Recognised as Colour
#F33335
- #F33335
- Red
- Dark
- Nearest: Crimson
#F33335 is a red with RGB values 243, 51, 53 and HSL 359°, 89%, 58%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#F33335#F33335
HEX#F33335
RGBrgb(243, 51, 53)
RGB (0–1)0.9529, 0.2, 0.2078
RGB percentages95.3%, 20%, 20.8%
HSLhsl(359.4, 88.9%, 57.6%)
HSV / HSBhsv(359.4, 79%, 95.3%)
CMYK0%, 79%, 78.2%, 4.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,938,357
CSS custom property--colour: #F33335;
Brightness & contrast
Relative luminance0.21679WCAG 2.x, 0 is black and 1 is white
Perceived brightness139.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.34:1
Contrast with white3.94:1WCAG normal text: Fail
Contrast with black5.34:1WCAG normal text: AA
Greyscale equivalent#5C5C5C
Inverted#0CCCCA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.94:1WCAG large text: AA
Contrast with black, large text5.34:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#33F3F1
Analogous#F33395, #F39133
Triadic#35F333, #3335F3
Split complementary#33F391, #3395F3
Tetradic#95F333, #33F3F1, #9133F3
Tints, shades & saturation
Channel breakdown
R243
G51
B53
Red243 (95.3%)
Green51 (20%)
Blue53 (20.8%)
Hue359.38°
Saturation (HSL)88.89%
Lightness57.65%
Dominant channelRed
Hex per channelR F3 · G 33 · B 35
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Also reads as
F33335 (chemical formula)
- Formula
- 633,298.33 g/mol
- 33335 atoms
F33335 has a molar mass of 633,298.33 g/mol, made up of 33335 atoms across 1 element: 33335 × F.
Molar mass
Molar mass633,298.33 g/mol
Total atoms per molecule33335
Distinct elements1
Mass of one molecule1.0516166 × 10^-18 g
Molecules per gram9.5091689 × 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 × 33335)633,298.33 g/mol, 100%
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