Recognised as Colour

#3F181F

#3F181F
Red
Dark
Nearest: Black

#3F181F is a red with RGB values 63, 24, 31 and HSL 349°, 45%, 17%. It is a dark colour, so white text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#3F181F#3F181F

HEX#3F181F

RGBrgb(63, 24, 31)

RGB (0–1)0.2471, 0.0941, 0.1216

RGB percentages24.7%, 9.4%, 12.2%

HSLhsl(349.2, 44.8%, 17.1%)

HSV / HSBhsv(349.2, 61.9%, 24.7%)

CMYK0%, 61.9%, 50.8%, 75.3%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,134,943

CSS custom property--colour: #3F181F;

Brightness & contrast

Relative luminance0.01809WCAG 2.x, 0 is black and 1 is white

Perceived brightness40.4 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 15.42:1

Contrast with white15.42:1WCAG normal text: AAA

Contrast with black1.36:1WCAG normal text: Fail

Greyscale equivalent#212121

Inverted#C0E7E0

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#20201Fno red cones; affects about 1% of men; ΔE 20.6 from the original

Deuteranopia#2A271Eno green cones; the most common form, about 1% of men; ΔE 20.5 from the original

Tritanopia#45131Bno blue cones; rare, and affects men and women equally; ΔE 5.7 from the original

Distinguishable without hueYesnever rely on hue alone to carry meaning

Contrast with white, large text15.42:1WCAG large text: AAA

Contrast with black, large text1.36:1WCAG large text: Fail

Named colours

Black · ΔE 25 Dim grey · ΔE 36.2 Dark slate grey · ΔE 36.7 Saddle brown · ΔE 43.7 Sienna · ΔE 43.8 Gray · ΔE 44.1

Nearest named CSS colourBlack (#000000)ΔE 24.96, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#183F38

Analogous#3F1832, #3F2518

Triadic#1F3F18, #181F3F

Split complementary#183F24, #18323F

Tetradic#333F18, #183F38, #25183F

Tints, shades & saturation

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

Lighter +40%#C36072

Lighter +30%#AE4256

Lighter +20%#893443

Lighter +10%#642631

Darker −10%#1A0A0D

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#4A0D18

Less saturated −25%#342326

Channel breakdown

R63

G24

B31

Red63 (24.7%)

Green24 (9.4%)

Blue31 (12.2%)

Hue349.23°

Saturation (HSL)44.83%

Lightness17.06%

Dominant channelRed

Hex per channelR 3F · G 18 · B 1F

Keep nerding

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

#3F181F

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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