Language: TypeScript (*.ts, .tsx), SCSS (.scss) Rules:

• Start using create-react-app
• Adding additional libraries is forbidden
• function keyword is forbidden
• redux is forbidden
• Everything has to be typed as a result
• Known types have to be omitted (const str = 'test'; > const str: string = 'test';)
• any and unknown type is forbidden
• object type is forbidden - objects has to be described by eg.: { someProp: string; }
• Code have to be splitted into components - You have to use at least once function component and class component correctly
• Styles have to be written in *.scss files and imported in *.ts(x) files
• Styles have to be written by programmer - not imported from external source
• Styles cannot be written inline (in JS/TS files)
• All relations between JS and CSS have to be achieved using selectors, CSS variables and custom data-* attributes

Result application:

• Have to have two forms
• First form allows add new color to database
• Form have to be submitted by onSubmit event
• Colors will be saved in LocalStorage in some way
• Color have to be checked, parsed before adding
• Color have to be in HEX RGB form
• Writting non valid characters have to be blocked
• Writting too many characters have to be blocked
• Writting # (except first character) have to be blocked
• Second form allows filter colors displayed below
• After every change list of colors are changed
• Displayed colors have to meet ALL selected by user conditions, possible conditions:
  • Red > 50% means Red in RGB is higher that 127 - Green > 50% means Green in RGB is higher that 127 - Blue > 50% means Blue in RGB is higher that 127 - Saturation > 50% means Saturation in HSL is higher than 50%
• List of colors have to contains all colors:
• Listed in predefined, default list:
• You cannot remove them, so "x" should be hidden
• Listed in LocalStorage, added by user:
• They should be removable
• Colors have to be named using HEX RGB form, with uppercase
• Colors have to be represented by colored rectangle above name
• Colors have to be ordered in such way:
• Higher Red value first; if the same then:
• Higher Green value first; if the same then:
• Higher Blue value first; if the same then on the same position