Lock how many color codes and record color rules how?

The question about the number of color codes may sound technical, but it is actually a question about control: the more control you have, the more consistent the brand will be. An overly broad color palette, lacking clear rules, is a common reason why the same brand looks different across various publications.

You should lock how many colors.

There are no absolute numbers, but there is a concise framework sufficient for most small and medium enterprises:

• Primary color: one to two colors. This is the core identifying color, appearing most frequently and consistently across all touchpoints.
• Secondary color: two to three colors. Used to support, create variations, or establish content hierarchy, without competing with the primary color.
• Neutral color: two to three colors, typically white, black, gray, or earth tones. Used for backgrounds, body text, and breathing space.

If the brand has multiple product lines that need to be differentiated by color, the palette can be expanded, but even then, it must clearly specify which colors belong to which line and in what context they are used. The broader the palette, the stricter the rules must be, not the other way around.

Record color codes sufficient for both environments

The same color will display differently on screens and in print, as these two environments create color in different ways. Screens emit light (RGB system), while paper, fabric, paint, and plastic reflect the light that hits them. Even in printing, the same four-ink formula on coated and uncoated paper yields two different colors. Therefore, each color in the palette needs to have all the necessary code layers recorded.

• HEX and RGB: used for digital design, websites, social media, application interfaces.
• CMYK (Cyan, Magenta, Yellow, Key/Black, the four-color printing system): used for standard printing such as flyers, catalogs, business cards.
• Pantone (global standard color matching system): is needed when there is printed packaging, uniforms, signage, or any items that require color consistency across different print runs and suppliers.

Missing one of these codes, the design team will have to convert it themselves, and manual conversion results are often inconsistent.

The color palette should explain the emotional intent and how it can evolve as the brand grows, not just be a series of color codes. Color is a language, not a list.

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Color is a target with a tolerance range, not a single code

No material matches perfectly with another: dyed fabric, wall paint, acrylic, decals, and light boxes all have their own color reproduction ranges, and many bright colors on screens do not exist in any material. The lighting at the viewing location also changes the results, so the printing industry compares colors under standard lighting (ISO 3664). Therefore, the designer's job is to define the target and tolerance (acceptable deviation) for each material, and to select a master sample to resolve discrepancies between two locations. Without a master sample, each workshop will choose the closest color they can produce, resulting in ten different colors from ten workshops.

Doing so is labor-intensive: it requires test prints, approvals, and maintaining physical samples, and placing two materials side by side can still reveal slight discrepancies to the discerning eye. For brands that exist only on screens, there are no materials to deliver, but since each machine displays colors differently, consistency can only be checked within a range. Colors that convey safety information or industry standards should adhere to those standards.

Stating color law is more important than stating color codes.

Many standards stop at listing HEX codes. This is insufficient. Color codes indicate what the color is, but new color rules explain how to use the color. A usable color palette needs to include:

• The role of each color: which color is dominant, which is used as a support, and which appears only in specific contexts?
• Usage ratio: How much area is occupied by the primary color, and how is the accent color used sparingly. If the ratio is not recorded, the team will turn the accent color into a background color excessively.
• Text rules on colored backgrounds: white or dark text placed on any colored background must ensure sufficient contrast for readability, especially important when the brand has a digital presence.
• Colors that should not be arbitrarily mixed: specify clearly to avoid teams creating intermediate shades that dilute the color palette.

Common errors when creating color palettes

• Only record HEX, without CMYK or Pantone. When printing is needed, the team converts it themselves, resulting in colors that differ from the screen, and no one knows what the standard is.
• Opening the scope too wide for flexibility. As a result, each person chooses their preferred tone, and the brand gradually becomes diluted over time.
• Not documenting ratios and roles, only names and codes. The team turns accent colors into the primary color, causing the brand to lose focus.
• Having a code without a physical sample and tolerance means that when two materials differ, no one can make a judgment.
• The color palette should be detached from practical usage context: no examples of text on colored backgrounds, no examples in print or web contexts.

This article is for reference. The scope, pricing, and specific commitments of Sinh Vũ are detailed in the proposal and signed contract.