Colour

#40010D

#40010D
Red
Dark
Nearest: Black

#40010D is a red with RGB values 64, 1, 13 and HSL 349°, 97%, 13%. It is a dark colour, so white text on it reaches 17.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#40010D#40010D

HEX#40010D

RGBrgb(64, 1, 13)

RGB (0–1)0.251, 0.0039, 0.051

RGB percentages25.1%, 0.4%, 5.1%

HSLhsl(348.6, 96.9%, 12.7%)

HSV / HSBhsv(348.6, 98.4%, 25.1%)

CMYK0%, 98.4%, 79.7%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,194,573

CSS custom property--colour: #40010D;

Brightness & contrast

Relative luminance0.01141WCAG 2.x, 0 is black and 1 is white

Perceived brightness35.3 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 17.1:1

Contrast with white17.1:1WCAG normal text: AAA

Contrast with black1.23:1WCAG normal text: Fail

Greyscale equivalent#0F0F0F

Inverted#BFFEF2

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#15130Dno red cones; affects about 1% of men; ΔE 31.3 from the original

Deuteranopia#25200Bno green cones; the most common form, about 1% of men; ΔE 31.3 from the original

Tritanopia#470006no blue cones; rare, and affects men and women equally; ΔE 6 from the original

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

Contrast with white, large text17.1:1WCAG large text: AAA

Contrast with black, large text1.23:1WCAG large text: Fail

Named colours

Black · ΔE 33.3 Maroon · ΔE 36.4 Brown · ΔE 39.3 Saddle brown · ΔE 41.1 Dark red · ΔE 41.4 Sienna · ΔE 42

Nearest named CSS colourBlack (#000000)ΔE 33.25, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#014034

Analogous#40012D, #401401

Triadic#0D4001, #010D40

Split complementary#014014, #012D40

Tetradic#2D4001, #014034, #140140

Tints, shades & saturation

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

Lighter +40%#FB123E

Lighter +30%#D7032C

Lighter +20%#A40321

Lighter +10%#720217

Darker −10%#0E0003

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#41000C

Less saturated −25%#380912

Channel breakdown

R64

B13

Red64 (25.1%)

Green1 (0.4%)

Blue13 (5.1%)

Hue348.57°

Saturation (HSL)96.92%

Lightness12.75%

Dominant channelRed

Hex per channelR 40 · G 01 · B 0D

Keep nerding

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

#40010D

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

Nerdulate something else