Recognised as Colour
#FF3971
- #FF3971
- Red
- Dark
- Nearest: Crimson
#FF3971 is a red with RGB values 255, 57, 113 and HSL 343°, 100%, 61%. It is a dark colour, so black text on it reaches 6.1:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#FF3971#FF3971
HEX#FF3971
RGBrgb(255, 57, 113)
RGB (0–1)1, 0.2235, 0.4431
RGB percentages100%, 22.4%, 44.3%
HSLhsl(343, 100%, 61.2%)
HSV / HSBhsv(343, 77.6%, 100%)
CMYK0%, 77.6%, 55.7%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,726,385
CSS custom property--colour: #FF3971;
Brightness & contrast
Relative luminance0.25379WCAG 2.x, 0 is black and 1 is white
Perceived brightness151 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.08:1
Contrast with white3.46:1WCAG normal text: Fail
Contrast with black6.08:1WCAG normal text: AA
Greyscale equivalent#676767
Inverted#00C68E
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.46:1WCAG large text: AA
Contrast with black, large text6.08:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#39FFC7
Analogous#FF39D4, #FF6439
Triadic#71FF39, #3971FF
Split complementary#39FF64, #39D4FF
Tetradic#D4FF39, #39FFC7, #6439FF
Tints, shades & saturation
Channel breakdown
R255
G57
B113
Red255 (100%)
Green57 (22.4%)
Blue113 (44.3%)
Hue343.03°
Saturation (HSL)100%
Lightness61.18%
Dominant channelRed
Hex per channelR FF · G 39 · B 71
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Also reads as
FF3971 (chemical formula)
- Formula
- 75,460.056 g/mol
- 3972 atoms
FF3971 has a molar mass of 75,460.056 g/mol, made up of 3972 atoms across 1 element: 3972 × F.
Molar mass
Molar mass75,460.056 g/mol
Total atoms per molecule3972
Distinct elements1
Mass of one molecule1.2530437 × 10^-19 g
Molecules per gram7.9805676 × 10^18
Name
NameNot in the name tablea name cannot be worked out from a formula alone: isomers share formulas, and naming depends on bonding the formula does not show
Composition by mass
F100%
Fluorine (F × 3972)75,460.056 g/mol, 100%
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