What Colors Make Red?

The answer depends on which color system you are working in. On screens (RGB) and in the traditional painter's model (red, yellow, blue), red is a primary color, so no other colors in that system combine to produce it. In process printing (CMYK), red is made by overlapping magenta and yellow ink. For a vector logo, this matters because the same red usually has to be defined separately for screen, process print and, sometimes, spot-color print.

How red is produced in each color model

Color model | Typical use | How red is produced

RGB (additive light) | Screens, websites, apps, digital logo files | Red is one of the three primary channels: red at full strength, with green and blue at zero

CMYK (subtractive ink) | Process printing | Magenta and yellow inks overlap; black or a little cyan can be added to deepen it

RYB (traditional paint) | Paint mixing and art education | Red is treated as a primary and is not mixed from the other two

Spot color | Print with premixed ink | The ink is mixed to a formula before printing rather than built from process dots on press

Why red is a primary in some systems and a mix in others

Screens emit light, and adding light makes colors brighter. An RGB display builds every color from red, green and blue light, so red is a starting point rather than a result. Ink works the opposite way: it absorbs, or subtracts, parts of the light that hits the paper. Magenta ink absorbs mostly green light and yellow ink absorbs mostly blue light. When the two overlap, mainly red light is reflected back, so the area looks red. That is why magenta plus yellow makes red in print, while red plus green makes yellow on a screen.

The painter's red, yellow and blue model comes from older pigment practice and still treats red as unmixable. In practice, a magenta-leaning paint mixed with yellow can approximate a red, which reflects the same subtractive principle used in CMYK printing.

How pure red is written in vector logo files

Design tools describe the same nominal red in several notations. The values below are the mathematical definitions of full-strength red, not a recommended brand color:

RGB:   255, 0, 0
Hex:   #FF0000
HSL:   0°, 100%, 50%
CMYK:  C 0%  M 100%  Y 100%  K 0%   (nominal starting point)

Most brand reds are not these exact values. The CMYK build in particular is only a starting point, because the printed result depends on the paper, the press and the color profile used for conversion.

Adjusting red: darker, lighter, warmer or cooler

• Darker (a shade): lower brightness in RGB or HSL, or add black in CMYK. A small amount of cyan also deepens and dulls red in print.
• Lighter (a tint): raise lightness in HSL or reduce the magenta and yellow percentages in CMYK so more paper shows through. A lighter red quickly reads as pink.
• Warmer, toward orange: in CMYK, use more yellow than magenta; in RGB, add some green.
• Cooler, toward crimson: in CMYK, use more magenta than yellow; in RGB, add a little blue.
• More muted: add a small amount of its complement (cyan or green), which lowers saturation.

What this means for a logo color palette

Define red for each output instead of converting one value automatically. Bright screen reds often fall outside what CMYK inks can reproduce, so a vivid RGB red converted to CMYK may print noticeably duller. A soft proof in the design tool, followed by a printed proof, is the reliable way to judge the result.

When a red must match consistently across print runs, materials or vendors, a spot ink is often specified. Choose that ink from the ink system's physical guide rather than from screen appearance. No specific spot-color match was supplied for this article, so any such pairing needs to be confirmed against current guides and the printer's proofs.

In the vector file, apply red through a global or named swatch so that one edit updates every path that uses it. Changing a swatch recolors vector fills and strokes, but it does not change embedded raster images or raster previews. Before relying on a file, inspect it in outline or wireframe view to confirm that the red elements are actual vector shapes. A file extension such as SVG, AI, EPS or PDF does not by itself guarantee editable paths.

Red and green are hard to tell apart for people with the most common forms of color vision deficiency. Avoid using red as the only signal of meaning in a logo system, and check its contrast against the backgrounds where the logo will appear.

If you are recoloring someone else's logo, remember that being able to download the file is not the same as having permission to modify the artwork, change its fonts or use the trademark.

Limits of this answer

No brand-specific red, color measurements, ink formulas or print tests were supplied. The numbers above are standard color-model definitions, not verified print results. Exact CMYK builds and spot-color matches depend on the printing conditions and should be confirmed with proofs from the printer who will produce the work.