Home: go to the homepage U+1F300 to U+1F5FF Miscellaneous Symbols and Pictographs
Glyph for U+1F505
Source: Noto Emoji

U+1F505 Low Brightness Symbol

U+1F505 was added to Unicode in version 6.0 (2010). It belongs to the block U+1F300 to U+1F5FF Miscellaneous Symbols and Pictographs in the U+10000 to U+1FFFF Supplementary Multilingual Plane.

This character is a Other Symbol and is commonly used, that is, in no specific script.

The glyph is not a composition. It has a Wide East Asian Width. In bidirectional context it acts as Other Neutral and is not mirrored. In text U+1F505 behaves as Alphabetic regarding line breaks. It has type Other for sentence and Other for word breaks. The Grapheme Cluster Break is Any.

The CLDR project labels this character “dim button” for use in screen reading software. It assigns additional tags, e.g. for search in emoji pickers: brightness, dim, low.

This character is designated as an emoji. It will be rendered as colorful emoji on conforming platforms. To reduce it to a monochrome character, you can combine it with Glyph for U+FE0E Variation Selector-15: 🔅︎ See the Emojipedia for more details on this character’s emoji properties.

The Wikipedia has the following information about this codepoint:

Brightness is an attribute of visual perception in which a source appears to be radiating or reflecting light. In other words, brightness is the perception elicited by the luminance of a visual target. The perception is not linear to luminance, and relies on the context of the viewing environment (for example, see White's illusion).

Brightness is a subjective sensation of an object being observed and one of the color appearance parameters of many color appearance models, typically denoted as Q {displaystyle Q} . Brightness refers to how much light appears to shine from something. This is a different perception than lightness, which is how light something appears compared to a similarly lit white object.

The adjective bright derives from an Old English beorht with the same meaning via metathesis giving Middle English briht. The word is from a Common Germanic *berhtaz, ultimately from a PIE root with a closely related meaning, *bhereg- "white, bright". "Brightness" was formerly used as a synonym for the photometric term luminance and (incorrectly) for the radiometric term radiance. As defined by the US Federal Glossary of Telecommunication Terms (FS-1037C), "brightness" should now be used only for non-quantitative references to physiological sensations and perceptions of light. Brightness is an antonym of "dimness" or "dullness".

With regard to stars, brightness is quantified as apparent magnitude and absolute magnitude.

The United States Federal Trade Commission (FTC) has assigned an unconventional meaning to brightness when applied to lamps. When appearing on light bulb packages, brightness means luminous flux, while in other contexts it means luminance. Luminous flux is the total amount of light coming from a source, such as a lighting device. Luminance, the original meaning of brightness, is the amount of light per solid angle coming from an area, such as the sky. The table below shows the standard ways of indicating the amount of light.

Representations

System Representation
128261
UTF-8 F0 9F 94 85
UTF-16 D8 3D DD 05
UTF-32 00 01 F5 05
URL-Quoted %F0%9F%94%85
HTML hex reference 🔅
Wrong windows-1252 Mojibake 🔅

Elsewhere

Complete Record

Property Value
Age 6.0 (2010)
Unicode Name LOW BRIGHTNESS SYMBOL
Unicode 1 Name
Block Miscellaneous Symbols and Arrows
General Category Other Symbol
Script Common
Bidirectional Category Other Neutral
Combining Class Not Reordered
Decomposition Type None
Decomposition Mapping Glyph for U+1F505 Low Brightness Symbol
Lowercase
Simple Lowercase Mapping Glyph for U+1F505 Low Brightness Symbol
Lowercase Mapping Glyph for U+1F505 Low Brightness Symbol
Uppercase
Simple Uppercase Mapping Glyph for U+1F505 Low Brightness Symbol
Uppercase Mapping Glyph for U+1F505 Low Brightness Symbol
Simple Titlecase Mapping Glyph for U+1F505 Low Brightness Symbol
Titlecase Mapping Glyph for U+1F505 Low Brightness Symbol
Case Folding Glyph for U+1F505 Low Brightness Symbol
ASCII Hex Digit
Alphabetic
Bidi Control
Bidi Mirrored
Composition Exclusion
Case Ignorable
Changes When Casefolded
Changes When Casemapped
Changes When NFKC Casefolded
Changes When Lowercased
Changes When Titlecased
Changes When Uppercased
Cased
Full Composition Exclusion
Default Ignorable Code Point
Dash
Deprecated
Diacritic
Emoji Modifier Base
Emoji Component
Emoji Modifier
Emoji Presentation
Emoji
Extender
Extended Pictographic
FC NFKC Closure Glyph for U+1F505 Low Brightness Symbol
Grapheme Cluster Break Any
Grapheme Base
Grapheme Extend
Grapheme Link
Hex Digit
Hyphen
ID Continue
ID Start
IDS Binary Operator
IDS Trinary Operator and
IDSU 0
ID_Compat_Math_Continue 0
ID_Compat_Math_Start 0
Ideographic
InCB None
Indic Mantra Category
Indic Positional Category NA
Indic Syllabic Category Other
Jamo Short Name
Join Control
Logical Order Exception
Math
Noncharacter Code Point
NFC Quick Check Yes
NFD Quick Check Yes
NFKC Casefold Glyph for U+1F505 Low Brightness Symbol
NFKC Quick Check Yes
NFKC_SCF Glyph for U+1F505 Low Brightness Symbol
NFKD Quick Check Yes
Other Alphabetic
Other Default Ignorable Code Point
Other Grapheme Extend
Other ID Continue
Other ID Start
Other Lowercase
Other Math
Other Uppercase
Prepended Concatenation Mark
Pattern Syntax
Pattern White Space
Quotation Mark
Regional Indicator
Radical
Sentence Break Other
Soft Dotted
Sentence Terminal
Terminal Punctuation
Unified Ideograph
Variation Selector
Word Break Other
White Space
XID Continue
XID Start
Expands On NFC
Expands On NFD
Expands On NFKC
Expands On NFKD
Bidi Paired Bracket Glyph for U+1F505 Low Brightness Symbol
Bidi Paired Bracket Type None
East Asian Width Wide
Hangul Syllable Type Not Applicable
ISO 10646 Comment
Joining Group No_Joining_Group
Joining Type Non Joining
Line Break Alphabetic
Numeric Type None
Numeric Value not a number
Simple Case Folding Glyph for U+1F505 Low Brightness Symbol
Script Extension
Vertical Orientation U