Recognised as Colour
#FCFB51
- #FCFB51
- Yellow
- Light
- Nearest: Yellow
#FCFB51 is a yellow with RGB values 252, 251, 81 and HSL 60°, 97%, 65%. It is a light colour, so black text on it reaches 19.1:1 contrast (AAA for normal text). The nearest named colour is Yellow.
Colour values
#FCFB51#FCFB51
HEX#FCFB51
RGBrgb(252, 251, 81)
RGB (0–1)0.9882, 0.9843, 0.3176
RGB percentages98.8%, 98.4%, 31.8%
HSLhsl(59.6, 96.6%, 65.3%)
HSV / HSBhsv(59.6, 67.9%, 98.8%)
CMYK0%, 0.4%, 67.9%, 1.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,579,409
CSS custom property--colour: #FCFB51;
Brightness & contrast
Relative luminance0.90284WCAG 2.x, 0 is black and 1 is white
Perceived brightness238.2 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 19.06:1
Contrast with white1.1:1WCAG normal text: Fail
Contrast with black19.06:1WCAG normal text: AAA
Greyscale equivalent#EFEFEF
Inverted#0304AE
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.1:1WCAG large text: Fail
Contrast with black, large text19.06:1WCAG large text: AAA
Named colours
Hue familyyellow
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#5152FC
Analogous#FCA551, #A8FC51
Triadic#51FCFB, #FB51FC
Split complementary#51A8FC, #A551FC
Tetradic#51FCA5, #5152FC, #FC51A8
Tints, shades & saturation
Channel breakdown
R252
G251
B81
Red252 (98.8%)
Green251 (98.4%)
Blue81 (31.8%)
Hue59.65°
Saturation (HSL)96.61%
Lightness65.29%
Dominant channelRed
Hex per channelR FC · G FB · B 51
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Harmonies
Similar named colours
Also reads as
FCFB51 (chemical formula)
- Formula
- 601.317 g/mol
- 54 atoms
FCFB51 has a molar mass of 601.317 g/mol, made up of 54 atoms across 3 elements: 2 × F, 1 × C, 51 × B.
Molar mass
Molar mass601.317 g/mol
Total atoms per molecule54
Distinct elements3
Mass of one molecule9.9851037 × 10^-22 g
Molecules per gram1.0014919 × 10^21
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
F6.3%
C2%
B91.7%
Fluorine (F × 2)37.996 g/mol, 6.319%
Carbon (C)12.011 g/mol, 1.997%
Boron (B × 51)551.31 g/mol, 91.684%
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