royal blue
royal blue — noun
1. a vivid blue hue that sits between navy and sky blue on the spectrum — it names
a vivid blue hue that sits between navy and sky blue on the spectrum — it names the colour itself, not a description of something coloured blue.
Cyrus chose royal blue for the living room walls because the colour feels calm and welcoming.
uncountable noun: royal blue + singular verb
The bride's bridesmaids all wore matching dresses in a deep shade of royal blue.
Royal blue looks especially striking when paired with gold or cream accents in a logo.
Iris mixed white into the royal blue to soften the colour for the sky in her painting.
- sapphire blue
a slightly darker blue with a gem-like quality, often associated with sapphires
- ultramarine
a deeper, more intense blue made from a natural pigment; more formal or artistic in register
- cobalt blue
a similar bright blue, but slightly greener in tone and derived from a specific mineral pigment
文法句型
royal blue + verb (is/appears)
a shade of royal blue
painted in royal blue
用法筆記
Royal blue is an uncountable noun — you do not say 'a royal blue' when referring to the colour as a concept. Use 'a shade of royal blue' or 'a royal blue [something]' if you need an article.
常見錯誤
royal blue — adjective
1. describes an object, piece of clothing, or surface as having the vivid blue appe
describes an object, piece of clothing, or surface as having the vivid blue appearance that the word royal blue names.
Stefan wore a royal blue blazer to the conference and received several compliments.
attributive use: royal blue + noun (blazer)
The kitchen cabinets were painted a cheerful royal blue that reminded Adina of the seaside.
A royal blue blanket lay folded at the foot of the guest bed.
The team's royal blue jerseys have become a beloved symbol of the city.
- sapphire
used as an adjective for a slightly darker, more gem-like blue; 'a sapphire dress'
- ultramarine
a deeper, more intense blue; more often used in art contexts
文法句型
royal blue + noun
be royal blue
用法筆記
This adjective is mainly used attributively (before a noun) as in 'a royal blue dress.' It can also appear after linking verbs: 'The car is royal blue.' It is not gradable — you cannot say 'more royal blue' or 'very royal blue.'
常見錯誤
royal blue — phrase
1. a standardized named colour category with a distinct purplish-blue hue, used as
a standardized named colour category with a distinct purplish-blue hue, used as a fixed colour reference in national flags, military dress uniforms, corporate brand systems, and royal heraldry — the phrase identifies a specific registered shade name, not a general description of anything that appears bright blue.
The national flag uses royal blue as the official background for its coat of arms.
heraldic context: official named shade on a national flag
Tendai consulted the interior design guide for the palace, which specifies royal blue for all state dining rooms.
formal design specification: official named shade in interior design
The royal guards wear ceremonial dress uniforms that are trimmed in royal blue silk braid.
Diya studied the china pattern at the museum, noting the royal blue border that matches the palace registry.
- king's blue
an older historical term for a similar shade used in royal heraldry; less common today
- purplish blue
a descriptive phrase rather than a named shade; less precise
文法句型
royal blue as a colour name
known as royal blue
用法筆記
This phrase entry treats 'royal blue' as a fixed colour-category name with a standard reference hue (purplish-blue), used in official colour systems such as flags, uniforms, and brand palettes. It differs from the noun sense (寶藍色), which describes the general bright-blue colour as a visual phenomenon rather than a named category with a fixed standard reference.