Recognised as Colour

#AA2721

#AA2721
Red
Dark
Nearest: Firebrick

#AA2721 is a red with RGB values 170, 39, 33 and HSL 3°, 67%, 40%. It is a dark colour, so white text on it reaches 7:1 contrast (AA for normal text). The nearest named colour is Firebrick.

Colour values

#AA2721#AA2721

HEX#AA2721

RGBrgb(170, 39, 33)

RGB (0–1)0.6667, 0.1529, 0.1294

RGB percentages66.7%, 15.3%, 12.9%

HSLhsl(2.6, 67.5%, 39.8%)

HSV / HSBhsv(2.6, 80.6%, 66.7%)

CMYK0%, 77.1%, 80.6%, 33.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer11,151,137

CSS custom property--colour: #AA2721;

Brightness & contrast

Relative luminance0.10107WCAG 2.x, 0 is black and 1 is white

Perceived brightness98.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.95:1

Contrast with white6.95:1WCAG normal text: AA

Contrast with black3.02:1WCAG normal text: Fail

Greyscale equivalent#424242

Inverted#55D8DE

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#50471Fno red cones; affects about 1% of men; ΔE 55.8 from the original

Deuteranopia#70641Bno green cones; the most common form, about 1% of men; ΔE 56.3 from the original

Tritanopia#BC0027no blue cones; rare, and affects men and women equally; ΔE 12.5 from the original

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

Contrast with white, large text6.95:1WCAG large text: AAA

Contrast with black, large text3.02:1WCAG large text: AA

Named colours

Firebrick · ΔE 4.2 Brown · ΔE 6.5 Dark red · ΔE 11 Maroon · ΔE 13.2 Crimson · ΔE 21.2 Indian red · ΔE 22.3

Nearest named CSS colourFirebrick (#B22222)ΔE 4.24, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#21A4AA

Analogous#AA215F, #AA6B21

Triadic#21AA27, #2721AA

Split complementary#21AA6B, #2160AA

Tetradic#60AA21, #21A4AA, #6B21AA

Tints, shades & saturation

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

Lighter +40%#EEACA9

Lighter +30%#E6837E

Lighter +20%#DE5953

Lighter +10%#D53129

Darker −10%#7F1D19

Darker −20%#551310

Darker −30%#2A0A08

Darker −40%#000000

More saturated +25%#C31008

Less saturated −25%#913E3A

Channel breakdown

R170

G39

B33

Red170 (66.7%)

Green39 (15.3%)

Blue33 (12.9%)

Hue2.63°

Saturation (HSL)67.49%

Lightness39.8%

Dominant channelRed

Hex per channelR AA · G 27 · B 21

Keep nerding

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

#AA2721

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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