Interior color design is a creative process that endeavors to allocate colors to furniture and other elements within an interior space. While much research focuses on generating realistic interior designs, these automated approaches often misalign with user intention and disregard design rationales. Informed by a need-finding preliminary study, we develop C2Ideas, an innovative system for designers to creatively ideate color schemes enabled by an intent-aligned and domain-oriented large language model. C2Ideas integrates a three-stage process: Idea Prompting stage distills user intentions into color linguistic prompts; Word-Color Association stage transforms the prompts into semantically and stylistically coherent color schemes; and Interior Coloring stage assigns colors to interior elements complying with design principles. We also develop an interactive interface that enables flexible user refinement and interpretable reasoning. C2Ideas has undergone a series of indoor cases and user studies, demonstrating its effectiveness and high recognition of interactive functionality by designers.

翻译：室内色彩设计是一种将颜色分配给室内空间中家具及其他元素的创造性过程。尽管大量研究聚焦于生成逼真的室内设计，但这些自动化方法常与用户意图错位，且忽视了设计依据。基于一项需求发现的前期研究，我们开发了C2Ideas系统——一种通过意图对齐且面向领域的大语言模型帮助设计师创意思考配色方案的创新系统。C2Ideas集成了三阶段流程：创意提示阶段将用户意图提炼为色彩语言提示；词色关联阶段将提示转化为语义与风格协调的配色方案；室内着色阶段依据设计原则将颜色分配给室内元素。我们还开发了支持灵活用户调整与可解释推理的交互界面。通过一系列室内案例与用户研究，C2Ideas展示了其有效性，且其交互功能获得了设计师的高度认可。