Recognised as Colour

#B23827

#B23827
Red
Dark
Nearest: Firebrick

#B23827 is a red with RGB values 178, 56, 39 and HSL 7°, 64%, 43%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#B23827#B23827

HEX#B23827

RGBrgb(178, 56, 39)

RGB (0–1)0.698, 0.2196, 0.1529

RGB percentages69.8%, 22%, 15.3%

HSLhsl(7.3, 64.1%, 42.5%)

HSV / HSBhsv(7.3, 78.1%, 69.8%)

CMYK0%, 68.5%, 78.1%, 30.2%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,679,783

CSS custom property--colour: #B23827;

Brightness & contrast

Relative luminance0.1244WCAG 2.x, 0 is black and 1 is white

Perceived brightness107.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.02:1

Contrast with white6.02:1WCAG normal text: AA

Contrast with black3.49:1WCAG normal text: Fail

Greyscale equivalent#515151

Inverted#4DC7D8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#5B5224no red cones; affects about 1% of men; ΔE 52.9 from the original

Deuteranopia#7A6D22no green cones; the most common form, about 1% of men; ΔE 52.9 from the original

Tritanopia#C40F35no blue cones; rare, and affects men and women equally; ΔE 18.3 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text6.02:1WCAG large text: AAA

Contrast with black, large text3.49:1WCAG large text: AA

Named colours

Firebrick · ΔE 7.9 Brown · ΔE 8.5 Dark red · ΔE 14.5 Maroon · ΔE 16.4 Sienna · ΔE 19.4 Indian red · ΔE 19.7

Nearest named CSS colourFirebrick (#B22222)ΔE 7.94, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#27A1B2

Analogous#B2275B, #B27D27

Triadic#27B238, #3827B2

Split complementary#27B27D, #275CB2

Tetradic#5CB227, #27A1B2, #7E27B2

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#EFBDB6

Lighter +30%#E6978C

Lighter +20%#DD7162

Lighter +10%#D44B38

Darker −10%#882B1E

Darker −20%#5E1E15

Darker −30%#34110C

Darker −40%#0B0302

More saturated +25%#CD240C

Less saturated −25%#974C42

Channel breakdown

R178

G56

B39

Red178 (69.8%)

Green56 (22%)

Blue39 (15.3%)

Hue7.34°

Saturation (HSL)64.06%

Lightness42.55%

Dominant channelRed

Hex per channelR B2 · G 38 · B 27

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Harmonies

Lighter and darker

Similar named colours

Also reads as

B23827 (chemical formula)

Formula
257,569.87 g/mol
23827 atoms

B23827 has a molar mass of 257,569.87 g/mol, made up of 23827 atoms across 1 element: 23827 × B.

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Molar mass

Molar mass257,569.87 g/mol

Total atoms per molecule23827

Distinct elements1

Mass of one molecule4.2770483 × 10^-19 g

Molecules per gram2.338061 × 10^18

Name

NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show

Composition by mass

B100%

Boron (B × 23827)257,569.87 g/mol, 100%

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Elements in this formula

Boron

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