Style combination · Pairs well

Flash Vector Cartoon × Rubber-Hose Revival

Both run on rounded, pie-eyed figures; borrow its period title lettering for an Old-Timey parody like Homestar Runner's.

From the research on Flash Vector Cartoon (Newgrounds-Era Web Animation)

Mix them and make something Flash Vector Cartoon Rubber-Hose Revival

A sample layout drawn from the recipe: shapes from Rubber-Hose Revival, their arrangement from Rubber-Hose Revival, the finish from Rubber-Hose Revival. Not a real work, and not an image of either style.

What each style brings

Each part of the design comes from the style with the stronger say in it, and each style gives at least two.

Flash Vector Cartoon (Newgrounds-Era Web Animation) Rubber-Hose Revival (Cartoon Mascot Graphics)

Type from Flash Vector Cartoon: Hand-lettering
Colour from Flash Vector Cartoon: Flat fields
Gradients

Rubber-Hose Revival avoids gradients: this is where the two pull against each other.
Form from Rubber-Hose Revival: Distortion & exaggeration
Rounded & pill
Composition from Rubber-Hose Revival: Isolated object
Single focal point
Surface from Rubber-Hose Revival: Flat

The type

Open fonts standing in for each style’s own type, which is often hand-drawn or commercial.

Display · Flash Vector Cartoon

Wow

Pixelify Sans, standing in for Bitmap-emulating pixel fonts made to stay crisp at small sizes in Flash (e.g. Craig Kroeger's Miniml) for interface text such as preloaders, menus and buttons

Text · Rubber-Hose Revival

A present-day revival of 1920s and 1930s American cartoon drawing: characters with bendy, jointless 'rubber hose' limbs, round bodies, big white eyes and gloved hands, drawn in a confident black outline and filled with a few flat colours. Studio MDHR's hand-animated Cuphead (2017) made it a contemporary look; from there it moved into games, motion graphics and, by the mid-2020s, food brands whose mascot is a burger, coffee cup or devil with springy arms beside soft, bouncy lettering.

Zen Maru Gothic; Rubber-Hose Revival used Hand-lettered titles in the manner of early-1930s cartoon title cards and Soft, heavy round-serif display faces such as Cooper Black for the 'soft typography' the mascot brands pair with their characters

The colours

The ground and leading colours come from Flash Vector Cartoon, with a counter-accent from Rubber-Hose Revival. The ink reads on the ground at 4.5:1 or more.

Flash Vector Cartoon (Newgrounds-Era Web Animation) Rubber-Hose Revival (Cartoon Mascot Graphics)

#000000 ground · 36%
#ffffff ink · 14%
#ff3333 accent · 18%
#66cc33 accent · 14%
#e9b73f accent · 10%
#66ccff accent · 8%

As CSS

:root {
  --ground: #000000;
  --ink: #ffffff;
  --accent-1: #ff3333;
  --accent-2: #66cc33;
  --accent-3: #e9b73f;
  --accent-4: #66ccff;
  --font-display: "Pixelify Sans", monospace;
  --font-text: "Zen Maru Gothic", sans-serif;
}

Use it with care

Rubber-Hose Revival (Cartoon Mascot Graphics): The early cartoon look this revives is entangled with blackface minstrelsy: several sources trace the black bodies, white gloves and large white eyes of Mickey Mouse and his peers to minstrel caricature, and many 1930s shorts carried explicit racial caricature. Borrow the elastic limbs, round construction and outline, not the minstrel face; never give a character exaggerated lips, dialect or skin colour as an ethnic marker. The characters themselves (Cuphead, Bendy, Mickey, Felix, Oswald, Betty Boop) are still trademarked or copyrighted: invent your own mascot and never ask an image model for a named character or studio hand.