Recognised as Colour

#FF5B27

#FF5B27
Red
Dark
Nearest: Orange red

#FF5B27 is a red with RGB values 255, 91, 39 and HSL 14°, 100%, 58%. It is a dark colour, so black text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FF5B27#FF5B27

HEX#FF5B27

RGBrgb(255, 91, 39)

RGB (0–1)1, 0.3569, 0.1529

RGB percentages100%, 35.7%, 15.3%

HSLhsl(14.4, 100%, 57.6%)

HSV / HSBhsv(14.4, 84.7%, 100%)

CMYK0%, 64.3%, 84.7%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,735,015

CSS custom property--colour: #FF5B27;

Brightness & contrast

Relative luminance0.28889WCAG 2.x, 0 is black and 1 is white

Perceived brightness156.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.78:1

Contrast with white3.1:1WCAG normal text: Fail

Contrast with black6.78:1WCAG normal text: AA

Greyscale equivalent#7A7A7A

Inverted#00A4D8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#8B7B1Dno red cones; affects about 1% of men; ΔE 65.9 from the original

Deuteranopia#B3A01Dno green cones; the most common form, about 1% of men; ΔE 66.6 from the original

Tritanopia#FF2951no blue cones; rare, and affects men and women equally; ΔE 32.3 from the original

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

Contrast with white, large text3.1:1WCAG large text: AA

Contrast with black, large text6.78:1WCAG large text: AAA

Named colours

Orange red · ΔE 12.1 Tomato · ΔE 13.9 Coral · ΔE 20.5 Red · ΔE 22.4 Chocolate · ΔE 23.8 Dark orange · ΔE 29.3

Nearest named CSS colourOrange red (#FF4500)ΔE 12.1, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#27CBFF

Analogous#FF275F, #FFC727

Triadic#27FF5B, #5B27FF

Split complementary#27FFC7, #275FFF

Tetradic#5FFF27, #27CBFF, #C727FF

Tints, shades & saturation

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

Lighter +40%#FFF6F3

Lighter +30%#FFCFC0

Lighter +20%#FFA88D

Lighter +10%#FF825A

Darker −10%#F33B00

Darker −20%#C02E00

Darker −30%#8D2200

Darker −40%#5A1600

More saturated +25%#FF5B27

Less saturated −25%#E46942

Channel breakdown

R255

G91

B39

Red255 (100%)

Green91 (35.7%)

Blue39 (15.3%)

Hue14.44°

Saturation (HSL)100%

Lightness57.65%

Dominant channelRed

Hex per channelR FF · G 5B · B 27

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF5B27 (chemical formula)

Formula
405.858 g/mol
33 atoms

FF5B27 has a molar mass of 405.858 g/mol, made up of 33 atoms across 2 elements: 6 × F, 27 × B.

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Molar mass

Molar mass405.858 g/mol

Total atoms per molecule33

Distinct elements2

Mass of one molecule6.7394306 × 10^-22 g

Molecules per gram1.4838049 × 10^21

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

F28.1%

B71.9%

Fluorine (F × 6)113.988 g/mol, 28.086%

Boron (B × 27)291.87 g/mol, 71.914%

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