Update for prompt_parser Updated 12/10/2024: Prompt Architect for Stable Diffusion A1111 | Civitai
An example only - but colors can be changed.

woman::adult, age::24;, caucasian_skin, hair_color::blonde;, smile, blush;, wearing::blue_dress::deep_v_neck,_;, portrait, (standing:1.4), hands::relaxed;,
blurred_dark_background, lighting::synthetic, warm;,
Negative prompt: watermark:0-100%, {child, teen}:0-100%, wearing::nail_polish on_fingernails;, wearing:jewelry, jewels;, skintone::asian;, lighting::natural;,
Steps: 65, Sampler: DPM++ 2M, Schedule type: Karras Exponential, CFG scale: 7, Seed: 60762764655, Size: 640x960, Model hash: 7be8cfbcd2, Model: FusionX-Realistic_v3_float16, Denoising strength: 0.4, Clip skip: 2, Hypertile U-Net: True, Hires upscale: 2, Hires steps: 30, Hires upscaler: 8x_NMKD-Superscale_150000_G, Version: v1.10.1, Hashes: {"model": "7be8cfbcd2"}
Introduction
When to add colors?
If you want to create a specific image with specific colors.
Note:
If you notice that other parts of the image are changing based on your color change, you may need to add additional color prompts to other parts of the image.
Example, let's say you want a pink background. Well, sometimes, you also get pink eyes, pink dress, pink hair, etc. That may not be desirable. While you can try to negative prompt out the pinkness, you may want to add specific colors instead.
In the following images, I have given examples on how to do that.
If you want to repeat this result, download the model, and use the same sampling methods used. I create images using my new scheduler, Karras Exponential which combines the best of both methods - quick inference and smooth blending between the two methods. Karras is a time-based method, wheras exponential is not. More can be read about it here on github.
For the below pictures, I did NOT use the same seed, so individual prompt changes shows a different picture, on purpose. General image settings: I used -1 with an additional -1 seed with a 0.1 strength, and I ran it with clip skip 2. Leftover clip skip from previous run - just left it on. You will get different results if you don't match the exact settings used in this guide. If you are developing a prompt with clip skip 0, you may need to adjust some things.
I use my models generally using CFG 7, clip skip 0, -1 with no additional seeds, but we're in a creative mood today, so here it is.
Step 1: Specify colors.

Picture 1: Orange dress, brown eyes
Effect: also brown hair. If that is not your desired hair color, change it by adding an additional positive prompt to specifically change the hair color.
portrait, (standing:1.4), adult, caucasian_skin, smile, blush, (\blurred, dark)\-background, (\orange)\dress, (\brown)\-eyes,,
Negative prompt: watermark, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes,
Steps: 45, Sampler: DPM++ 2M, Schedule type: Karras Exponential, CFG scale: 7, Seed: 90783888492, Size: 400x850, Model hash: 31ca5c2b37, Model: ACR_fusion_v2_float16, Variation seed: 147227691185, Variation seed strength: 0.1, Denoising strength: 0.55, Clip skip: 2, Hypertile U-Net: True, Hires upscale: 2, Hires steps: 45, Hires upscaler: R-ESRGAN 4x+ Anime6B, Version: v1.10.1, Hashes: {"model": "31ca5c2b37"}

Picture 2: Orange dress, brown eyes, blonde hair
Effect: Notice the eyes are slightly brown, slightly orange. Dress now has blonde colored / yellow dots. Maybe you want to change something else. Maybe you want to change the eyes to blue (see picture 3)
portrait, (standing:1.4), adult, caucasian_skin, smile, blush, (\blurred, dark)\-background, (\orange)\dress, (\brown)\eyes, (\blonde)\hair,,
Negative prompt: watermark, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes,
Steps: 45, Sampler: DPM++ 2M, Schedule type: Karras Exponential, CFG scale: 7, Seed: 116982864406, Size: 400x850, Model hash: 31ca5c2b37, Model: ACR_fusion_v2_float16, Variation seed: 58644688457, Variation seed strength: 0.1, Denoising strength: 0.55, Clip skip: 2, Hypertile U-Net: True, Hires upscale: 2, Hires steps: 45, Hires upscaler: R-ESRGAN 4x+ Anime6B, Version: v1.10.1, Hashes: {"model": "31ca5c2b37"}

Picture 3: Orange Dress, blonde hair, blue eyes
Effect: Desired results.
portrait, (standing:1.4), adult, caucasian_skin, smile, blush, (\blurred, dark)\-background, (\orange)\dress, (\blue)\eyes, (\blonde)\hair,,
Negative prompt: watermark, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms,
Steps: 45, Sampler: DPM++ 2M, Schedule type: Karras Exponential, CFG scale: 7, Seed: 131514470304, Size: 400x850, Model hash: 31ca5c2b37, Model: ACR_fusion_v2_float16, Variation seed: 51847903645, Variation seed strength: 0.1, Denoising strength: 0.55, Clip skip: 2, Hypertile U-Net: True, Hires upscale: 2, Hires steps: 45, Hires upscaler: R-ESRGAN 4x+ Anime6B, Version: v1.10.1, Hashes: {"model": "31ca5c2b37"}
Step 2: Specify clothing material
After you have your desired colors, setup, feel free to experiment with different background colors, different clothing colors, different hair and eye colors. Can add it other modifiers like type of clothing or style of clothing. I usually negative prompt "conservative" to get more flirty clothing styles. You could also try prompting out "midriff" to remove shots with exposed tummies.

Picture 1: Leather dress
portrait, (standing:1.4), adult, caucasian_skin, blush, (\blurred, pink)\-background, (\leather, black\dress, (\pink)\lipstick, (\blonde)\hair, long hair, front-facing,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin, strapless, (\pink)\hair, turtleneck,

Picture 2: Cotton Dress
portrait, (standing:1.4), adult, caucasian_skin, blush, (\blurred, dark)\-background, (\cotton, blue)\dress, (\blonde)\hair, long hair,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin,

Picture 3: Silk Dress
portrait, (standing:1.4), adult, caucasian_skin, blush, (\blurred, dark)\-background, (\silk, green)\dress, (\red)\lipstick, (\blonde)\hair, long hair,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin,

Picture 4: Latex Dress
portrait, (standing:1.4), adult, caucasian_skin, blush, (\blurred, dark)\-background, (\latex, purple)\dress, (\pink)\lipstick, (\blonde)\hair, long hair,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin,

Picture 5: Nylon and stripes with yellow and white
portrait, (standing:1.4), adult, caucasian_skin, blush, (\blurred, dark)\-background, (\nylon, red, striped yellow)\dress, (\pink)\lipstick, (\blonde)\hair, long hair,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin,

Picture 6: Nylon, white and yellow dress
portrait, (standing:1.4), adult, caucasian_skin, blush, (\blurred, dark)\-background, (\nylon, white, yellow)\dress, (\pink)\lipstick, (\blonde)\hair, long hair,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin, collar,
Summary for Step 2
You can change objects on the screen by specifying what to draw. If you're noticing color bleeding you can specify negative prompts to addresss that color.
Example positive prompts: pink background, blonde-hair
Effect: Blonde hair with some parts pink hair.
Solution: add (\pink)\hair or pink hair to the negative prompt.
Step 3: Change the background
If you've developed a background already, add that before all of the above, and remove the specifics for the background, unless you want to keep the style, example (\blurred)\background. You could also try bokeh, if you like that, or any number of different styles.
For the cover art, I chose a simple prompt swap from blurred, dark to blurred, sunset.
Noticed that the lipstick was coming in rather bold and dark, so added a negative prompt to rid it, and here are the results
Original Cover art:

portrait, (kneeling:1.4), adult, caucasian_skin, blush, (\blurred, sunset)\-background, (\vneck, black)\sweater, (\glossy pink)\lipstick, (\blonde)\hair, long hair, front-facing,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin, strapless, (\pink)\hair, turtleneck,
Steps: 45, Sampler: DPM++ 2M, Schedule type: Karras Exponential, CFG scale: 7, Seed: 90846166378, Size: 850x400, Model hash: 31ca5c2b37, Model: ACR_fusion_v2_float16, Variation seed: 115897321999, Variation seed strength: 0.1, Denoising strength: 0.55, Hypertile U-Net: True, Hires upscale: 2, Hires steps: 45, Hires upscaler: R-ESRGAN 4x+ Anime6B, Version: v1.10.1, Hashes: {"model": "31ca5c2b37"}
New Cover Art:

portrait, (kneeling:1.4), adult, caucasian_skin, blush, (\blurred, sunset)\-background, (\vneck, black)\sweater, (\glossy pink)\lipstick, (\blonde)\hair, (\green)\eyes, long hair, front-facing,
Negative prompt: watermark, child, teen, digital model, 3DCG, hand, pencils, animals, park,, child, teen, painted-nails, conservative, different colored eyes, crossed-arms, hair in front, asian-skin, strapless, (\pink)\hair, turtleneck, (\dark\)lipstick,
Steps: 45, Sampler: DPM++ 2M, Schedule type: Karras Exponential, CFG scale: 7, Seed: 135054915203, Size: 850x400, Model hash: 31ca5c2b37, Model: ACR_fusion_v2_float16, Variation seed: 81993456260, Variation seed strength: 0.1, Denoising strength: 0.55, Hypertile U-Net: True, Hires upscale: 2, Hires steps: 45, Hires upscaler: R-ESRGAN 4x+ Anime6B, Version: v1.10.1, Hashes: {"model": "31ca5c2b37"}

