Does ReflowPDF support the CSS property border?

Q: Does ReflowPDF support the CSS property border?

8 of 12 examples match Chrome. matches Chrome on some values: Some of the examples match Chrome and some do not. The count beside the verdict says how many — 11 of 12 — and the values that differ are listed on the property page. It is neither a pass nor a failure, and filing it under either would be a lie in one direction. Measured against Chrome on 12 examples; the renders and the difference maps are published at https://reflowpdf.com/conformance/css/border.

Dataset 20261011-0550-f160c57 · measured 2026-10-11 05:50 UTC

border

◐matches Chrome on some values8 of 12 examples match Chromecss-borders-4

Some of the examples match Chrome and some do not. The count beside the verdict says how many — 11 of 12 — and the values that differ are listed on the property page. It is neither a pass nor a failure, and filing it under either would be a lie in one direction.

Here: 8 of 12 examples match Chrome. The 4 that do not: border:groove, border:ridge, border:inset, border:outset — shown first below, each with its difference map.

What the specification says

Initial value: see individual properties
Applies to: see individual properties
Inherited: see individual properties
Percentages: see individual properties
Computed value: see individual properties
Syntax: <line-width> || <line-style> || <color>

css-borders-4 definition

The measurements

12 examples, 8 of them matching Chrome, the rest first. Each is one declaration on a small page, drawn by Chrome and by our engine. Drag the handle to wipe between them.

border:groove✕renders differently

Chrome of this test — Left of the line is our rendering; right of it is the chrome. Drag, or focus the slider and use the arrow keys.

Our render of this test — Left of the line is our rendering; right of it is the chrome. Drag, or focus the slider and use the arrow keys.

2,532 pixels differ from Chrome, the largest by 179 of 255 on one channel.

Differing pixels: 2,532
Max channel delta: 179

the example page

border:ridge✕renders differently

2,532 pixels differ from Chrome, the largest by 159 of 255 on one channel.

Differing pixels: 2,532
Max channel delta: 159

the example page

border:inset✕renders differently

2,532 pixels differ from Chrome, the largest by 174 of 255 on one channel.

Differing pixels: 2,532
Max channel delta: 174

the example page

border:outset✕renders differently

2,532 pixels differ from Chrome, the largest by 167 of 255 on one channel.

Differing pixels: 2,532
Max channel delta: 167

the example page

border:20px✓pixel-exact