提示词库 · Logo设计
十个实测的logo符号提示词——户外风单线标志、几何动物、复古徽章、负空间字母组合和渐变App图标。每张卡片都展示未经修改的输出以及生成它的模型。
要的是一个标志，不是一幅画。改变一切的那句话是「flat vector logo mark, centered on a plain white background」——它把模型从插画模式拽进设计模式：一个想法、平涂色块、干净轮廓、没有场景。几乎每次都奏效的结构是：「[style] logo mark of [one concrete object], [construction detail], flat vector, [two-color palette], plain white background, no text」。风格词在这里是实打实有分量的：monoline、geometric、emblem、negative space、gradient app icon 和 hand-drawn 产出的是真正不同的构造，而不只是不同的装饰。
把公司名留在提示词之外。小号字体仍是图像模型崩掉的地方，一个糊掉的字标会毁掉一个本来不错的符号——先生成标志，再自己在Figma或Illustrator里排字，反正真正的工作室也是这样组合的。下面每个标志都是它那条提示词在BananaBanana上未经修改的首次输出；Lite每张$0.03，你可以用一杯咖啡的钱试四十个方向，再决定选哪一个。
下面每张图片都是所在卡片提示词的未修输出——没有从几十次尝试里挑好的，也没有修图。模型徽标标明了它由什么生成、花了多少钱。
Flat vector logo mark of a mountain peak with a rising sun behind it, drawn in a single continuous line of even weight, contained in a circle. Minimal outdoor-brand aesthetic, deep violet line on plain white background, generous negative space, no text.
Flat vector logo mark of a fox head built from clean angular polygons, symmetrical and simplified to eight shapes. Modern geometric branding style, warm amber and deep plum fills only, plain white background, no gradients, no text.
Flat vector emblem logo mark: a circular badge with a coffee bean at its center framed by two laurel branches and a double outline ring. Vintage roastery style, solid dark espresso brown on plain cream background, crisp edges, no text, no lettering.
App icon logo mark on a rounded square tile: an abstract folded ribbon shape suggesting forward motion, rendered in a smooth violet-to-fuchsia gradient with a soft inner highlight. Modern software branding, plain white background around the tile, no text.
Flat vector logo mark where two overlapping leaves form the negative-space silhouette of a single letter B between them. Precise geometric construction, deep forest green and soft sage, plain white background, no other lettering, no text.
Flat vector logo mark of an abstract wave made of five parallel bars of increasing height, each bar rounded and slightly rotated to suggest flow. Minimal tech-startup style, gradient from indigo to cyan across the bars, plain white background, no text.
Hand-drawn logo mark of a croissant crossed with a single wheat stalk, sketched in an uneven single-weight ink line with a slightly wobbly artisanal feel. Small-bakery branding, warm brown ink on plain off-white background, no shading, no text.
Flat vector logo mark of an origami crane in flight, built from flat folded facets with two tones of the same color marking light and shadow planes. Clean geometric paper-craft style, coral and dusty rose, plain white background, no outline, no text.
Flat vector crest logo mark: a slim shield outline containing a simplified mountain range and three horizontal lines beneath it. Contemporary heritage-brand style, thin gold line on plain deep-navy background, perfectly symmetrical, no text.
Flat vector logo mark of a camera aperture made of six overlapping blades forming a hexagonal opening, each blade a slightly different tint. Precise studio-branding geometry, monochrome charcoal tints with one amber blade as accent, plain white background, no text.
仅这一句就能阻止模型去画一个场景，转而去设计一个物件：单一主体、平涂色块、干净轮廓、留有余白。
小号字体仍是图像模型最弱的一环。先生成符号，再在Figma里排公司名——反正工作室做lockup也是这样分开来的。
logo必须在浏览器标签页的16像素里活下来。描述一个物体和一条构造规则；两个概念叠在一起，缩小后就成了一团糊。
指定两种颜色，别多。放任自流的配色像剪贴画；「deep violet line on white」或「amber and plum fills only」读起来才像个品牌。
可以——你在BananaBanana上生成的图片归你所有，可以用作品牌标识。注册商标之前请照常做一次近似检索：无论是不是AI做的logo，原创性都由你自己负责。
不会——输出的是位图。因为这些提示词要求的是纯色背景上的平涂色块，标志用Illustrator的图像描摹或Vectorizer这类免费工具都能干净地矢量化，这也是拿到可投产logo前的正常最后一步。
logo尺度上的字体仍是图像模型会打滑的地方——一个微妙变形的字母比没有字母更糟。只生成符号、自己排名字，结果更干净，对整体组合也有完全的控制权。
$0.03的Lite非常适合批量试扁平简单的方向。Nano Banana 2很好地处理几何构造和徽章。当精度要紧时用$0.11的Pro——负空间字母组合、纤细的金色线条、严丝合缝的对称。
先按这些提示词指定的纯色背景生成，再用任意抠图工具去掉它。平涂色块和硬边让抠图很干净，不像带柔和阴影的插画那样麻烦。
