Recognised as Colour

#FB3608

#FB3608
Red
Dark
Nearest: Orange red

#FB3608 is a red with RGB values 251, 54, 8 and HSL 11°, 97%, 51%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Orange red.

Colour values

#FB3608#FB3608

HEX#FB3608

RGBrgb(251, 54, 8)

RGB (0–1)0.9843, 0.2118, 0.0314

RGB percentages98.4%, 21.2%, 3.1%

HSLhsl(11.4, 96.8%, 50.8%)

HSV / HSBhsv(11.4, 96.8%, 98.4%)

CMYK0%, 78.5%, 96.8%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,463,368

CSS custom property--colour: #FB3608;

Brightness & contrast

Relative luminance0.23165WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.63:1

Contrast with white3.73:1WCAG normal text: Fail

Contrast with black5.63:1WCAG normal text: AA

Greyscale equivalent#5D5D5D

Inverted#04C9F7

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#776800no red cones; affects about 1% of men; ΔE 77.3 from the original

Deuteranopia#A79400no green cones; the most common form, about 1% of men; ΔE 77.1 from the original

Tritanopia#FF0031no blue cones; rare, and affects men and women equally; ΔE 19.5 from the original

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

Contrast with white, large text3.73:1WCAG large text: AA

Contrast with black, large text5.63:1WCAG large text: AAA

Named colours

Orange red · ΔE 5.2 Red · ΔE 9.3 Tomato · ΔE 24.5 Crimson · ΔE 33.2 Coral · ΔE 33.8 Chocolate · ΔE 35.3

Nearest named CSS colourOrange red (#FF4500)ΔE 5.22, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#08CDFB

Analogous#FB0853, #FBB008

Triadic#08FB36, #3608FB

Split complementary#08FBAF, #0854FB

Tetradic#53FB08, #08CDFB, #AF08FB

Tints, shades & saturation

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

Lighter +40%#FED9D1

Lighter +30%#FDB19F

Lighter +20%#FD886C

Lighter +10%#FC5F3A

Darker −10%#CD2903

Darker −20%#9A1F03

Darker −30%#681502

Darker −40%#360B01

More saturated +25%#FF3404

Less saturated −25%#DC4927

Channel breakdown

R251

G54

Red251 (98.4%)

Green54 (21.2%)

Blue8 (3.1%)

Hue11.36°

Saturation (HSL)96.81%

Lightness50.78%

Dominant channelRed

Hex per channelR FB · G 36 · B 08

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB3608 (chemical formula)

Formula
39,021.478 g/mol
3609 atoms

FB3608 has a molar mass of 39,021.478 g/mol, made up of 3609 atoms across 2 elements: 1 × F, 3608 × B.

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Molar mass

Molar mass39,021.478 g/mol

Total atoms per molecule3609

Distinct elements2

Mass of one molecule6.4796689 × 10^-20 g

Molecules per gram1.5432887 × 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, 0.049%

Boron (B × 3608)39,002.48 g/mol, 99.951%

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Elements in this formula

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