Recognised as Colour

#A4151C

#A4151C
Red
Dark
Nearest: Firebrick

#A4151C is a red with RGB values 164, 21, 28 and HSL 357°, 77%, 36%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Firebrick.

Colour values

#A4151C#A4151C

HEX#A4151C

RGBrgb(164, 21, 28)

RGB (0–1)0.6431, 0.0824, 0.1098

RGB percentages64.3%, 8.2%, 11%

HSLhsl(357.1, 77.3%, 36.3%)

HSV / HSBhsv(357.1, 87.2%, 64.3%)

CMYK0%, 87.2%, 82.9%, 35.7%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer10,753,308

CSS custom property--colour: #A4151C;

Brightness & contrast

Relative luminance0.08513WCAG 2.x, 0 is black and 1 is white

Perceived brightness91.6 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 7.77:1

Contrast with white7.77:1WCAG normal text: AAA

Contrast with black2.7:1WCAG normal text: Fail

Greyscale equivalent#343434

Inverted#5BEAE3

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#463F1Ano red cones; affects about 1% of men; ΔE 59.5 from the original

Deuteranopia#695D14no green cones; the most common form, about 1% of men; ΔE 59 from the original

Tritanopia#B5001Ano blue cones; rare, and affects men and women equally; ΔE 9.2 from the original

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

Contrast with white, large text7.77:1WCAG large text: AAA

Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Firebrick · ΔE 4.5 Brown · ΔE 7.9 Dark red · ΔE 9.5 Maroon · ΔE 11.9 Crimson · ΔE 20.2 Indian red · ΔE 25.1

Nearest named CSS colourFirebrick (#B22222)ΔE 4.52, a close match

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#15A49D

Analogous#A41564, #A45615

Triadic#1CA415, #151CA4

Split complementary#15A456, #1563A4

Tetradic#64A415, #15A49D, #5515A4

Tints, shades & saturation

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

Lighter +40%#F19498

Lighter +30%#EB676D

Lighter +20%#E63942

Lighter +10%#D11B24

Darker −10%#770F14

Darker −20%#4A090D

Darker −30%#1C0405

Darker −40%#000000

More saturated +25%#B90009

Less saturated −25%#8D2C31

Channel breakdown

R164

G21

B28

Red164 (64.3%)

Green21 (8.2%)

Blue28 (11%)

Hue357.06°

Saturation (HSL)77.3%

Lightness36.27%

Dominant channelRed

Hex per channelR A4 · G 15 · B 1C

Keep nerding

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

#A4151C

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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