Color perception is a major guiding factor in the evolutionary process of human civilization, but most of the neurological background of the same are yet unknown. This work attempts to address this area with an EEG based neuro-cognitive study on response of brain to different color stimuli. With respect to a Grey baseline seven colors of the VIBGYOR were shown to 16 participants with normal color vision and corresponding EEG signals from different lobes (Frontal, Occipital & Parietal) were recorded. In an attempt to quantify the brain response while watching these colors, the corresponding EEG signals were analysed using two of the latest state of the art non-linear techniques (MFDFA and MFDXA) of dealing complex time series. MFDFA revealed that for all the participants the spectral width, and hence the complexity of the EEG signals, reaches a maximum while viewing color Blue, followed by colors Red and Green in all the brain lobes. MFDXA, on the other hand, suggests a lower degree of inter and intra lobe correlation while watching the VIBGYOR colors compared to baseline Grey, hinting towards a post processing of visual information. We hope that along with the novelty of methodologies, the unique outcomes of this study may leave a long term impact in the domain of color perception research.

色觉是人类文明进化过程中的主要指导因素，但其大部分神经学背景尚不清楚。这项工作试图通过基于脑电图的神经认知研究来解决这一领域，研究大脑对不同颜色刺激的反应。关于灰色基线，向 16 名色觉正常的参与者展示了 VIBGYOR 的七种颜色，并记录了来自不同叶（额叶、枕叶和顶叶）的相应脑电图信号。为了量化观看这些颜色时大脑的反应，使用处理复杂时间序列的两种最先进的非线性技术（MFDFA 和 MFDXA）分析相应的 EEG 信号。MFDFA 透露，对于所有参与者来说，频谱宽度以及 EEG 信号的复杂性，在查看蓝色时达到最大值，其次是所有脑叶中的红色和绿色。另一方面，与基线灰色相比，在观察 VIBGYOR 颜色时，MFDXA 建议较低程度的叶间和叶内相关性，暗示视觉信息的后处理。我们希望随着方法论的新颖性，这项研究的独特成果可能会对颜色感知研究领域产生长期影响。