THE HEART FLAG
Specification
Version 1.0 (October 2026)
Designed by Fennel


The Heart Flag is a symbol for the ageplay community: a flag of three
horizontal bands with four hearts across the middle band. Every band and
heart is a solid color, with no border or outline.


STANDARD COLORS
---------------

Top band     black (#000000)
Middle band  white (#ffffff)
Bottom band  black (#000000)
Hearts       black (#000000)


CHOOSING COLORS
---------------

Custom coloring is encouraged, but the three bands and four hearts must
stay distinguishable. Regions that touch must never read as one: the
middle band must stand apart from the top band, the bottom band, and
every heart. The top and bottom bands may share a color, and so may the
hearts.

A quick check: if two touching regions look alike in black and white,
they're too close.


CONSTRUCTION
------------

Every measurement is a ratio of the flag width W_f, in any unit.

Symbol  Meaning
W_f     Flag width
H_f     Flag height
H_b     Band height
W_h     Heart width
H_h     Heart height
M_o     Outer margin
M_i     Inner margin
R_c     Lobe circle radius
D_v     Control point depth

Symbol  Definition   At W_f = 5850
W_f     Base unit    5850
H_f     2/3 W_f      3900
H_b     1/3 H_f      1300
W_h     2/13 W_f     900
H_h     2/15 W_f     780
M_o     same as W_h  900
M_i     1/6 W_h      150
R_c     17/60 W_h    255
D_v     4/5 H_h      624

D_v is measured down from the top of the heart's bounding box.


LAYOUT
------

The flag is 2:3: two units tall for every three wide. It is split into
three equal horizontal bands, each H_b tall.

The four hearts are centered vertically in the middle band, with an outer
margin at each end and an inner margin between neighboring hearts. These
add up exactly to the width of the flag:

    W_f = 2 M_o + 3 M_i + 4 W_h


HEARTS
------

1. Start with a bounding box W_h wide and H_h tall.
2. Fit a circle of radius R_c into the top-left corner, touching the top
   and left sides of the box.
3. Draw a Bezier curve from where the circle touches the left side of the
   box to the center of the bottom edge. Only the end at the circle gets a
   control point, placed on the left side of the box at D_v, measured down
   from the top of the box. The end at the bottom of the bounding box has
   no control point.
4. Repeat on the right side, mirrored: a circle in the top-right corner
   and a curve down to the same bottom point. The two circles overlap,
   and the point where they cross forms the dip between the lobes.
5. The heart's outline is the outer arc of each circle, from where it
   touches the side of the box up over the top to where the circles
   cross, then the two curves down to the bottom point.


LICENSE
-------

The Heart Flag belongs to the community it represents. The design is
released into the public domain under CC0 1.0 Universal:
https://creativecommons.org/publicdomain/zero/1.0/


CHANGES
-------

1.0  October 2026  First published version.