Color and Design Calculators
Create accessible palettes, mix colors, convert production color formats, size visuals, and prepare screen or print assets with design calculators.
This hub is curated around tasks, not just alphabetized links, so you can choose the right calculator before entering numbers.
Contrast Ratio Calculator
Evaluate color contrast ratios for WCAG accessibility compliance. Test text and background color combinations to ensure your content meets web accessibility standards.
Calculator groups by task
Use these groups to decide which calculator fits the question you are trying to answer.
Contrast Ratio Calculator
Evaluate color contrast ratios for WCAG accessibility compliance. Test text and background color combinations to ensure your content meets web accessibility standards.
Background Text Color Calculator
Find the best text color for any background color. Check WCAG contrast ratios, readability levels, and accessible color variations for UI design.
Luminance & Brightness Calculator
Calculate WCAG relative luminance and perceived brightness for any HEX color. Check color lightness for contrast, accessibility, and UI design.
Color Harmonies Generator
Create beautiful color palettes with our harmony generator. Explore triadic, analogous, split-complementary, and other color schemes to find the perfect combination for your designs.
Complementary Color Finder
Find a complementary color from any HEX or color picker input. Generate opposite RGB/HEX values and preview a paired palette for design contrast.
Color Mixer Calculator
Experiment with color mixing to predict resulting shades. Perfect for digital artists, web designers, and painters. Mix multiple colors and see real-time previews of the outcomes.
CSS Gradient Generator Calculator
Generate CSS gradient code with linear or radial directions, HEX color stops, and interpolated color steps for web backgrounds and UI design.
RGB to Hex Calculator
Convert RGB color channel values into a six-digit hex color code for CSS, design tools, accessibility checks, and web projects.
HEX to CMYK Converter
Transform web colors to print-ready CMYK values. Essential tool for designers and print professionals working across digital and physical media formats.
Pantone to RGB & HEX Converter
Convert common Pantone color codes to approximate RGB and HEX values for digital design. Preview swatches and copy web-ready color references.
Aspect Ratio Calculator
Calculate and maintain aspect ratios for images and videos. Convert between different aspect ratios, find optimal dimensions for various display formats, and ensure proper scaling while maintaining proportions.
Print Size Calculator
Convert pixel dimensions and DPI into print size estimates for photos, posters, design files, and high-resolution artwork.
Focal Length Calculator
Calculate 35mm equivalent focal length, crop factor, lens category, and field-of-view comparisons for common camera sensors.
Which design calculator helps with accessibility?
Use the contrast ratio calculator first, then check background text color and luminance to confirm readable color combinations.
Why include photo and print calculators in a color hub?
Design work often moves from palette choices into image sizing, aspect ratios, focal length, and print measurements, so the hub keeps those steps connected.
Are Pantone, CMYK, RGB, and HEX conversions identical?
No. Color spaces and printing conditions differ, so conversions are practical approximations for planning and handoff rather than guaranteed physical color matches.
Need a different tool?
Browse the full calculator directory or return to every topic hub.