Harmonic Schemes
Click on any swatch to set it as current active color.
Complementary
Analogous
Triadic
Monochromatic
Material Design Shades (50 - 900)
Nearest Web Safe Color
Export Active Harmony Palette
WCAG Contrast Analyzer
Real-time contrast ratio checks against WCAG 2.1 standards for text, buttons, and graphics.
Tested on White (#FFFFFF)
Sample Typography
Ratio: --
AA
AAA
Large Text
Tested on Black (#000000)
Sample Typography
Ratio: --
AA
AAA
Large Text
Compare Against Custom Background Color
Custom Background Contrast Preview
Contrast Ratio: --
Color Vision Deficiency Simulation
Visual preview of your active color as perceived by individuals with color vision impairments.
Normal Vision
Protanopia (Red-Blind)
Deuteranopia (Green-Blind)
Tritanopia (Blue-Blind)
Achromatopsia (Monochromacy)
CSS Linear Gradient Generator
90°
Extract Palette From Image
Drag and drop an image file (PNG, JPG, WebP) or click to upload and sample colors.
📷 Drag & Drop Image Here or Click to Select
Batch Color Conversion Engine
Enter one color per line (HEX, RGB, or HSL) to convert simultaneously.
Client-Side Developer API
Access our integrated color calculation engine directly through your console or user scripts:
// Global NCS Color API available on window
window.NCSColorAPI.convert("#3b82f6");
// Returns: { hex, rgb, hsl, cmyk, tailwind, wcag, harmonies }