Recognised as Colour
#FF217B
- #FF217B
- Red
- Dark
- Nearest: Deep pink
#FF217B is a red with RGB values 255, 33, 123 and HSL 336°, 100%, 56%. It is a dark colour, so black text on it reaches 5.8:1 contrast (AA for normal text). The nearest named colour is Deep pink.
Colour values
#FF217B#FF217B
HEX#FF217B
RGBrgb(255, 33, 123)
RGB (0–1)1, 0.1294, 0.4824
RGB percentages100%, 12.9%, 48.2%
HSLhsl(335.7, 100%, 56.5%)
HSV / HSBhsv(335.7, 87.1%, 100%)
CMYK0%, 87.1%, 51.8%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,720,251
CSS custom property--colour: #FF217B;
Brightness & contrast
Relative luminance0.23778WCAG 2.x, 0 is black and 1 is white
Perceived brightness147.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.76:1
Contrast with white3.65:1WCAG normal text: Fail
Contrast with black5.76:1WCAG normal text: AA
Greyscale equivalent#575757
Inverted#00DE84
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.65:1WCAG large text: AA
Contrast with black, large text5.76:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#21FFA5
Analogous#FF21EA, #FF3621
Triadic#7BFF21, #217BFF
Split complementary#21FF36, #21EAFF
Tetradic#EAFF21, #21FFA5, #3621FF
Tints, shades & saturation
Channel breakdown
R255
G33
B123
Red255 (100%)
Green33 (12.9%)
Blue123 (48.2%)
Hue335.68°
Saturation (HSL)100%
Lightness56.47%
Dominant channelRed
Hex per channelR FF · G 21 · B 7B
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Also reads as
FF217B (chemical formula)
- Formula
- 4,152.374 g/mol
- 219 atoms
FF217B has a molar mass of 4,152.374 g/mol, made up of 219 atoms across 2 elements: 218 × F, 1 × B.
Molar mass
Molar mass4,152.374 g/mol
Total atoms per molecule219
Distinct elements2
Mass of one molecule6.8951792 × 10^-21 g
Molecules per gram1.4502886 × 10^20
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
F99.7%
B0.3%
Fluorine (F × 218)4,141.564 g/mol, 99.74%
Boron (B)10.81 g/mol, 0.26%
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