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Recognised as Colour

#633F4F

  • #633F4F
  • Red
  • Dark
  • Nearest: Dim grey

#633F4F is a red with RGB values 99, 63, 79 and HSL 333°, 22%, 32%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#633F4F#633F4F
HEX#633F4F
RGBrgb(99, 63, 79)
RGB (0–1)0.3882, 0.2471, 0.3098
RGB percentages38.8%, 24.7%, 31%
HSLhsl(333.3, 22.2%, 31.8%)
HSV / HSBhsv(333.3, 36.4%, 38.8%)
CMYK0%, 36.4%, 20.2%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,504,271
CSS custom property--colour: #633F4F;

Brightness & contrast

Relative luminance0.06772WCAG 2.x, 0 is black and 1 is white
Perceived brightness77.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.92:1
Contrast with white8.92:1WCAG normal text: AAA
Contrast with black2.35:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#9CC0B0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#434650no red cones; affects about 1% of men; ΔE 17.5 from the original
Deuteranopia#4B4C4Eno green cones; the most common form, about 1% of men; ΔE 18.4 from the original
Tritanopia#683E45no blue cones; rare, and affects men and women equally; ΔE 6.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.92:1WCAG large text: AAA
Contrast with black, large text2.35:1WCAG large text: Fail

Named colours

Dim grey · ΔE 22.8Gray · ΔE 29Dark slate grey · ΔE 30.1Slate grey · ΔE 30.6Light slate grey · ΔE 33.1Rosy brown · ΔE 33.8
Nearest named CSS colourDim grey (#696969)ΔE 22.76, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3F6353
Analogous#633F61, #63413F
Triadic#4F633F, #3F4F63
Split complementary#3F6341, #3F6163
Tetradic#61633F, #3F6353, #413F63

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C7A7B5
Lighter +30%#B3889B
Lighter +20%#9F6981
Lighter +10%#825368
Darker −10%#442B36
Darker −20%#25171D
Darker −30%#050304
Darker −40%#000000
More saturated +25%#772B4D
Less saturated −25%#515151

Channel breakdown

R99
G63
B79
Red99 (38.8%)
Green63 (24.7%)
Blue79 (31%)
Hue333.33°
Saturation (HSL)22.22%
Lightness31.76%
Dominant channelRed
Hex per channelR 63 · G 3F · B 4F

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Every value on this page was computed from “633f4f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.