Colour

#F30009

#F30009
Red
Dark
Nearest: Red

#F30009 is a red with RGB values 243, 0, 9 and HSL 358°, 100%, 48%. It is a dark colour, so black text on it reaches 4.8:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#F30009#F30009

HEX#F30009

RGBrgb(243, 0, 9)

RGB (0–1)0.9529, 0, 0.0353

RGB percentages95.3%, 0%, 3.5%

HSLhsl(357.8, 100%, 47.6%)

HSV / HSBhsv(357.8, 100%, 95.3%)

CMYK0%, 100%, 96.3%, 4.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,925,257

CSS custom property--colour: #F30009;

Brightness & contrast

Relative luminance0.19074WCAG 2.x, 0 is black and 1 is white

Perceived brightness132.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 4.81:1

Contrast with white4.36:1WCAG normal text: Fail

Contrast with black4.81:1WCAG normal text: AA

Greyscale equivalent#343434

Inverted#0CFFF6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#675A00no red cones; affects about 1% of men; ΔE 83.6 from the original

Deuteranopia#9B8900no green cones; the most common form, about 1% of men; ΔE 82.8 from the original

Tritanopia#FF0010no blue cones; rare, and affects men and women equally; ΔE 3.9 from the original

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

Contrast with white, large text4.36:1WCAG large text: AA

Contrast with black, large text4.81:1WCAG large text: AAA

Named colours

Red · ΔE 6.1 Orange red · ΔE 13.4 Tomato · ΔE 27.7 Crimson · ΔE 29.8 Firebrick · ΔE 34.7 Coral · ΔE 38.9

Nearest named CSS colourRed (#FF0000)ΔE 6.05, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00F3EA

Analogous#F30082, #F37000

Triadic#09F300, #0009F3

Split complementary#00F370, #0082F3

Tetradic#83F300, #00F3EA, #7100F3

Tints, shades & saturation

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

Lighter +40%#FFC0C2

Lighter +30%#FF8D91

Lighter +20%#FF5A60

Lighter +10%#FF272F

Darker −10%#C00007

Darker −20%#8D0005

Darker −30%#5A0003

Darker −40%#270001

More saturated +25%#F30009

Less saturated −25%#D51E25

Channel breakdown

R243

Red243 (95.3%)

Green0 (0%)

Blue9 (3.5%)

Hue357.78°

Saturation (HSL)100%

Lightness47.65%

Dominant channelRed

Hex per channelR F3 · G 00 · B 09

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Harmonies

Lighter and darker

Similar named colours

Also reads as

F30009 (chemical formula)

Formula
570,110.982 g/mol
30009 atoms

F30009 has a molar mass of 570,110.982 g/mol, made up of 30009 atoms across 1 element: 30009 × F.

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Molar mass

Molar mass570,110.982 g/mol

Total atoms per molecule30009

Distinct elements1

Mass of one molecule9.4669156 × 10^-19 g

Molecules per gram1.0563103 × 10^18

Composition by mass

F100%

Fluorine (F × 30009)570,110.982 g/mol, 100%

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Elements in this formula

Fluorine

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