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Recognised as Colour

#400A24

  • #400A24
  • Red
  • Dark
  • Nearest: Black

#400A24 is a red with RGB values 64, 10, 36 and HSL 331°, 73%, 15%. It is a dark colour, so white text on it reaches 16.3:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#400A24#400A24
HEX#400A24
RGBrgb(64, 10, 36)
RGB (0–1)0.251, 0.0392, 0.1412
RGB percentages25.1%, 3.9%, 14.1%
HSLhsl(331.1, 73%, 14.5%)
HSV / HSBhsv(331.1, 84.4%, 25.1%)
CMYK0%, 84.4%, 43.8%, 74.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,196,900
CSS custom property--colour: #400A24;

Brightness & contrast

Relative luminance0.01434WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 16.32:1
Contrast with white16.32:1WCAG normal text: AAA
Contrast with black1.29:1WCAG normal text: Fail
Greyscale equivalent#171717
Inverted#BFF5DB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#151925no red cones; affects about 1% of men; ΔE 27.1 from the original
Deuteranopia#242423no green cones; the most common form, about 1% of men; ΔE 28.5 from the original
Tritanopia#460515no blue cones; rare, and affects men and women equally; ΔE 11.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text16.32:1WCAG large text: AAA
Contrast with black, large text1.29:1WCAG large text: Fail

Named colours

Black · ΔE 30.7Dim grey · ΔE 42.8Dark slateblue · ΔE 43.8Dark slate grey · ΔE 44.1Brown · ΔE 46.9Maroon · ΔE 47.1
Nearest named CSS colourBlack (#000000)ΔE 30.65, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#0A4026
Analogous#400A3F, #400B0A
Triadic#24400A, #0A2440
Split complementary#0A400B, #0A3F40
Tetradic#3F400A, #0A4026, #0B0A40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E03688
Lighter +30%#C41F6E
Lighter +20%#981856
Lighter +10%#6C113D
Darker −10%#14030B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#490124
Less saturated −25%#371324

Channel breakdown

R64
G10
B36
Red64 (25.1%)
Green10 (3.9%)
Blue36 (14.1%)
Hue331.11°
Saturation (HSL)72.97%
Lightness14.51%
Dominant channelRed
Hex per channelR 40 · G 0A · B 24

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Every value on this page was computed from “400a24” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.