Recognised as Colour
#F82503
- #F82503
- Red
- Dark
- Nearest: Red
#F82503 is a red with RGB values 248, 37, 3 and HSL 8°, 98%, 49%. It is a dark colour, so black text on it reaches 5.3:1 contrast (AA for normal text). The nearest named colour is Red.
Colour values
#F82503#F82503
HEX#F82503
RGBrgb(248, 37, 3)
RGB (0–1)0.9725, 0.1451, 0.0118
RGB percentages97.3%, 14.5%, 1.2%
HSLhsl(8.3, 97.6%, 49.2%)
HSV / HSBhsv(8.3, 98.8%, 97.3%)
CMYK0%, 85.1%, 98.8%, 2.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,262,403
CSS custom property--colour: #F82503;
Brightness & contrast
Relative luminance0.21286WCAG 2.x, 0 is black and 1 is white
Perceived brightness138.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.26:1
Contrast with white3.99:1WCAG normal text: Fail
Contrast with black5.26:1WCAG normal text: AA
Greyscale equivalent#4F4F4F
Inverted#07DAFC
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.99:1WCAG large text: AA
Contrast with black, large text5.26:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#03D6F8
Analogous#F8035C, #F89F03
Triadic#03F825, #2503F8
Split complementary#03F8A0, #035BF8
Tetradic#5CF803, #03D6F8, #9F03F8
Tints, shades & saturation
Channel breakdown
R248
G37
B3
Red248 (97.3%)
Green37 (14.5%)
Blue3 (1.2%)
Hue8.33°
Saturation (HSL)97.61%
Lightness49.22%
Dominant channelRed
Hex per channelR F8 · G 25 · B 03
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Also reads as
F82503 (chemical formula)
- Formula
- 1,567,391.994 g/mol
- 82503 atoms
F82503 has a molar mass of 1,567,391.994 g/mol, made up of 82503 atoms across 1 element: 82503 × F.
Molar mass
Molar mass1,567,391.994 g/mol
Total atoms per molecule82503
Distinct elements1
Mass of one molecule2.6027156 × 10^-18 g
Molecules per gram3.8421408 × 10^17
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
F100%
Fluorine (F × 82503)1,567,391.994 g/mol, 100%
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Elements in this formula
Nerdulate something else
Nothing in mind? Surprise me · today’s page