Recognised as Colour
#FB3C55
- #FB3C55
- Red
- Dark
- Nearest: Crimson
#FB3C55 is a red with RGB values 251, 60, 85 and HSL 352°, 96%, 61%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Crimson.
Colour values
#FB3C55#FB3C55
HEX#FB3C55
RGBrgb(251, 60, 85)
RGB (0–1)0.9843, 0.2353, 0.3333
RGB percentages98.4%, 23.5%, 33.3%
HSLhsl(352.1, 96%, 61%)
HSV / HSBhsv(352.1, 76.1%, 98.4%)
CMYK0%, 76.1%, 66.1%, 1.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,464,981
CSS custom property--colour: #FB3C55;
Brightness & contrast
Relative luminance0.24397WCAG 2.x, 0 is black and 1 is white
Perceived brightness147.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.88:1
Contrast with white3.57:1WCAG normal text: Fail
Contrast with black5.88:1WCAG normal text: AA
Greyscale equivalent#666666
Inverted#04C3AA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.57:1WCAG large text: AA
Contrast with black, large text5.88:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#3CFBE2
Analogous#FB3CB4, #FB833C
Triadic#55FB3C, #3C55FB
Split complementary#3CFB83, #3CB4FB
Tetradic#B4FB3C, #3CFBE2, #833CFB
Tints, shades & saturation
Channel breakdown
R251
G60
B85
Red251 (98.4%)
Green60 (23.5%)
Blue85 (33.3%)
Hue352.15°
Saturation (HSL)95.98%
Lightness60.98%
Dominant channelRed
Hex per channelR FB · G 3C · B 55
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Also reads as
FB3C55 (chemical formula)
- Formula
- 712.033 g/mol
- 59 atoms
FB3C55 has a molar mass of 712.033 g/mol, made up of 59 atoms across 3 elements: 1 × F, 3 × B, 55 × C.
Molar mass
Molar mass712.033 g/mol
Total atoms per molecule59
Distinct elements3
Mass of one molecule1.1823586 × 10^-21 g
Molecules per gram8.4576709 × 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
F2.7%
B4.6%
C92.8%
Fluorine (F)18.998 g/mol, 2.668%
Boron (B × 3)32.43 g/mol, 4.555%
Carbon (C × 55)660.605 g/mol, 92.777%
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