Recognised as Colour

#F81B09

#F81B09
Red
Dark
Nearest: Red

#F81B09 is a red with RGB values 248, 27, 9 and HSL 5°, 94%, 50%. It is a dark colour, so black text on it reaches 5.2:1 contrast (AA for normal text). The nearest named colour is Red.

Colour values

#F81B09#F81B09

HEX#F81B09

RGBrgb(248, 27, 9)

RGB (0–1)0.9725, 0.1059, 0.0353

RGB percentages97.3%, 10.6%, 3.5%

HSLhsl(4.5, 94.5%, 50.4%)

HSV / HSBhsv(4.5, 96.4%, 97.3%)

CMYK0%, 89.1%, 96.4%, 2.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer16,259,849

CSS custom property--colour: #F81B09;

Brightness & contrast

Relative luminance0.2076WCAG 2.x, 0 is black and 1 is white

Perceived brightness137.2 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundBlackcontrast 5.15:1

Contrast with white4.08:1WCAG normal text: Fail

Contrast with black5.15:1WCAG normal text: AA

Greyscale equivalent#494949

Inverted#07E4F6

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#6D6000no red cones; affects about 1% of men; ΔE 82.6 from the original

Deuteranopia#A08E00no green cones; the most common form, about 1% of men; ΔE 81.9 from the original

Tritanopia#FF001Eno blue cones; rare, and affects men and women equally; ΔE 7.4 from the original

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

Contrast with white, large text4.08:1WCAG large text: AA

Contrast with black, large text5.15:1WCAG large text: AAA

Named colours

Red · ΔE 5.3 Orange red · ΔE 10.8 Tomato · ΔE 26.9 Crimson · ΔE 31.3 Firebrick · ΔE 35.7 Coral · ΔE 37.7

Nearest named CSS colourRed (#FF0000)ΔE 5.31, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#09E6F8

Analogous#F8096E, #F89209

Triadic#09F81B, #1B09F8

Split complementary#09F893, #096EF8

Tetradic#6FF809, #09E6F8, #9309F8

Tints, shades & saturation

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

Lighter +40%#FED3CF

Lighter +30%#FCA59E

Lighter +20%#FB776C

Lighter +10%#F9493B

Darker −10%#C81406

Darker −20%#970F04

Darker −30%#650A03

Darker −40%#340501

More saturated +25%#FF1502

Less saturated −25%#D83629

Channel breakdown

R248

G27

Red248 (97.3%)

Green27 (10.6%)

Blue9 (3.5%)

Hue4.52°

Saturation (HSL)94.47%

Lightness50.39%

Dominant channelRed

Hex per channelR F8 · G 1B · B 09

Keep nerding

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

#F81B09

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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