Poline
Esoteric Color Palette Generation Library
https://meodai.github.io/poline/

Shader Gradient
Make your designs alive. Shadergradient is a new tool to create beautiful, moving gradients https://www.shadergradient.co/

Randoma11y
Accessible color combinations
https://randoma11y.com/

OKLCH Color Picker
OKLCH is a new way to encode colors (like hex, RGBA, or HSL)
https://oklch.com/

Realtime Colors
Visualize your color palettes on a real website for the first time
https://realtimecolors.com/

Alphredo
Create translucent versions of your colors. Generates translucent (alpha) colors that look the same as their opaque counterparts when placed against the same background
https://alphredo.app/

Color and Contrast
An interactive guide to color & contrast
https://colorandcontrast.com/

Leonardo
An open source contrast-based color generator
https://leonardocolor.io/

Color Parrot Compagnion
Information about color companion site
https://parrot.color.pizza/

Colors Tools
Take the guesswork out of picking the right colors for your next artwork and user interface
https://www.colors.tools/

Colors Combinations
Where can we get inspiration to create unique colors combinations
https://colors.combinations.obys.agency/

Conic Style
Nice, simple conic gradients
https://www.conic.style/

Colorion
Curated color palettes with search and tags support
https://www.colorion.co/

Color Selector
A database of color & images for artists, designers, photographers, printers or curious people and more
https://www.color-selector.com/

MESH
Create beautiful gradients right in your browser
https://meshgradient.com/

colors.lol
Overly descriptive color palettes. Created as a fun way to discover interesting color combinations
https://colors.lol/

Gradienta
Multicolor CSS gradients, JPG downloads, 100% free
https://gradienta.io/

Colorsinspo
Thousands of beautiful color palettes you can use directly by one click
https://colorsinspo.com/

calcolor.co
A new way to find, modify and share digital colors. Leave abstract color models behind and focus on perception
https://calcolor.co/

Who Can Use
A tool that brings attention and understanding to how color contrast can affect different people with visual impairments
https://whocanuse.com/

Happy Hues
A color palette inspiration site that acts as a real world example of how the colors could be used in design
https://www.happyhues.co/

Colorkit
Generates color scales by mixing the shades between two colors. Enter a start and end color to get a full scale
https://colorkit.io/

Shade Generator
Generate color codes for shades and tints of the colors you use everyday
https://www.shadegenerator.com/

Color by Cloudflare Design
A color palette tool for interface design
https://cloudflare.design/color/

Open Color
An open-source color scheme optimized for UI like font, background, border, etc.
https://yeun.github.io/open-color/

Mycolorpanda
A color gradient generator tool which helps you create realtime CSS gradients
https://www.mycolorpanda.com/

Muzli Colors
Color palette generator — create beautiful color schemes
https://colors.muz.li/

Gradient Magic
A gallery of fantastic and unique CSS Gradients
https://www.gradientmagic.com/

Colors by Klart
Beautiful and data driven color palettes
https://klart.io/colors/

Khroma
The AI color tool for designers. Discover, search, and save color combinations you'll love
http://khroma.co/

Stark
The color-blind simulator and contrast checker for Sketch & Adobe XD. Design with accessibility in mind
http://www.getstark.co/

HTML Color Codes
Easily find HTML color codes for your website using a color picker, color chart and HTML color names
https://htmlcolorcodes.com/

Culrs
Gives you a simple smart approach to choose color palettes
https://culrs.com/

Contrast Ratio
Easily calculate color contrast ratios. Passing WCAG was never this easy!
https://contrast-ratio.com/

Color Lisa
Color palette masterpieces from the world's greatest artists
http://www.colorlisa.com/

Color Safe
Empowering designers with beautiful and accessible color palettes based on WCAG Guidelines of text and background colors
http://colorsafe.co/

Color Oracle
Free color blindness simulator for Windows, Mac and Linux
http://colororacle.org/

Color Designer
Generate easily a color palette for your project. Also generates tints and shades
https://colordesigner.io/

Color Review
What you need to know about colors & accessibility. A modern tool for exploring and finding accessible colors
https://color.review/

ColorSlurp
The ultimate color productivity booster for developers or designers
http://colorslurp.com/

Palettte App
Helps you to create, analyze and edit smooth color palettes
https://palettte.app/

Pigment
A unique way to generate fresh and vibrant colors based on lighting and pigment, instead of math
https://pigment.shapefactory.co/

Flat UI Colors 2
A total set of 14 color palettes and 280 colors for your designs, projects, presentations and other needs
https://flatuicolors.com/

COLOURlovers
An international community of designers and artists of all kinds who visit the site to get color inspiration
https://www.colourlovers.com/

Adobe Color CC
Create color schemes with the color wheel or browse thousands of color combinations
https://color.adobe.com/create/color-wheel/

ColorBox
A color tool to produce color sets. Made by Lyft Design
https://www.colorbox.io/

Colourco.de
Online designer tool, which allows you to easily and intuitively combine colours
https://colourco.de/

Color Claim
Created by Tobias van Schneider to collect & combine unique colors for future creative projects
https://www.vanschneider.com/colors

Site Palette
A browser extension to generate comprehensive palettes. A must-have tool for designers and frontend developers
http://palette.site/

Coolors.co
The super fast color schemes generator. Create, save and share perfect palettes in seconds
https://coolors.co/

ColorSpark
A simple and effective tool that generates random colors and gradients
https://colorspark.app/

Tint and Shade Generator
Easily make tints and shades in 10% increments
https://maketintsandshades.com/

Sip for Mac
The best way to collect, organize & share your colors
http://sipapp.io/

uiGradients
A handpicked collection of beautiful color gradients for designers and developers
https://uigradients.com/

Color Leap
Search through 180 color palettes used throughout the last 4000 years
https://colorleap.app/home

Material Design Palette Generator
Make perfect Material Design color palettes from any hex input, and get color recommendations
https://materialpalettes.com/

CSS Gradient
A free CSS gradient generator tool that lets you create a colorful gradient background
https://cssgradient.io/

Contrast
A macOS app for quick access to WCAG color contrast ratios
https://usecontrast.com/

Blend
Create and customize beautiful CSS3 gradients
http://www.colinkeany.com/blend/

Wheel
Playful color wheel generator
https://hihayk.github.io/wheel/

Scale
Playful color scales generator
https://hihayk.github.io/scale/

BrandColors
The biggest collection of official brand color codes around. Includes hex color codes for 500+ brands
https://brandcolors.net/

Web Gradients
A free collection of 180 linear gradients that you can use as content backdrops in any part of your website
https://webgradients.com/

Grabient
Beautiful and simple UI for generating web gradients
https://www.grabient.com/

ColorSpace
Find the perfect matching color scheme for your next project. Generate nice color palettes
https://mycolor.space/

Picular
A rocket fast primary color generator using Google's image search
https://picular.co/

Color Hunt
Color palettes for designers and artists. Thousands of trendy hand-picked color palettes
https://colorhunt.co/