Within one red — does the model tell them apart?
Does it actually draw scarlet differently from oxblood?
Setting red beside blue proves nothing. The real question is whether shades inside one family separate at all.
A colour needs something to land on, so each cut attaches it to the dress. A bare scarlet at the end of a prompt lets the model decide what turns red.
The cuts below share a seed and a sampler, but the prompt differs from cut to cut. Open any cut to see the full prompt it received.
What each cut shows
scarlet- The brightest and most saturated, leaning slightly orange.
crimson- Only a shade deeper than scarlet, with the same hue; no blue cast.
burgundy- Wine — the value drops noticeably.
oxblood- Despite the name, not the darkest red of the four; burgundy is.
How these were made
Shared prompt
Differs per cut — each cut page has it in full.
Negative prompt
nsfw, nude, topless, bikini, swimsuit, lingerie, underwear, cleavage, suggestive, school uniform, pleated skirt, child, loli, teenage, bad quality, worst quality, worst detail, censor, jpeg artifacts, watermark, signature, text, extra limbs, bad hands, bad anatomy
Model
rinFlanimeIllustrious_v30 · euler_ancestral/normal · steps 28 · CFG 5 · 896×1152 · seed 777023
Takeaway
Only partly. scarlet and crimson come out nearly identical; the clear shift is burgundy, darker and leaning toward purple. Despite its name, oxblood is not the darkest and lands between the scarlet side and burgundy.
How far this result reaches
A lighting tag will bury these differences. Keep the light neutral when the colour is what you are judging.
Measured on a single Stable Diffusion family checkpoint. The same tags can behave differently on NovelAI, Midjourney or another checkpoint. This is a reference point, not a verdict.