Recognised as Colour
#FB5564
- #FB5564
- Red
- Dark
- Nearest: Crimson
#FB5564 is a red with RGB values 251, 85, 100 and HSL 355°, 95%, 66%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#FB5564#FB5564
HEX#FB5564
RGBrgb(251, 85, 100)
RGB (0–1)0.9843, 0.3333, 0.3922
RGB percentages98.4%, 33.3%, 39.2%
HSLhsl(354.6, 95.4%, 65.9%)
HSV / HSBhsv(354.6, 66.1%, 98.4%)
CMYK0%, 66.1%, 60.2%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,471,396
CSS custom property--colour: #FB5564;
Brightness & contrast
Relative luminance0.27926WCAG 2.x, 0 is black and 1 is white
Perceived brightness155.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.59:1
Contrast with white3.19:1WCAG normal text: Fail
Contrast with black6.59:1WCAG normal text: AA
Greyscale equivalent#797979
Inverted#04AA9B
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.19:1WCAG large text: AA
Contrast with black, large text6.59:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#55FBEC
Analogous#FB55B7, #FB9955
Triadic#64FB55, #5564FB
Split complementary#55FB99, #55B7FB
Tetradic#B7FB55, #55FBEC, #9955FB
Tints, shades & saturation
Channel breakdown
R251
G85
B100
Red251 (98.4%)
Green85 (33.3%)
Blue100 (39.2%)
Hue354.58°
Saturation (HSL)95.4%
Lightness65.88%
Dominant channelRed
Hex per channelR FB · G 55 · B 64
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Also reads as
FB5564 (chemical formula)
- Formula
- 60,165.838 g/mol
- 5565 atoms
FB5564 has a molar mass of 60,165.838 g/mol, made up of 5565 atoms across 2 elements: 1 × F, 5564 × B.
Molar mass
Molar mass60,165.838 g/mol
Total atoms per molecule5565
Distinct elements2
Mass of one molecule9.9907725 × 10^-20 g
Molecules per gram1.0009236 × 10^19
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
F0%
B100%
Fluorine (F)18.998 g/mol, 0.032%
Boron (B × 5564)60,146.84 g/mol, 99.968%
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