1f77b4

1f77b4 is a hexadecimal color code used in digital color representations. The code is interpreted as sRGB with red=31, green=119, blue=180. This makes it a medium blue color. It is most recognizable as the first color in Matplotlib's default color cycle and is part of the Tableau color palette widely used in data visualization. Because it is a hex value, it is also commonly used in web design and graphic design; for CSS, the color would be specified as #1f77b4. There is no formal name for this color in standard color naming systems; it is usually referred to by its hex code or as the first Tableau/Matplotlib color. In plotting libraries, using 1f77b4 helps maintain consistent color identity across figures. The color appears slightly muted compared with pure primary blues due to its red component being relatively low and its blue component being relatively high, resulting in a vibrant yet balanced hue. Device rendering, color management, and gamma correction can subtly affect its perceived shade on different displays.