Preview any color in your buffer in real time.
🎨 colorful-mode is a minor mode that allow you highlight/preview any color format such as color hex and color names, in your current buffer in real time and in a user friendly way based/inspired on 🌈rainbow-mode.el.
Support for custom color string indicator.
Change color support in real time.
Support for color changing at region.
Customizable User options
colorful-allow-mouse-clicks (default: t) If non-nil, allow using mouse buttons for change color.colorful-use-prefix (default: nil) If non-nil, use prefix for preview color instead highlight them.Warning
css-derived modes colorize rgb and hex colors out the box, this may interfere with colorful prefix, you can disable this setting ‘css-fontify-colors’ to nil
colorful-prefix-string (default: "●") String to be used in highlights. Only relevant if `colorful-use-prefix’ is non-nil.colorful-prefix-alignment (default: 'left) The position to put prefix string. The value can be left or right. Only relevant if `colorful-use-prefix’ is non-nil.colorful-extra-color-keyword-functions default: ‘(colorful-add-hex-colors (emacs-lisp-mode . colorful-add-color-names) ((html-mode css-mode) . (colorful-add-css-variables-colors colorful-add-rgb-colors colorful-add-hsl-colors colorful-add-oklab-oklch-colors colorful-add-color-names)) (latex-mode . colorful-add-latex-colors)) List of functions to add extra color keywords to colorful-color-keywords.
It can be a cons cell specifying the mode (or a list of modes) e.g:
(((css-mode css-ts-mode) . colorful-add-rgb-colors) (emacs-lisp-mode . (colorful-add-color-names colorful-add-rgb-colors)) ((text-mode html-mode) . (colorful-add-color-names colorful-add-rgb-colors)) …)
Or a simple list of functions for executing wherever colorful is active: (colorful-add-color-names colorful-add-rgb-colors)
Available functions are:
colorful-exclude-colors (default: '("#define")) List of keywords not to highlight.colorful-short-hex-conversions (default: t) If non-nil, colorful will converted long hex colors to "#RRGGBB" format. Setting this to non-nil can make converted hex inaccurate.colorful-only-strings (default: nil) If non-nil, colorful will only highlight colors inside strings. If set to `only-prog’, the colors in `prog-mode’ will be highlighted only if they are inside a string, this doesn’t include `css-mode’ and derived.colorful-highlight-in-comments If non-nil, colorful will highlight colors inside comments. NOTE: If this is set, this will highlight any keyword within the comments, including color names, which can be annoying.colorful-html-colors-alist Alist of HTML colors. Each entry should have the form (COLOR-NAME . HEXADECIMAL-COLOR).global-colorful-modes (default: '(prog-mode help-mode html-mode css-mode latex-mode)) Which major modes global-colorful-mode is switched on in (globally).colorful-base Face used as base for highlight color names. Changing background or foreground color will have no effect.colorful-change-or-copy-color Change or copy color at point to another format.colorful-convert-and-change-color Convert color at point or colors in region to another format.colorfu-convert-and-copy-color Convert color at point to another format and copy it to the kill ring.colorful-mode Buffer-local minor mode.global-colorful-mode Global minor mode.These key bindings are defined by: colorful-mode-map
C-x c x → colorful-change-or-copy-color.C-x c c → colorful-convert-and-copy-color.C-x c r → colorful-convert-and-change-color.If you want to use css rgb colors outside css-derived modes, you can add them to `colorful-extra-color-keyword-functions’ in your config.
(add-to-list 'colorful-extra-color-keyword-functions '(insert-your-major-mode . colorful-add-rgb-colors))
If you want also use hsl and rgb together you can use this
(add-to-list 'colorful-extra-color-keyword-functions '(insert-your-major-mode . (colorful-add-rgb-colors colorful-add-hsl-colors)))
colorful provides extra functions out-the-box that enable additional highlighting:
colorful-add-hex-colors: Add Hexadecimal colors highlighting.colorful-add-color-names: Add color names highlighting.colorful-add-css-variables-colors: Add CSS user-defined color variables highlighting.colorful-add-rgb-colors: Add CSS RGB colors highlighting.colorful-add-oklab-oklch-colors: Add CSS OkLab and OkLch colors highlighting.colorful-add-hsl-colors: Add CSS HSL colors highlighting.colorful-add-latex-colors: Add LaTeX rgb/RGB/HTML/Grey colors highlighting.See: colorful-extra-color-keyword-functions for more details.
It’s recommended that you must use emacs-28.x or higher.
For install colorful run:
M-x package-install colorful-modeOnce you have it installed you can activate colorful locally in your buffer with M-x colorful-mode, if want enable it globally without using hooks then you can do M-x global-colorful-mode
Example (Personal) configuration for your init.el:
(use-package colorful-mode ;; :diminish ;; :ensure t ; Optional :custom (colorful-use-prefix t) (colorful-only-strings 'only-prog) (css-fontify-colors nil) :config (global-colorful-mode t) (add-to-list 'global-colorful-modes 'helpful-mode))Disable colorful in regions
If you want to disable colorful at region this hack may be useful for you:
(add-hook 'post-command-hook
(lambda ()
"delete colorful overlay on active mark"
(when-let* (colorful-mode
(beg (use-region-beginning))
(end (use-region-end)))
;; Remove full colorful overlay instead only the part where
;; the region is.
(dolist (ov (overlays-in beg end))
(when (overlay-get ov 'colorful--overlay)
(delete-overlay ov))))))
(add-hook 'deactivate-mark-hook
(lambda ()
"refontify deleted mark"
(when-let* (colorful-mode
(beg (region-beginning))
(end (region-end)))
(font-lock-flush beg end)))) How does it compare to rainbow-mode or built-in css fontify colors?
colorful-mode improves rainbow-mode and css fontify-colors in adding more features:
[1] rainbow-mode (like colorful) uses regex for highlight some
keywords, however it cannot exclude specifics colors (such as
"#def" that overrides C "#define" keyword).
[2] Only for some colors.
[3] I didn't a benchmark however due colorful-mode uses overlays
instead text properties it can be a bit slow.
The intention is to provide a featured alternative to rainbow-mode.el and css-fontify-colors with a user-friendly approach.
If you prefer only highlights without color conversion, prefix/suffix string indicator and/or anything else you can use rainbow-mode.el.
or something built-in and just for css then use built-in css-fontify-colors which is activated by default
On the other hand, if you want convert colors, overlays, optional prefix strings and more features you can use colorful-mode.el.
colorful-mode is part of GNU ELPA, if you want send patches you will need assign copyright to the Free Software Foundation. Please see the CONTRIBUTING.org file for getting more information.
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