Suggestions for darkmode
The following packages have something in common with the package darkmode. The packages are ordered in decreasing similarity.
- ninecolors: Select colors with proper WCAG color contrast
 - gradient-text: Decorate text with linear gradient colors
 - traffic-light-protocol: Show TLP (Traffic Light Protocol) tags
 - tcolorbox: Coloured boxes, for LaTeX examples and theorems, etc.
 - coloredbelts: Insert colored belts in documents (to present skills, for example)
 - coloring: Define missing colors by their names
 - normalcolor: Changing \normalcolor
 - colorweb: Extend the color package colour space
 - colorinfo: Retrieve colour model and values for defined colours
 - spotcolor: Spot colours for pdfLaTeX
 - svgcolor: Define SVG named colours
 - latexcolors: Use color definitions from latexcolor.com
 - colorspace: Provides PDF color spaces
 - pdfcol: Macros for maintaining colour stacks under pdfTeX
 - opencolor: Definitions from the Open Color library
 - tangocolors: Use colors from the Tango color palette
 - colorwav: Colours by wavelength of visible light
 - clrstrip: Place contents into a full width colour strip
 - hycolor: Implements colour for packages hyperref and bookmark
 - palette: Create palettes for colors and symbols that can be swapped in
 - udepcolor: University of Piura (UDEP) institutional and corporate colors for digital and electronic media
 - xcolor: Driver-independent color extensions for LaTeX and pdfLaTeX
 - pagecolor: Interrogate page color
 - biochemistry-colors: Colors used to display amino acids, nucleotides, sugars or atoms in biochemistry
 - contour: Print a coloured contour around text
 - xcolor-material: Defines the 256 colors from Google Material Color Palette
 - css-colors: Named colors for web-safe design
 - colourchange: Colourchange
 - pdfcolfoot: Separate color stack for footnotes with pdfTeX
 - color-edits: Colorful edits for multiple authors of a shared document
 - pdfcolparcolumns: Fix colour problems in package 'parcolumns'