Color Reverse Calculator & Mixer

The Reverse Calculator assumes that your target color is a weighted mix of one or more fixed colors and an unknown color. For the 2‑color mode it uses the model target = fixed × R + unknown × (1 − R). With a known fixed color F, target color T and mixing ratio R (between 0 and 1), the required color C is solved channel‑by‑channel as C = (T − F × R) / (1 − R).

In 3‑color mode the tool models the target as target = fixed1 × r1 + fixed2 × r2 + unknown × r3, where r3 = 1 − r1 − r2. It then solves the unknown color for each RGB channel using C = (T − F1 × r1 − F2 × r2) / r3. If the calculation produces values slightly outside the 0–255 RGB range, the result is clamped back into 0–255 and shown as a "Closest Possible Match".

The Color Mixer mode does the forward calculation: result = color1 × R + color2 × (1 − R), again evaluated separately for the R, G and B channels. For both modes, the tool updates HEX and RGB values in real time and also searches the coated Pantone palette for the nearest color to the computed result.