Recognised as Colour

#FB4535

#FB4535
Red
Dark
Nearest: Tomato

#FB4535 is a red with RGB values 251, 69, 53 and HSL 5°, 96%, 60%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Tomato.

Colour values

#FB4535#FB4535

HEX#FB4535

RGBrgb(251, 69, 53)

RGB (0–1)0.9843, 0.2706, 0.2078

RGB percentages98.4%, 27.1%, 20.8%

HSLhsl(4.8, 96.1%, 59.6%)

HSV / HSBhsv(4.8, 78.9%, 98.4%)

CMYK0%, 72.5%, 78.9%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,467,253

CSS custom property--colour: #FB4535;

Brightness & contrast

Relative luminance0.25023WCAG 2.x, 0 is black and 1 is white

Perceived brightness148.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 6:1

Contrast with white3.5:1WCAG normal text: Fail

Contrast with black6:1WCAG normal text: AA

Greyscale equivalent#6B6B6B

Inverted#04BACA

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#7C7031no red cones; affects about 1% of men; ΔE 73.3 from the original

Deuteranopia#A9982Cno green cones; the most common form, about 1% of men; ΔE 73.6 from the original

Tritanopia#FF0043no blue cones; rare, and affects men and women equally; ΔE 18.1 from the original

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

Contrast with white, large text3.5:1WCAG large text: AA

Contrast with black, large text6:1WCAG large text: AAA

Named colours

Tomato · ΔE 11.5 Orange red · ΔE 18.9 Crimson · ΔE 19.7 Red · ΔE 21.6 Coral · ΔE 24.4 Firebrick · ΔE 24.7

Nearest named CSS colourTomato (#FF6347)ΔE 11.46, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#35EBFB

Analogous#FB3588, #FBA835

Triadic#35FB45, #4535FB

Split complementary#35FBA8, #3588FB

Tetradic#88FB35, #35EBFB, #A835FB

Tints, shades & saturation

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

Lighter +40%#FFFDFD

Lighter +30%#FECFCB

Lighter +20%#FDA199

Lighter +10%#FC7367

Darker −10%#F81905

Darker −20%#C61404

Darker −30%#940F03

Darker −40%#620A02

More saturated +25%#FF4231

Less saturated −25%#E15B4F

Channel breakdown

R251

G69

B53

Red251 (98.4%)

Green69 (27.1%)

Blue53 (20.8%)

Hue4.85°

Saturation (HSL)96.12%

Lightness59.61%

Dominant channelRed

Hex per channelR FB · G 45 · B 35

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

FB4535 (chemical formula)

Formula
49,042.348 g/mol
4536 atoms

FB4535 has a molar mass of 49,042.348 g/mol, made up of 4536 atoms across 2 elements: 1 × F, 4535 × B.

Open this reading on its own page →

Molar mass

Molar mass49,042.348 g/mol

Total atoms per molecule4536

Distinct elements2

Mass of one molecule8.1436735 × 10^-20 g

Molecules per gram1.2279471 × 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, 0.039%

Boron (B × 4535)49,023.35 g/mol, 99.961%

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