| A HEX input is rejected | Characters or length do not match a supported HEX format. | Use 3, 4, 6 or 8 hexadecimal digits with an optional leading #. |
| The RGB result seems unexpected | HEX pairs were read in a different order or a shorthand code was misunderstood. | Check red, green and blue channel order and expand shorthand digits. |
| Opacity disappears after conversion | Six-digit HEX does not encode alpha. | Use RGBA or eight-digit HEX and review the alpha value. |
| Transparent colors look different | They are composited over different backgrounds. | Compare the same alpha color on the actual intended background. |
| CMYK values differ from a print vendor | The web calculation does not use the vendor ICC profile. | Request profile-aware conversion and a physical or calibrated proof. |
| Screen eyedropper is unavailable | Browser permissions or EyeDropper API support may be missing. | Use a supported secure browser or the built-in picker. |
| The pasted CSS color is invalid | Syntax or separators may not match a supported parser. | Check function spelling, channel ranges and punctuation. |
| Colors extracted from an image look dull | Compression, lighting and sampling affect image colors. | Use a higher-quality source and refine the extracted palette. |
| Saved favorites have disappeared | Browser data may have been cleared or private mode ended. | Restore a separate exported palette backup if available. |
| History does not appear on another device | IndexedDB is browser-local. | Export the colors and import or copy them on the other device. |
| Offline mode does not load | Required application resources were not previously cached. | Load the app online first and check browser cache or offline settings. |
| Contrast check fails | Foreground/background luminance difference is insufficient. | Adjust one color’s lightness and rerun the check. |
| Contrast result varies over a gradient | The background luminance changes across the area. | Test text over the least-contrasting point or add a solid text surface. |
| Color-blind simulation is inconclusive | Visual simulation cannot reproduce every individual perception. | Use explicit labels and patterns, plus practical accessibility testing. |
| Tailwind output does not compile | Config format can vary by Tailwind version. | Adapt exported tokens to the framework version in the project. |
| CSS variable conflicts with another token | A generated name duplicates an existing property. | Rename tokens with unique semantic naming conventions. |
| Large bulk conversion is slow | Many rows and format calculations increase local rendering work. | Process the list in smaller batches and export incrementally. |
| Some bulk entries fail to parse | Input contains mixed or unsupported values. | Clean the affected entries and retry the valid rows. |
| The converted value differs by one digit | Rounding occurs when converting decimal model values or alpha. | Retain the authoritative source channels and inspect precision settings. |
| The screen preview differs from print | Display colors use emitted light while print relies on inks and paper. | Use a calibrated print workflow and device-specific proof. |
| SVG export looks different elsewhere | External viewers may handle styles or color profiles differently. | Open the SVG in the target viewer and confirm its colors. |
| The JSON export fails in a design tool | The consuming software expects a different token schema. | Map the exported color values to the accepted schema. |
| An image cannot be opened | The file may be damaged or unsupported in the current browser. | Try a valid PNG, JPG, WEBP or SVG with a reasonable size. |
| A selected color does not copy | Clipboard permission or browser security policy blocks copying. | Use a secure context and manually select the displayed value. |