Know about the (Red, Blue, and Green) RYB colour model
     Before proceeding to the answer we must understand the RYB (Red, Blue, and Green) color model.
Red, Yellow, and Blue, or RYB for short, is a subtractive color mixing model that’s commonly applied in design and art. In response to this model, the colors red, yellow, and blue are the primary colors, meaning that no other color can be combined to create them. The primary colors can be combined in various ratios to create all other colors.
     When blending pigments or dyes, a technique known as subtractive color mixing is used, in which part of the light reflected from the surface beyond each layer of color is absorbed. Red paint, for instance, will absorb all of the green light and some of the blue light, while yellow paint will absorb all of the blue light and some of the green light. Here is an example of how paint mixing works. The remaining light will appear orange because it is a mixture of red and yellow.
     The RYB color model is a helpful resource for learning how to blend colors to make an infinite number of tints and shades. It’s also an excellent framework for learning how different colors combine to produce various effects.
The following are a few benefits of the RYB color model:
• The model is straightforward and easy to comprehend.
• A large range of colors can be produced using this adaptable model.
• It is an effective model for comprehending the interactions between colors.
The RYB color model does, however, have some limitations:
• It is not a perfect model to understand how the human eye perceives colors.
• It is not the most accurate color-representation model for digital displays.
     In spite of its drawbacks, the RYB color model continues to be a useful instrument for learning about color mixing. It is an excellent model for beginners to learn about color theory, as well as for artists and designers to use when creating their work.
What Color Do Brown and Blue Make in Paint?
      Depending on the specific shades and tints that are mixed together, shades and tints of brown and blue can produce a wide range of colors.
      Brown shades are created by mixing black into a pure brown color. This will darken and make the brown color less saturated. Shades of brown examples include:
• Deep brown
• Espresso brown
• Dark chocolate brown
• Dark mahogany brown
• Dark brown
      Brown tints are created by mixing white into a pure brown color. This will lighten and intensify the brown color. Here are some examples of brown tints:
• Beige
• Tan
• Ivory
• Sand
• Khaki
      Blue shades are created by mixing black into a pure blue color. The blue will become darker and less saturated as a result of this. Shades of blue include the following:
• Navy blue
• Midnight blue
• Royal blue
• Sapphire blue
• Dark blue
      A mixture of white to a pure blue color produces blue tints. This will lighten and intensify the blue color. Blue tints include the following:
• Sky blue
• Baby blue
• Turquoise
• Pastel blue
• White Blue
      When brown and blue shades and tints are combined together, the resulting color is determined by the specific shades and tints used. Mixing a light blue tint with a dark brown shade, for example, will result in a muddy green color. However, combining a light blue tint with a light brown tint produces a more vibrant green color.
Here's a table of some of the colours that can be made by combining brown and blue shades and tints:
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| Brown Shade | Blue Shade | Resulting Color |
| Dark brown | Navy blue | Dark green |
| Dark brown | Sky blue | Muddy green |
| Light brown | Navy blue | Dark teal |
| Light brown | Sky blue | Light teal |
| Tan | Navy blue | Teal |
| Tan | Sky blue | Mint green |
| Beige | Midnight blue | Gray-blue |
| Beige | Royal blue | Slate blue |
| Khaki | Sapphire blue | Gray-green |
| Khaki | Turquoise | Turquoise green |
| Sand | Dark blue | Dark gray |
| Sand | White blue | Light gray |
| Ivory | Dark blue | Charcoal gray |
| Ivory | White blue | Silver gray |
     These are just a few examples of color combinations. There are numerous other shade and tint combinations of brown and blue that can be used to create a wide range of colors.
