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：室内色彩设计是一个将家具及室内空间元素进行色彩分配的创造性过程。尽管现有研究多聚焦于生成逼真的室内设计方案，但这些自动化方法常与用户意图相悖且忽视设计原理。通过需求发现的前期研究，我们开发了C2Ideas系统——一种面向设计师的创新型色彩方案创意构思工具，该系统基于意图对齐且领域导向的大语言模型。C2Ideas整合了三阶段流程：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一致且风格协调的色彩方案；室内着色阶段依据设计原则为室内元素分配色彩。我们还开发了支持灵活用户调整与可解释推理的交互式界面。通过系列室内案例与用户研究，C2Ideas验证了其有效性及设计师对其交互功能的高度认可。