Recognised as Colour

#400A0A

#400A0A
Red
Dark
Nearest: Black

#400A0A is a red with RGB values 64, 10, 10 and HSL 0°, 73%, 15%. It is a dark colour, so white text on it reaches 16.6:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#400A0A#400A0A

HEX#400A0A

RGBrgb(64, 10, 10)

RGB (0–1)0.251, 0.0392, 0.0392

RGB percentages25.1%, 3.9%, 3.9%

HSLhsl(0, 73%, 14.5%)

HSV / HSBhsv(0, 84.4%, 25.1%)

CMYK0%, 84.4%, 84.4%, 74.9%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer4,196,874

CSS custom property--colour: #400A0A;

Brightness & contrast

Relative luminance0.01329WCAG 2.x, 0 is black and 1 is white

Perceived brightness36 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 16.59:1

Contrast with white16.59:1WCAG normal text: AAA

Contrast with black1.27:1WCAG normal text: Fail

Greyscale equivalent#151515

Inverted#BFF5F5

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#1A1709no red cones; affects about 1% of men; ΔE 27.8 from the original

Deuteranopia#282308no green cones; the most common form, about 1% of men; ΔE 27.8 from the original

Tritanopia#47000Bno blue cones; rare, and affects men and women equally; ΔE 6.6 from the original

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

Contrast with white, large text16.59:1WCAG large text: AAA

Contrast with black, large text1.27:1WCAG large text: Fail

Named colours

Black · ΔE 31.3 Maroon · ΔE 35.9 Saddle brown · ΔE 37.7 Brown · ΔE 39.2 Sienna · ΔE 39.2 Dark red · ΔE 40.9

Nearest named CSS colourBlack (#000000)ΔE 31.33, a distinctly different colour

Hue familyred

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#0A4040

Analogous#400A25, #40250A

Triadic#0A400A, #0A0A40

Split complementary#0A4025, #0A2540

Tetradic#25400A, #0A4040, #250A40

Tints, shades & saturation

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

Lighter +40%#E03636

Lighter +30%#C41F1F

Lighter +20%#981818

Lighter +10%#6C1111

Darker −10%#140303

Darker −20%#000000

Darker −30%#000000

Darker −40%#000000

More saturated +25%#490101

Less saturated −25%#371313

Channel breakdown

R64

G10

B10

Red64 (25.1%)

Green10 (3.9%)

Blue10 (3.9%)

Hue0°

Saturation (HSL)72.97%

Lightness14.51%

Dominant channelRed

Hex per channelR 40 · G 0A · B 0A

Keep nerding

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

#400A0A

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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