Recognised as Colour

#F33F45

#F33F45
Red
Dark
Nearest: Crimson

#F33F45 is a red with RGB values 243, 63, 69 and HSL 358°, 88%, 60%. It is a dark colour, so black text on it reaches 5.6:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#F33F45#F33F45

HEX#F33F45

RGBrgb(243, 63, 69)

RGB (0–1)0.9529, 0.2471, 0.2706

RGB percentages95.3%, 24.7%, 27.1%

HSLhsl(358, 88.2%, 60%)

HSV / HSBhsv(358, 74.1%, 95.3%)

CMYK0%, 74.1%, 71.6%, 4.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer15,941,445

CSS custom property--colour: #F33F45;

Brightness & contrast

Relative luminance0.23039WCAG 2.x, 0 is black and 1 is white

Perceived brightness143.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.61:1

Contrast with white3.74:1WCAG normal text: Fail

Contrast with black5.61:1WCAG normal text: AA

Greyscale equivalent#666666

Inverted#0CC0BA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#756B43no red cones; affects about 1% of men; ΔE 72.2 from the original

Deuteranopia#A1923Fno green cones; the most common form, about 1% of men; ΔE 73 from the original

Tritanopia#FF0043no blue cones; rare, and affects men and women equally; ΔE 13.8 from the original

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

Contrast with white, large text3.74:1WCAG large text: AA

Contrast with black, large text5.61:1WCAG large text: AAA

Named colours

Crimson · ΔE 10.2 Tomato · ΔE 14.2 Firebrick · ΔE 19.8 Brown · ΔE 26.5 Coral · ΔE 26.8 Salmon · ΔE 27.3

Nearest named CSS colourCrimson (#DC143C)ΔE 10.24, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#3FF3ED

Analogous#F33F9F, #F3933F

Triadic#45F33F, #3F45F3

Split complementary#3FF393, #3F9FF3

Tetradic#9FF33F, #3FF3ED, #933FF3

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FCCFD1

Lighter +20%#F99FA2

Lighter +10%#F66F73

Darker −10%#F00F16

Darker −20%#C00C12

Darker −30%#90090D

Darker −40%#600609

More saturated +25%#FF333A

Less saturated −25%#D9595D

Channel breakdown

R243

G63

B69

Red243 (95.3%)

Green63 (24.7%)

Blue69 (27.1%)

Hue358°

Saturation (HSL)88.24%

Lightness60%

Dominant channelRed

Hex per channelR F3 · G 3F · B 45

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Harmonies

Lighter and darker

Similar named colours

Also reads as

F33F45 (chemical formula)

Formula
1,481.844 g/mol
78 atoms

F33F45 has a molar mass of 1,481.844 g/mol, made up of 78 atoms across 1 element: 78 × F.

Open this reading on its own page →

Molar mass

Molar mass1,481.844 g/mol

Total atoms per molecule78

Distinct elements1

Mass of one molecule2.4606599 × 10^-21 g

Molecules per gram4.0639506 × 10^20

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 × 78)1,481.844 g/mol, 100%

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Elements in this formula

Fluorine

Nerdulate something else

Nothing in mind? Surprise me · today’s page