Recognised as Colour

#AA311D

#AA311D
Red
Dark
Nearest: Firebrick

#AA311D is a red with RGB values 170, 49, 29 and HSL 9°, 71%, 39%. It is a dark colour, so white text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#AA311D#AA311D

HEX#AA311D

RGBrgb(170, 49, 29)

RGB (0–1)0.6667, 0.1922, 0.1137

RGB percentages66.7%, 19.2%, 11.4%

HSLhsl(8.5, 70.9%, 39%)

HSV / HSBhsv(8.5, 82.9%, 66.7%)

CMYK0%, 71.2%, 82.9%, 33.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,153,693

CSS custom property--colour: #AA311D;

Brightness & contrast

Relative luminance0.10831WCAG 2.x, 0 is black and 1 is white

Perceived brightness100.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.63:1

Contrast with white6.63:1WCAG normal text: AA

Contrast with black3.17:1WCAG normal text: Fail

Greyscale equivalent#494949

Inverted#55CEE2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#554C19no red cones; affects about 1% of men; ΔE 52.7 from the original

Deuteranopia#736617no green cones; the most common form, about 1% of men; ΔE 52.5 from the original

Tritanopia#BC002Eno blue cones; rare, and affects men and women equally; ΔE 18.4 from the original

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

Contrast with white, large text6.63:1WCAG large text: AAA

Contrast with black, large text3.17:1WCAG large text: AA

Named colours

Firebrick · ΔE 8 Brown · ΔE 9.7 Dark red · ΔE 11.6 Maroon · ΔE 13.9 Sienna · ΔE 19.9 Saddle brown · ΔE 21.9

Nearest named CSS colourFirebrick (#B22222)ΔE 8.03, clearly different but related

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#1D96AA

Analogous#AA1D50, #AA781D

Triadic#1DAA31, #311DAA

Split complementary#1DAA77, #1D50AA

Tetradic#50AA1D, #1D96AA, #771DAA

Tints, shades & saturation

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

Lighter +40%#EFAEA4

Lighter +30%#E88878

Lighter +20%#E1614C

Lighter +10%#D63E24

Darker −10%#7E2416

Darker −20%#53180E

Darker −30%#270B07

Darker −40%#000000

More saturated +25%#C31F04

Less saturated −25%#914336

Channel breakdown

R170

G49

B29

Red170 (66.7%)

Green49 (19.2%)

Blue29 (11.4%)

Hue8.51°

Saturation (HSL)70.85%

Lightness39.02%

Dominant channelRed

Hex per channelR AA · G 31 · B 1D

Keep nerding

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

#AA311D

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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