Recognised as Colour

#FB2600

#FB2600
Red
Dark
Nearest: Red

#FB2600 is a red with RGB values 251, 38, 0 and HSL 9°, 100%, 49%. It is a dark colour, so black text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#FB2600#FB2600

HEX#FB2600

RGBrgb(251, 38, 0)

RGB (0–1)0.9843, 0.149, 0

RGB percentages98.4%, 14.9%, 0%

HSLhsl(9.1, 100%, 49.2%)

HSV / HSBhsv(9.1, 100%, 98.4%)

CMYK0%, 84.9%, 100%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,459,264

CSS custom property--colour: #FB2600;

Brightness & contrast

Relative luminance0.21895WCAG 2.x, 0 is black and 1 is white

Perceived brightness140.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.38:1

Contrast with white3.9:1WCAG normal text: Fail

Contrast with black5.38:1WCAG normal text: AA

Greyscale equivalent#515151

Inverted#04D9FF

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#726300no red cones; affects about 1% of men; ΔE 81.1 from the original

Deuteranopia#A49100no green cones; the most common form, about 1% of men; ΔE 80.5 from the original

Tritanopia#FF0024no blue cones; rare, and affects men and women equally; ΔE 12.9 from the original

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

Contrast with white, large text3.9:1WCAG large text: AA

Contrast with black, large text5.38:1WCAG large text: AAA

Named colours

Red · ΔE 5.3 Orange red · ΔE 8.2 Tomato · ΔE 27.9 Crimson · ΔE 34.3 Coral · ΔE 37.7 Firebrick · ΔE 37.9

Nearest named CSS colourRed (#FF0000)ΔE 5.34, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#00D5FB

Analogous#FB0058, #FBA300

Triadic#00FB26, #2600FB

Split complementary#00FBA4, #0057FB

Tetradic#58FB00, #00D5FB, #A400FB

Tints, shades & saturation

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

Lighter +40%#FFD0C8

Lighter +30%#FFA595

Lighter +20%#FF7A62

Lighter +10%#FF4E2F

Darker −10%#C81E00

Darker −20%#951700

Darker −30%#620F00

Darker −40%#2F0700

More saturated +25%#FB2600

Less saturated −25%#DC3C1F

Channel breakdown

R251

G38

Red251 (98.4%)

Green38 (14.9%)

Blue0 (0%)

Hue9.08°

Saturation (HSL)100%

Lightness49.22%

Dominant channelRed

Hex per channelR FB · G 26 · B 00

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Harmonies

Lighter and darker

Similar named colours

Also reads as

FB2600 (chemical formula)

Formula
28,124.998 g/mol
2601 atoms

FB2600 has a molar mass of 28,124.998 g/mol, made up of 2601 atoms across 2 elements: 1 × F, 2600 × B.

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Molar mass

Molar mass28,124.998 g/mol

Total atoms per molecule2601

Distinct elements2

Mass of one molecule4.6702658 × 10^-20 g

Molecules per gram2.1412058 × 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

F0.1%

B99.9%

Fluorine (F)18.998 g/mol, 0.068%

Boron (B × 2600)28,106 g/mol, 99.932%

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Elements in this formula

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