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Recognised as Colour

#643A4C

  • #643A4C
  • Red
  • Dark
  • Nearest: Dim grey

#643A4C is a red with RGB values 100, 58, 76 and HSL 334°, 27%, 31%. It is a dark colour, so white text on it reaches 9.3:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#643A4C#643A4C
HEX#643A4C
RGBrgb(100, 58, 76)
RGB (0–1)0.3922, 0.2275, 0.298
RGB percentages39.2%, 22.7%, 29.8%
HSLhsl(334.3, 26.6%, 31%)
HSV / HSBhsv(334.3, 42%, 39.2%)
CMYK0%, 42%, 24%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,568,524
CSS custom property--colour: #643A4C;

Brightness & contrast

Relative luminance0.06257WCAG 2.x, 0 is black and 1 is white
Perceived brightness75 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.33:1
Contrast with white9.33:1WCAG normal text: AAA
Contrast with black2.25:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#9BC5B3

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#3F424Dno red cones; affects about 1% of men; ΔE 20.3 from the original
Deuteranopia#494A4Bno green cones; the most common form, about 1% of men; ΔE 21.6 from the original
Tritanopia#6A3840no blue cones; rare, and affects men and women equally; ΔE 8.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.33:1WCAG large text: AAA
Contrast with black, large text2.25:1WCAG large text: Fail

Named colours

Dim grey · ΔE 25.8Gray · ΔE 31.9Dark slate grey · ΔE 33Slate grey · ΔE 33.5Rosy brown · ΔE 35.2Light slate grey · ΔE 35.9
Nearest named CSS colourDim grey (#696969)ΔE 25.85, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3A6452
Analogous#643A61, #643D3A
Triadic#4C643A, #3A4C64
Split complementary#3A643D, #3A6164
Tetradic#61643A, #3A6452, #3D3A64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C9A1B2
Lighter +30%#B68198
Lighter +20%#A3617D
Lighter +10%#844D65
Darker −10%#442733
Darker −20%#23151B
Darker −30%#030202
Darker −40%#000000
More saturated +25%#782649
Less saturated −25%#504E4F

Channel breakdown

R100
G58
B76
Red100 (39.2%)
Green58 (22.7%)
Blue76 (29.8%)
Hue334.29°
Saturation (HSL)26.58%
Lightness30.98%
Dominant channelRed
Hex per channelR 64 · G 3A · B 4C

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Every value on this page was computed from “643a4c” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.