6 min read
Birthday colour or birthday color?
People type both spellings, and they mean the same lookup. Here is what the extra letter changes - and the one thing it does not.
Guides
Guides
Ten articles about using a birthday color rather than only looking it up: what goes with it, how it survives print, where it disagrees with a birthstone, and how to check it is readable.
Each guide opens with a working tool built from the same 366-color palette the rest of the site uses. Enter a date, a month or a season and the result is rendered from the real data - the hex values, the derived harmonies and the measured contrast ratios are computed, not illustrated.
The guides are written in English because the techniques they describe - WCAG contrast, sRGB and CMYK, the modern birthstone list - are documented in English. They are not a second product: every date they mention links back to its day page, and every claim about the palette can be checked there.
Reading times are estimated at about 200 English words per minute. That is a round planning convention, not a measurement of anyone's reading speed; a slower reader should expect longer, and the estimate covers the article's own prose rather than its tables, tool output or link lists.
6 min read
What goes with my birthday color?
One color is a starting point, not a palette. This is the method the site uses to build partners from a date - and how to pick between them.
6 min read
A birthday party theme from one color
A party needs five colors, not one: a base, an accent, a neutral, a highlight and an ink. The tool assigns them from the birthday and shows the hex values.
6 min read
Birthday colors by season
The palette is ordered by the calendar, so the seasons are already in it. Here is what each stretch contains - and a tool that lists every date in one.
6 min read
The leap day's birthday color
February 29 is the date most color systems skip. This palette has an entry for it, and a tool to check whether a given year contains it.
6 min read
Printing a birthday color chart
A printed chart is useful only if you know what it can promise. This tool prints one month at a time, with the values a print shop needs.
6 min read
Birthday color and birthstone
One system asks for your month, the other for your date. They are allowed to disagree, and the tool here shows both answers side by side.
6 min read
Making a birthday color readable
A color can be beautiful and still be unusable behind text. This guide shows the measured ratios for a date and the thresholds they are measured against.
6 min read
A brand palette from a birthday color
A birthday color can be a good seed for a personal brand or a small business. It cannot be the whole palette, and the tool here assigns the roles.
6 min read
A wedding palette from two birthdays
Two people, two dates, one palette. The tool takes both birthdays, picks a lead, computes the blend and prints the contrast for stationery.
How the tools work
Each guide carries one tool that reads the same palette as the finder. You choose a date, a month or a season, the page submits a plain GET request, and the answer is rendered on the server with the real hex values: palettes are computed with the site's color maths, and contrast ratios use the WCAG 2.1 relative-luminance formula.
Nothing is stored. The tool does not ask for an email, does not set a profile and does not remember the date you chose; the query string is the whole state, so a link to a result can be shared or bookmarked.