Color Tools— Guides & Articles

• How to Check Color Contrast in PowerPoint Slides

  Published 2026-07-26

  PowerPoint ships without a WCAG contrast checker. Here's how to extract hex codes from any slide and verify text and background pairs against AA and AAA.

  

• CMYK to RGB Accessibility Contrast: A Practical Workflow

  Published 2026-07-26

  Convert CMYK percentages to RGB and verify screen contrast for accessible text and UI using the W3C naive device-CMYK formula in your browser.

  

• CMYK Color Chart for DTF Printing from HTML Names

  Published 2026-07-25

  Build a CMYK color chart for DTF printing using the 148 standardized HTML color names. Search by keyword, copy exact HEX, then convert each value to CMYK.

  

• How to Convert Hex to RGB: A Practical Step-by-Step Guide

  Published 2026-07-25

  Convert CSS hex color codes to exact RGB channel values. Accepts #RGB, #RGBA, #RRGGBB, and #RRGGBBAA with normalized HEX, rgb/rgba output, and alpha bytes.

  

• How to Find the Complementary Color in RGB

  Published 2026-07-25

  Find the digital RGB complement of any hex color using the formula 255 minus each sRGB channel. Source and inverse swatches plus exact hex output shown.

  

• Free Color Palette Generator: Build Schemes From One HEX

  Published 2026-07-24

  Free color palette generator that turns one HEX into complementary, analogous, triadic, tetradic, and monochromatic schemes. Click any swatch to copy.

  

• How to Get a Color Gradient in InDesign: Step-by-Step

  Published 2026-07-24

  Follow the exact steps to build a gradient swatch in Adobe InDesign and apply it to fills, strokes, or text — then generate a matching CSS gradient for the web.

  

• How to Measure Color Difference Between Two HEX Colors

  Published 2026-07-24

  Measure the color difference between two opaque HEX colors with the CIEDE2000 formula. Convert sRGB to D50 CIELAB, read Delta E 2000, and interpret your result.

  

• How to Check Color Contrast in PDF Documents

  Published 2026-07-24

  Check color contrast in any PDF: extract text and background colors, then verify them against WCAG AA and AAA rules using a free contrast checker.

  

• CMYK to RGB: Preview Print Colors on Screen

  Published 2026-07-24

  Convert CMYK ink percentages to an approximate RGB color and hex value in your browser using the W3C naive device-CMYK fallback.