Recognised as Colour

#FF6917

#FF6917
Orange
Dark
Nearest: Orange red

#FF6917 is a orange with RGB values 255, 105, 23 and HSL 21°, 100%, 55%. It is a dark colour, so black text on it reaches 7.3:1 contrast (AAA for normal text). The nearest named colour is Orange red.

Colour values

#FF6917#FF6917

HEX#FF6917

RGBrgb(255, 105, 23)

RGB (0–1)1, 0.4118, 0.0902

RGB percentages100%, 41.2%, 9%

HSLhsl(21.2, 100%, 54.5%)

HSV / HSBhsv(21.2, 91%, 100%)

CMYK0%, 58.8%, 91%, 0%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,738,583

CSS custom property--colour: #FF6917;

Brightness & contrast

Relative luminance0.31425WCAG 2.x, 0 is black and 1 is white

Perceived brightness161.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.29:1

Contrast with white2.88:1WCAG normal text: Fail

Contrast with black7.29:1WCAG normal text: AAA

Greyscale equivalent#838383

Inverted#0096E8

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#958300no red cones; affects about 1% of men; ΔE 59.7 from the original

Deuteranopia#B9A508no green cones; the most common form, about 1% of men; ΔE 60.6 from the original

Tritanopia#FF425Bno blue cones; rare, and affects men and women equally; ΔE 41.1 from the original

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

Contrast with white, large text2.88:1WCAG large text: Fail

Contrast with black, large text7.29:1WCAG large text: AAA

Named colours

Orange red · ΔE 15 Dark orange · ΔE 20.1 Chocolate · ΔE 21 Tomato · ΔE 21.2 Coral · ΔE 21.9 Red · ΔE 27.9

Nearest named CSS colourOrange red (#FF4500)ΔE 14.97, a distinctly different colour

Hue familyorange

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#17ADFF

Analogous#FF1739, #FFDD17

Triadic#17FF69, #6917FF

Split complementary#17FFDD, #1739FF

Tetradic#39FF17, #17ADFF, #DD17FF

Tints, shades & saturation

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

Lighter +40%#FFEDE3

Lighter +30%#FFCCB0

Lighter +20%#FFAB7D

Lighter +10%#FF8A4A

Darker −10%#E35000

Darker −20%#B03E00

Darker −30%#7D2C00

Darker −40%#4A1A00

More saturated +25%#FF6917

Less saturated −25%#E27134

Channel breakdown

R255

G105

B23

Red255 (100%)

Green105 (41.2%)

Blue23 (9%)

Hue21.21°

Saturation (HSL)100%

Lightness54.51%

Dominant channelRed

Hex per channelR FF · G 69 · B 17

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FF6917 (chemical formula)

Formula
131,428.164 g/mol
6918 atoms

FF6917 has a molar mass of 131,428.164 g/mol, made up of 6918 atoms across 1 element: 6918 × F.

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Molar mass

Molar mass131,428.164 g/mol

Total atoms per molecule6918

Distinct elements1

Mass of one molecule2.182416 × 10^-19 g

Molecules per gram4.5820778 × 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

F100%

Fluorine (F × 6918)131,428.164 g/mol, 100%

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Elements in this formula

Fluorine

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