Used and loved by millions
Since I tried Ludwig back in 2017, I have been constantly using it in both editing and translation. Ever since, I suggest it to my translators at ProSciEditing.

Justyna Jupowicz-Kozak
CEO of Professional Science Editing for Scientists @ prosciediting.com
black as red
Grammar usage guide and real-world examplesUSAGE SUMMARY
The phrase "black as red" is not correct and does not convey a clear meaning in written English.
It is not a commonly used expression and may confuse readers due to the contradictory nature of the colors. Example: "The sky was black as red during the sunset, creating a surreal atmosphere."
⚠ May contain grammatical issues
Science
News & Media
Wiki
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Human-verified examples from authoritative sources
Exact Expressions
1 human-written examples
(a) Responsivity (experimental) spectra for BS (black), AS (red) photodetectors.
Science
Human-verified similar examples from authoritative sources
Similar Expressions
58 human-written examples
The experimental optical spectra of BS (black) and AS (red) embedded in PDMS: (d) transmittance, (e) reflectance, and (f) absorptance.
Science
Will, with his baffling metaphors, is amusing and has the best joke of the night: "I tell you, I'm black" (as opposed to red, or white, which is what Rita thinks he is).
News & Media
She tries on multiple lipsticks (bright pink, classic red, dark black) as well as multiple personalities: a confident and sex-aggressive femme, a casual party girl ready for shots, and (most inexplicably but hilariously), a woman with a British accent.
News & Media
Also, yellow is apparently the new black as well, because the new Touch comes in yellow, as well as blue, black and red.
News & Media
General Kimmitt told reporters that none of the routes in Iraq were now classified by the military as "black" or "red," meaning too dangerous to use.
News & Media
HER2 gene and chromosome 17 single copies were visualized as black dots and as red dots, respectively.
Science
There is a white rectangle above a black, and black above white, as well as black above red, blue, yellow or green.
News & Media
You can't wrong with short(or long if you like) nails that are painted a dark color such as black, red of any kind, plum, purples, and dark blues.
Wiki
For the dress code use a kimono dress code for your Hello kitty and decorate and paint it with black and dark colors such as red.
Wiki
It follows that the library contains as many red books as the total books in its collection, and as many red books as black books, and as many red books as red and black books combined.
Science
Expert writing Tips
Best practice
If you need to use "black as red", consider rephrasing to something more conventional like "dark red" or use it intentionally for artistic purposes to convey a sense of paradox or surrealism.
Common error
Unless you're aiming for deliberate ambiguity or surrealism, avoid using "black as red" as it is not a standard English expression and can confuse readers. Opt for clearer descriptions such as "dark red" or "reddish-black".
Source & Trust
76%
Authority and reliability
2.2/5
Expert rating
Real-world application tested
Linguistic Context
The phrase "black as red" primarily functions as a descriptive element, although its contradictory nature makes it unusual. Ludwig AI reports this is not a correct phrase. It is most likely used to create a sense of paradox or surrealism in creative contexts.
Frequent in
Science
33%
News & Media
33%
Wiki
33%
Less common in
Formal & Business
0%
Reference
0%
Encyclopedias
0%
Ludwig's WRAP-UP
In summary, while the phrase "black as red" might appear in various sources, Ludwig AI states that it's not a grammatically correct or commonly accepted expression. Its contradictory nature means it is best reserved for creative writing, where paradox or unusual imagery is desired. In most other contexts, it's better to use more conventional and clear descriptions such as "dark red" or "reddish-black" to avoid confusing your audience. Overall, use this expression with caution.
More alternative expressions(10)
Phrases that express similar concepts, ordered by semantic similarity:
reddish-black
Describes a color that is a mix of red and black, focusing on the resulting hue.
dark red
Specifies a shade of red that is closer to black in terms of darkness.
crimson as night
Uses a simile to compare the redness to the darkness of night, emphasizing the intensity of the red.
ebony red
Contrasts the darkness of ebony with the color red, highlighting the unusual combination.
a paradox of color
Refers to the phrase as a contradiction in terms.
an impossible hue
Highlights the unrealistic or imaginary nature of the color combination.
the color of a contradiction
Emphasizes the conflicting nature of the description.
as opposite as colors can be
Highlights the contrast between colors in general.
where black meets red
Focuses on the interaction or blending of black and red.
black tinged with red
Describes black with subtle red highlights.
FAQs
Is "black as red" grammatically correct?
The phrase "black as red" is not a standard or commonly accepted expression in English. It is considered grammatically questionable as it creates a contradictory image. It might be used in a creative or artistic context to suggest something paradoxical, but it's generally best to avoid it in formal writing.
What does "black as red" mean?
The phrase "black as red" doesn't have a standard meaning. It is often interpreted as a paradoxical or surreal expression, possibly referring to a very dark shade of red or a situation where colors are unexpectedly combined. Its interpretation is highly dependent on context.
What can I say instead of "black as red"?
Depending on the intended meaning, you could use phrases like "dark red", "reddish-black", or even a more descriptive phrase like "a shade of red so deep it almost appears black".
In what contexts might "black as red" be appropriate?
The phrase "black as red" might be appropriate in artistic writing, poetry, or contexts where the intention is to create a sense of surrealism, paradox, or unusual imagery. It should be used cautiously in more formal or technical writing where clarity is paramount.
Editing plus AI, all in one place.
Stop switching between tools. Your AI writing partner for everything—polishing proposals, crafting emails, finding the right tone.
Table of contents
Usage summary
Human-verified examples
Expert writing tips
Linguistic context
Ludwig's wrap-up
Alternative expressions
FAQs
Source & Trust
76%
Authority and reliability
2.2/5
Expert rating
Real-world application tested