Analysis of color and tonal mode in Photoshop

1. Draw RGB Color mode diagram Create a new file with black background and create a new 3 layer. After drawing a circular selection, fill the three-layer selection with red, green, and blue colors, then remove the selection and adjust the position of the three circles with the move tool in the image window. Click the live Layer panel, select the newly created three layers, and in the blend mode Drop-down list, select filter mode to replace the default normal mode (Note: Some versions "filter" into "screen"). Observe the image window, red and green color overlap part of yellow, green and blue color mixed into cyan, red and blue is the production of finished color (magenta), three primary colors mixed with the parts of white (Figure 1). 2. Draw CMYK mode diagram Create a new file with the background set to white. Still build 3 layers and draw a round selection, followed by green, product, yellow three colors, delete the selection, adjust the position of the circle. In the layers panel, change the "blending mode" of these three levels to "multiply". At this point, it will be found that the mixture of the color darkened: green products to generate blue, green yellow to produce green, Huang Pingseng into red, three-color mixing part into black. The color of the mixture is rather lost, so the CMYK mode is called "subtractive mode". Finally in the corresponding position in the graph with R, G, B, C, M, Y, K, and other words, merge layers, end the color mode of the demo. Color mode is the focus and difficulty of color theory, if not demonstrated, students will feel abstract. According to the above method, students can basically understand two different color blending modes.