Recognised as Colour
#F74037
- #F74037
- Red
- Dark
- Nearest: Tomato
#F74037 is a red with RGB values 247, 64, 55 and HSL 3°, 92%, 59%. It is a dark colour, so black text on it reaches 5.7:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#F74037#F74037
HEX#F74037
RGBrgb(247, 64, 55)
RGB (0–1)0.9686, 0.251, 0.2157
RGB percentages96.9%, 25.1%, 21.6%
HSLhsl(2.8, 92.3%, 59.2%)
HSV / HSBhsv(2.8, 77.7%, 96.9%)
CMYK0%, 74.1%, 77.7%, 3.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,203,831
CSS custom property--colour: #F74037;
Brightness & contrast
Relative luminance0.23717WCAG 2.x, 0 is black and 1 is white
Perceived brightness144.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.74:1
Contrast with white3.66:1WCAG normal text: Fail
Contrast with black5.74:1WCAG normal text: AA
Greyscale equivalent#666666
Inverted#08BFC8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.66:1WCAG large text: AA
Contrast with black, large text5.74:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#37EEF7
Analogous#F7378E, #F7A037
Triadic#37F740, #4037F7
Split complementary#37F7A0, #378EF7
Tetradic#8EF737, #37EEF7, #A037F7
Tints, shades & saturation
Channel breakdown
R247
G64
B55
Red247 (96.9%)
Green64 (25.1%)
Blue55 (21.6%)
Hue2.81°
Saturation (HSL)92.31%
Lightness59.22%
Dominant channelRed
Hex per channelR F7 · G 40 · B 37
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Also reads as
F74037 (chemical formula)
- Formula
- 1,406,554.926 g/mol
- 74037 atoms
F74037 has a molar mass of 1,406,554.926 g/mol, made up of 74037 atoms across 1 element: 74037 × F.
Molar mass
Molar mass1,406,554.926 g/mol
Total atoms per molecule74037
Distinct elements1
Mass of one molecule2.3356394 × 10^-18 g
Molecules per gram4.2814828 × 10^17
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 × 74037)1,406,554.926 g/mol, 100%
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