Recognised as Colour

#40180D

#40180D
Red
Dark
Nearest: Black

#40180D is a red with RGB values 64, 24, 13 and HSL 13°, 66%, 15%. It is a dark colour, so white text on it reaches 15.5:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#40180D#40180D

HEX#40180D

RGBrgb(64, 24, 13)

RGB (0–1)0.251, 0.0941, 0.051

RGB percentages25.1%, 9.4%, 5.1%

HSLhsl(12.9, 66.2%, 15.1%)

HSV / HSBhsv(12.9, 79.7%, 25.1%)

CMYK0%, 62.5%, 79.7%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,200,461

CSS custom property--colour: #40180D;

Brightness & contrast

Relative luminance0.01772WCAG 2.x, 0 is black and 1 is white

Perceived brightness39.8 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.5:1

Contrast with white15.5:1WCAG normal text: AAA

Contrast with black1.35:1WCAG normal text: Fail

Greyscale equivalent#202020

Inverted#BFE7F2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#231F0Cno red cones; affects about 1% of men; ΔE 20.6 from the original

Deuteranopia#2D270Cno green cones; the most common form, about 1% of men; ΔE 20.2 from the original

Tritanopia#471016no blue cones; rare, and affects men and women equally; ΔE 9.4 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text15.5:1WCAG large text: AAA

Contrast with black, large text1.35:1WCAG large text: Fail

Named colours

Black · ΔE 28.4 Saddle brown · ΔE 34.9 Sienna · ΔE 37 Maroon · ΔE 38.4 Dim grey · ΔE 38.9 Dark slate grey · ΔE 40

Nearest named CSS colourBlack (#000000)ΔE 28.44, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0D3540

Analogous#400D1B, #40310D

Triadic#0D4018, #180D40

Split complementary#0D4032, #0D1B40

Tetradic#1C400D, #0D3540, #320D40

Tints, shades & saturation

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

Lighter +40%#D86141

Lighter +30%#BF4827

Lighter +20%#95381E

Lighter +10%#6A2816

Darker −10%#160804

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#4A1303

Less saturated −25%#361D17

Channel breakdown

R64

G24

B13

Red64 (25.1%)

Green24 (9.4%)

Blue13 (5.1%)

Hue12.94°

Saturation (HSL)66.23%

Lightness15.1%

Dominant channelRed

Hex per channelR 40 · G 18 · B 0D

Keep nerding

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

#40180D

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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