Recognised as Colour

#F57800

#F57800
Orange
Dark
Nearest: Dark orange

#F57800 is a orange with RGB values 245, 120, 0 and HSL 29°, 100%, 48%. It is a dark colour, so black text on it reaches 7.6:1 contrast (AAA for normal text). The nearest named colour is Dark orange.

Colour values

#F57800#F57800

HEX#F57800

RGBrgb(245, 120, 0)

RGB (0–1)0.9608, 0.4706, 0

RGB percentages96.1%, 47.1%, 0%

HSLhsl(29.4, 100%, 48%)

HSV / HSBhsv(29.4, 100%, 96.1%)

CMYK0%, 51%, 100%, 3.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,087,040

CSS custom property--colour: #F57800;

Brightness & contrast

Relative luminance0.32845WCAG 2.x, 0 is black and 1 is white

Perceived brightness162.5 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.57:1

Contrast with white2.77:1WCAG normal text: Fail

Contrast with black7.57:1WCAG normal text: AAA

Greyscale equivalent#8A8A8A

Inverted#0A87FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#9D8A00no red cones; affects about 1% of men; ΔE 49.2 from the original

Deuteranopia#BBA600no green cones; the most common form, about 1% of men; ΔE 49.3 from the original

Tritanopia#FF5A66no blue cones; rare, and affects men and women equally; ΔE 48 from the original

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

Contrast with white, large text2.77:1WCAG large text: Fail

Contrast with black, large text7.57:1WCAG large text: AAA

Named colours

Dark orange · ΔE 9.1 Chocolate · ΔE 17.8 Orange · ΔE 23.1 Coral · ΔE 24.3 Orange red · ΔE 25.8 Tomato · ΔE 29.3

Nearest named CSS colourDark orange (#FF8C00)ΔE 9.08, clearly different but related

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#007DF5

Analogous#F50002, #F5F300

Triadic#00F578, #7800F5

Split complementary#00F5F3, #0002F5

Tetradic#02F500, #007DF5, #F300F5

Tints, shades & saturation

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

Lighter +40%#FFE0C2

Lighter +30%#FFC68F

Lighter +20%#FFAC5C

Lighter +10%#FF9229

Darker −10%#C25F00

Darker −20%#8F4600

Darker −30%#5C2D00

Darker −40%#291400

More saturated +25%#F57800

Less saturated −25%#D6791F

Channel breakdown

R245

G120

Red245 (96.1%)

Green120 (47.1%)

Blue0 (0%)

Hue29.39°

Saturation (HSL)100%

Lightness48.04%

Dominant channelRed

Hex per channelR F5 · G 78 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F57800 (chemical formula)

Formula
1,098,084.4 g/mol
57800 atoms

F57800 has a molar mass of 1,098,084.4 g/mol, made up of 57800 atoms across 1 element: 57800 × F.

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Molar mass

Molar mass1,098,084.4 g/mol

Total atoms per molecule57800

Distinct elements1

Mass of one molecule1.823412 × 10^-18 g

Molecules per gram5.4842239 × 10^17

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

F100%

Fluorine (F × 57800)1,098,084.4 g/mol, 100%

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Elements in this formula

Fluorine

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