Recognised as Colour

#FB5411

#FB5411
Orange
Dark
Nearest: Orange red

#FB5411 is a orange with RGB values 251, 84, 17 and HSL 17°, 97%, 53%. It is a dark colour, so black text on it reaches 6.4:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FB5411#FB5411

HEX#FB5411

RGBrgb(251, 84, 17)

RGB (0–1)0.9843, 0.3294, 0.0667

RGB percentages98.4%, 32.9%, 6.7%

HSLhsl(17.2, 96.7%, 52.5%)

HSV / HSBhsv(17.2, 93.2%, 98.4%)

CMYK0%, 66.5%, 93.2%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,471,057

CSS custom property--colour: #FB5411;

Brightness & contrast

Relative luminance0.2689WCAG 2.x, 0 is black and 1 is white

Perceived brightness151.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6.38:1

Contrast with white3.29:1WCAG normal text: Fail

Contrast with black6.38:1WCAG normal text: AA

Greyscale equivalent#737373

Inverted#04ABEE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#867600no red cones; affects about 1% of men; ΔE 67.3 from the original

Deuteranopia#AF9B00no green cones; the most common form, about 1% of men; ΔE 67.3 from the original

Tritanopia#FF154Ano blue cones; rare, and affects men and women equally; ΔE 35.7 from the original

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

Contrast with white, large text3.29:1WCAG large text: AA

Contrast with black, large text6.38:1WCAG large text: AAA

Named colours

Orange red · ΔE 7.4 Red · ΔE 19.7 Tomato · ΔE 19.9 Coral · ΔE 25.7 Chocolate · ΔE 26 Dark orange · ΔE 28.4

Nearest named CSS colourOrange red (#FF4500)ΔE 7.37, clearly different but related

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#11B8FB

Analogous#FB1143, #FBC911

Triadic#11FB54, #5411FB

Split complementary#11FBC9, #1143FB

Tetradic#43FB11, #11B8FB, #C911FB

Tints, shades & saturation

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

Lighter +40%#FEE4DA

Lighter +30%#FEC0A7

Lighter +20%#FD9C75

Lighter +10%#FC7843

Darker −10%#D54004

Darker −20%#A33103

Darker −30%#712202

Darker −40%#3F1301

More saturated +25%#FF520D

Less saturated −25%#DD612F

Channel breakdown

R251

G84

B17

Red251 (98.4%)

Green84 (32.9%)

Blue17 (6.7%)

Hue17.18°

Saturation (HSL)96.69%

Lightness52.55%

Dominant channelRed

Hex per channelR FB · G 54 · B 11

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB5411 (chemical formula)

Formula
58,511.908 g/mol
5412 atoms

FB5411 has a molar mass of 58,511.908 g/mol, made up of 5412 atoms across 2 elements: 1 × F, 5411 × B.

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Molar mass

Molar mass58,511.908 g/mol

Total atoms per molecule5412

Distinct elements2

Mass of one molecule9.7161309 × 10^-20 g

Molecules per gram1.0292163 × 10^19

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

F0%

B100%

Fluorine (F)18.998 g/mol, 0.032%

Boron (B × 5411)58,492.91 g/mol, 99.968%

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