizes use more memory, so batch processing is recommended when generating large images in bulk.

A: No. Image generation, previewing, packaging, and downloading are all completed on the current device. Color configurations and generated results will not be uploaded to the server.