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Colour

#644C54

  • #644C54
  • Red
  • Dark
  • Nearest: Dim grey

#644C54 is a red with RGB values 100, 76, 84 and HSL 340°, 14%, 35%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dim grey.

Colour values

#644C54#644C54
HEX#644C54
RGBrgb(100, 76, 84)
RGB (0–1)0.3922, 0.298, 0.3294
RGB percentages39.2%, 29.8%, 32.9%
HSLhsl(340, 13.6%, 34.5%)
HSV / HSBhsv(340, 24%, 39.2%)
CMYK0%, 24%, 16%, 60.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer6,573,140
CSS custom property--colour: #644C54;

Brightness & contrast

Relative luminance0.08518WCAG 2.x, 0 is black and 1 is white
Perceived brightness84.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.77:1
Contrast with white7.77:1WCAG normal text: AAA
Contrast with black2.7:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#9BB3AB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4F5054no red cones; affects about 1% of men; ΔE 11.2 from the original
Deuteranopia#545453no green cones; the most common form, about 1% of men; ΔE 11.9 from the original
Tritanopia#684B4Fno blue cones; rare, and affects men and women equally; ΔE 3.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.77:1WCAG large text: AAA
Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Dim grey · ΔE 14.9Gray · ΔE 21.9Dark slate grey · ΔE 23.8Slate grey · ΔE 24.5Light slate grey · ΔE 27.1Rosy brown · ΔE 30
Nearest named CSS colourDim grey (#696969)ΔE 14.9, a distinctly different colour
Hue familyred
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4C645C
Analogous#644C60, #64504C
Triadic#54644C, #4C5464
Split complementary#4C6450, #4C6064
Tetradic#60644C, #4C645C, #504C64

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C7B5BB
Lighter +30%#B198A0
Lighter +20%#9B7B86
Lighter +10%#81626C
Darker −10%#47363C
Darker −20%#2A2023
Darker −30%#0D0A0B
Darker −40%#000000
More saturated +25%#7A364D
Less saturated −25%#585858

Channel breakdown

R100
G76
B84
Red100 (39.2%)
Green76 (29.8%)
Blue84 (32.9%)
Hue340°
Saturation (HSL)13.64%
Lightness34.51%
Dominant channelRed
Hex per channelR 64 · G 4C · B 54

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Every value on this page was computed from “644c54” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.