Recognised as Colour

#FB6543

#FB6543
Red
Dark
Nearest: Tomato

#FB6543 is a red with RGB values 251, 101, 67 and HSL 11°, 96%, 62%. It is a dark colour, so black text on it reaches 7:1 contrast (AAA for normal text). The nearest named colour is Tomato.

Colour values

#FB6543#FB6543

HEX#FB6543

RGBrgb(251, 101, 67)

RGB (0–1)0.9843, 0.3961, 0.2627

RGB percentages98.4%, 39.6%, 26.3%

HSLhsl(11.1, 95.8%, 62.4%)

HSV / HSBhsv(11.1, 73.3%, 98.4%)

CMYK0%, 59.8%, 73.3%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,475,459

CSS custom property--colour: #FB6543;

Brightness & contrast

Relative luminance0.30222WCAG 2.x, 0 is black and 1 is white

Perceived brightness159.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 7.04:1

Contrast with white2.98:1WCAG normal text: Fail

Contrast with black7.04:1WCAG normal text: AAA

Greyscale equivalent#828282

Inverted#049ABC

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#8E813Fno red cones; affects about 1% of men; ΔE 61 from the original

Deuteranopia#B3A23Eno green cones; the most common form, about 1% of men; ΔE 61.5 from the original

Tritanopia#FF425Eno blue cones; rare, and affects men and women equally; ΔE 25.3 from the original

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

Contrast with white, large text2.98:1WCAG large text: Fail

Contrast with black, large text7.04:1WCAG large text: AAA

Named colours

Tomato · ΔE 2.9 Coral · ΔE 11.5 Chocolate · ΔE 21.2 Salmon · ΔE 22.1 Orange red · ΔE 24.8 Firebrick · ΔE 24.9

Nearest named CSS colourTomato (#FF6347)ΔE 2.86, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#43D9FB

Analogous#FB437D, #FBC143

Triadic#43FB65, #6543FB

Split complementary#43FBC1, #437DFB

Tetradic#7DFB43, #43D9FB, #C143FB

Tints, shades & saturation

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

Lighter +40%#FFFFFF

Lighter +30%#FEE0D9

Lighter +20%#FDB7A7

Lighter +10%#FC8E75

Darker −10%#FA3C11

Darker −20%#D32B05

Darker −30%#A22103

Darker −40%#701702

More saturated +25%#FF623F

Less saturated −25%#E3745B

Channel breakdown

R251

G101

B67

Red251 (98.4%)

Green101 (39.6%)

Blue67 (26.3%)

Hue11.09°

Saturation (HSL)95.83%

Lightness62.35%

Dominant channelRed

Hex per channelR FB · G 65 · B 43

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB6543 (chemical formula)

Formula
70,748.828 g/mol
6544 atoms

FB6543 has a molar mass of 70,748.828 g/mol, made up of 6544 atoms across 2 elements: 1 × F, 6543 × B.

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Molar mass

Molar mass70,748.828 g/mol

Total atoms per molecule6544

Distinct elements2

Mass of one molecule1.1748119 × 10^-19 g

Molecules per gram8.5120007 × 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

F0%

B100%

Fluorine (F)18.998 g/mol, 0.027%

Boron (B × 6543)70,729.83 g/mol, 99.973%

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