| Royal blue (traditional) | |
|---|---|
 Color coordinates | |
| Hex triplet | #002366 |
| sRGBB (r,g,b) | (0, 35, 102) |
| HSV (h,s,v) | (219°, 100%, 40%) |
| CIELChuv (L,C,h) | (16, 44, 260°) |
| Source | The Mother of All HTML Colo(u)r Charts[1] |
| ISCC–NBS descriptor | Deep blue |
| B: Normalized to [0–255] (byte) | |
| Royal blue (web color) | |
|---|---|
| Color coordinates | |
| Hex triplet | #4169E1 |
| sRGBB (r,g,b) | (65, 105, 225) |
| HSV (h,s,v) | (225°, 71%, 88%) |
| CIELChuv (L,C,h) | (48, 103, 260°) |
| Source | X11 |
| ISCC–NBS descriptor | Vivid blue |
| B: Normalized to [0–255] (byte) | |
| Royal blue (Pantone) | |
|---|---|
| Color coordinates | |
| Hex triplet | #3D428B |
| sRGBB (r,g,b) | (61, 66, 139) |
| HSV (h,s,v) | (236°, 56%, 55%) |
| CIELChuv (L,C,h) | (31, 58, 264°) |
| Source | Pantone[2] |
| ISCC–NBS descriptor | Deep purplish blue |
| B: Normalized to [0–255] (byte) | |
Royal blue is a deep and vivid shade ofblue. It is said to have been created by a consortium of mills inRode, Somerset, which won a competition to make a robe forQueen Charlotte, consort ofKing George III. In winning the prize, a business in the village invented the dye and received a certificate to sell it under that name.[3]
TheOxford English Dictionary defines "royal blue" as "a deep vivid blue",[4] while theCambridge English Dictionary defined it as "a strong, bright blue colour",[5] and theCollins English Dictionary defines it as "a deep blue colour".[6] US dictionaries give it as further towards purple, e.g. "a deep, vivid reddish or purplish blue" (Webster's New World College Dictionary)[7] or "a vivid purplish blue" (Merriam-Webster).[8]
By the 1950s, many people[who?] began to think of royal blue as a brighter color, and it is this brighter color that was chosen as theweb color "royal blue" (the web colors when they were formulated in 1987 were originally known as theX11 colors). TheWorld Wide Web Consortium designated the keyword "royalblue" to be this much brighter color, rather than the traditional darker version of royal blue.
Cree Inc. uses the term Royal Blue to describelight emitting diodes in the wavelength range 450–465nanometers, slightly shorter than the regular blue range of 465–485 nanometers.[9]
| Queen blue | |
|---|---|
| Color coordinates | |
| Hex triplet | #436B95 |
| sRGBB (r,g,b) | (67, 107, 149) |
| HSV (h,s,v) | (211°, 55%, 58%) |
| CIELChuv (L,C,h) | (44, 43, 245°) |
| Source | ISCC-NBS[10] |
| ISCC–NBS descriptor | Moderate blue |
| B: Normalized to [0–255] (byte) | |
Queen blue is a medium tone of royal blue.
The first recorded use ofqueen blue as a color name inEnglish was in 1926. Before that, since 1661, this color had been calledqueen's blue.[11]
| Imperial blue | |
|---|---|
| Color coordinates | |
| Hex triplet | #005A92 |
| sRGBB (r,g,b) | (0, 90, 146) |
| HSV (h,s,v) | (203°, 100%, 57%) |
| CIELChuv (L,C,h) | (37, 57, 247°) |
| Source | Pantone[12] |
| ISCC–NBS descriptor | Moderate blue |
| B: Normalized to [0–255] (byte) | |
Imperial blue is recorded as an alternative name for the traditional royal blue color above.[1] The name is also used for a distinct, medium blue color by Pantone.