Recognised as Colour
#FB563C
- #FB563C
- Red
- Dark
- Nearest: Tomato
#FB563C is a red with RGB values 251, 86, 60 and HSL 8°, 96%, 61%. It is a dark colour, so black text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Tomato.
Colour values
#FB563C#FB563C
HEX#FB563C
RGBrgb(251, 86, 60)
RGB (0–1)0.9843, 0.3373, 0.2353
RGB percentages98.4%, 33.7%, 23.5%
HSLhsl(8.2, 96%, 61%)
HSV / HSBhsv(8.2, 76.1%, 98.4%)
CMYK0%, 65.7%, 76.1%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,471,612
CSS custom property--colour: #FB563C;
Brightness & contrast
Relative luminance0.27491WCAG 2.x, 0 is black and 1 is white
Perceived brightness153.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.5:1
Contrast with white3.23:1WCAG normal text: Fail
Contrast with black6.5:1WCAG normal text: AA
Greyscale equivalent#777777
Inverted#04A9C3
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.23:1WCAG large text: AA
Contrast with black, large text6.5:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3CE1FB
Analogous#FB3C82, #FBB63C
Triadic#3CFB56, #563CFB
Split complementary#3CFBB6, #3C81FB
Tetradic#81FB3C, #3CE1FB, #B53CFB
Tints, shades & saturation
Channel breakdown
R251
G86
B60
Red251 (98.4%)
Green86 (33.7%)
Blue60 (23.5%)
Hue8.17°
Saturation (HSL)95.98%
Lightness60.98%
Dominant channelRed
Hex per channelR FB · G 56 · B 3C
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Also reads as
FB563C (chemical formula)
- Formula
- 6,117.039 g/mol
- 565 atoms
FB563C has a molar mass of 6,117.039 g/mol, made up of 565 atoms across 3 elements: 1 × F, 563 × B, 1 × C.
Molar mass
Molar mass6,117.039 g/mol
Total atoms per molecule565
Distinct elements3
Mass of one molecule1.0157582 × 10^-20 g
Molecules per gram9.8448625 × 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
F0.3%
B99.5%
C0.2%
Fluorine (F)18.998 g/mol, 0.311%
Boron (B × 563)6,086.03 g/mol, 99.493%
Carbon (C)12.011 g/mol, 0.196%
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