# Selective Desaturate — yeezhan.com
> One-time pay-per-task emergency tool to make your file ready for submission.
> No credits, no balance. One payment unlocks one task result, valid for 24 hours.

Tool domain: https://color-focus.yeezhan.com
Skill definition: https://color-focus.yeezhan.com/skill/SKILL.md
API documentation: https://color-focus.yeezhan.com/api/docs

## What this tool does
Keep one colour alive and drain the rest — the "Sin City" look, computed locally.

## Typical user problems
- Designers pay for this look in Photoshop: one accent colour against a grey world. Pick the hue, set the tolerance, done.

## Parameters
- mode: enum, required. 模式
- hue: number (range 0-360), optional. 保留色相 (0-360)
- tolerance: number (range 5-180), optional. 容差 (±度)

## Pricing
- Watermarked preview: free, no login required
- Final clean output: $2.99 one-time per task
- Require login (email/phone OTP) to complete payment
- Result available for download 24 hours after payment

## Limitations
- Max input 50 MB