What this Color Mix Calculator does
The Color Mix Calculator estimates how much of a second digital color to blend with a first color to move toward a target. It works with red, green, and blue channel values from 0 to 255, the familiar format used to describe colors on screens. Enter all three RGB values for each color, and the result is the estimated percentage of Color 2 in the blend.
The calculation treats the colors as points in a three-dimensional RGB space. It projects the target onto the straight line between Color 1 and Color 2, then reports the position along that line as a percentage. A result near 0% means the target is closer to Color 1 along this path. A result near 100% means it is closer to Color 2. A value outside that span indicates that the target lies beyond one end of the line, so the displayed percentage should be read as a mathematical estimate rather than a physical mixing instruction.
This is a digital approximation. Screen color values do not predict paint, ink, dye, or other material behavior exactly. Pigments may absorb and scatter light in different ways, and device displays may show the same RGB values differently.
How to use the Color Mix Calculator
Enter the red, green, and blue channel values for your two starting colors and the target color. Each channel must be an integer from 0 through 255. If you have a hex color code, convert it into its three RGB channel values first. For example, a code such as #4080C0 represents red 64, green 128, and blue 192.
- Set Color 1. Enter its red, green, and blue values in the first three fields.
- Set Color 2. Enter the second color's three channel values.
- Enter the target. Add the red, green, and blue values you want the blend to approach.
- Read the result. The percentage estimates Color 2's share on the straight-line path between the two colors.
For a worked example, let Color 1 be (64, 96, 128), Color 2 be (192, 64, 64), and the target be (128, 80, 96). The formula multiplies each target-minus-Color-1 difference by the corresponding Color-2-minus-Color-1 difference and adds those products. Here those products are 64 × 128, −16 × −32, and −32 × −64, totaling 9,216. It divides that by the sum of the squared Color 2 differences, plus 1: 128² + (−32)² + (−64)² + 1 = 20,481. Multiplying the ratio by 100 gives about 45.00% Color 2. The target in this example sits near the middle of the RGB line between the two inputs.
How the Color Mix Calculator formula works
For each channel, the formula finds the difference between the target and Color 1, then the difference between Color 2 and Color 1. It multiplies matching differences and adds the three results. This combined value measures how far the target points in the direction of Color 2. The denominator adds the squares of Color 2's channel differences, giving the squared length of the line between the two starting colors.
The ratio is multiplied by 100 to express the position as a percentage. A small constant of 1 is added to the denominator so the expression remains defined when Color 1 and Color 2 have identical channel values. With identical colors, there is no direction or meaningful mixing proportion to infer, so the resulting percentage should not be treated as useful guidance.
The calculation uses the supplied channel values directly. It does not convert RGB to a perceptually uniform color space, model gamma correction, or account for lighting and display calibration. Its purpose is to give a clear, repeatable estimate within a simple RGB model.
Use cases for the Color Mix Calculator
Designers and makers can use the estimate when exploring digital palettes and documenting how a target relates to two existing colors. It can help organize a color study, compare swatches, or create a starting point for a gradient or interface palette. Illustrators may use it to understand whether a target is closer to one selected color or the other along a basic RGB blend.
- Compare a target swatch with two known RGB colors.
- Record a repeatable digital blending estimate for a design study.
- Explore color relationships while preparing screen-based artwork.
- Check whether a target falls between the two selected colors in RGB space.
For practical craft work, treat the output as a planning clue. Mix a small physical sample, let it dry if relevant, and inspect it under the light where the finished work will be seen. The calculator cannot account for a particular brand's pigments or material surface.
Other factors to consider when calculating a color mix
RGB is an additive model: red, green, and blue light combine to create colors on a display. Paint and ink typically rely on subtractive behavior, where materials absorb portions of the light reflected from a surface. Because these processes differ, a digital percentage does not translate directly into equal portions of two paints.
Perception also depends on context. A color can appear different beside a warm background, under cool lighting, or on a screen with different brightness and calibration. Surface texture, gloss, opacity, and drying can shift the appearance of physical materials. Even in digital work, the selected color profile and output device affect what viewers see.
Use consistent input data and keep notes about the color source and viewing conditions when precision matters. If the target cannot be reached by a straight-line blend of the two selected RGB colors, consider choosing different starting colors or using a more specialized color workflow. The percentage describes only the model and inputs entered here.
Frequently asked questions
Does the percentage give an exact paint recipe?
No. It estimates a position between digital RGB values. Physical pigments interact differently, so test a small sample and adjust it by observation.
Can the result be below 0% or above 100%?
Yes. That means the target projects outside the segment between the two colors on the RGB line. It is an extrapolated position, not a blend contained by the two endpoints.
What if both starting colors are identical?
There is no distinct direction between identical colors, so a meaningful share cannot be inferred. The formula remains defined, but its percentage should be disregarded in that case.
How do I get RGB values from a hex code?
Use a color picker or design application that displays RGB channels. A six-digit hex code contains a pair of hexadecimal digits for red, green, and blue, respectively. Convert or copy those channel values into the fields.
Why might a screen show a different color?
Displays vary in calibration, brightness, and color profile. Ambient light and nearby colors also affect perception, so use the same viewing setup when comparing digital samples.