This podcast episode explores the significance of color in web development, from color spaces and gamuts to HDR colors and gradients. It discusses color spaces, such as sRGB, OKLCH, and HDR, and highlights their advantages and challenges. It also delves into color manipulation techniques in CSS and JavaScript, including the color mix function, relative color syntax, and the benefits of perceptually uniform color spaces. The episode explores the evolution of color spaces and displays, introduces new tools like Gradient.style, discusses the hidden features and capabilities of gradients, and provides practical tips for applying HDR and gradients in web development.