Recognised as Colour

#FB3753

#FB3753
Red
Dark
Nearest: Crimson

#FB3753 is a red with RGB values 251, 55, 83 and HSL 351°, 96%, 60%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Crimson.

Colour values

#FB3753#FB3753

HEX#FB3753

RGBrgb(251, 55, 83)

RGB (0–1)0.9843, 0.2157, 0.3255

RGB percentages98.4%, 21.6%, 32.5%

HSLhsl(351.4, 96.1%, 60%)

HSV / HSBhsv(351.4, 78.1%, 98.4%)

CMYK0%, 78.1%, 66.9%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,463,699

CSS custom property--colour: #FB3753;

Brightness & contrast

Relative luminance0.23866WCAG 2.x, 0 is black and 1 is white

Perceived brightness146.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.77:1

Contrast with white3.64:1WCAG normal text: Fail

Contrast with black5.77:1WCAG normal text: AA

Greyscale equivalent#636363

Inverted#04C8AC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726C52no red cones; affects about 1% of men; ΔE 77.6 from the original

Deuteranopia#A3954Dno green cones; the most common form, about 1% of men; ΔE 77.9 from the original

Tritanopia#FF0044no blue cones; rare, and affects men and women equally; ΔE 10.8 from the original

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

Contrast with white, large text3.64:1WCAG large text: AA

Contrast with black, large text5.77:1WCAG large text: AAA

Named colours

Crimson · ΔE 9.2 Tomato · ΔE 21.5 Firebrick · ΔE 24.5 Brown · ΔE 29.6 Indian red · ΔE 29.9 Salmon · ΔE 30

Nearest named CSS colourCrimson (#DC143C)ΔE 9.22, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#37FBDF

Analogous#FB37B5, #FB7D37

Triadic#53FB37, #3753FB

Split complementary#37FB7D, #37B5FB

Tetradic#B5FB37, #37FBDF, #7D37FB

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FECDD4

Lighter +20%#FD9BA9

Lighter +10%#FC697E

Darker −10%#FA0528

Darker −20%#C80420

Darker −30%#960318

Darker −40%#640210

More saturated +25%#FF3350

Less saturated −25%#E25165

Channel breakdown

R251

G55

B83

Red251 (98.4%)

Green55 (21.6%)

Blue83 (32.5%)

Hue351.43°

Saturation (HSL)96.08%

Lightness60%

Dominant channelRed

Hex per channelR FB · G 37 · B 53

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

FB3753 (chemical formula)

Formula
40,588.928 g/mol
3754 atoms

FB3753 has a molar mass of 40,588.928 g/mol, made up of 3754 atoms across 2 elements: 1 × F, 3753 × B.

Open this reading on its own page →

Molar mass

Molar mass40,588.928 g/mol

Total atoms per molecule3754

Distinct elements2

Mass of one molecule6.7399501 × 10^-20 g

Molecules per gram1.4836905 × 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, 0.047%

Boron (B × 3753)40,569.93 g/mol, 99.953%

Keep nerding

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

Elements in this formula

Nerdulate something else

Nothing in mind? Surprise me · today’s page