Recognised as Colour
#F40025
- #F40025
- Red
- Dark
- Nearest: Red
#F40025 is a red with RGB values 244, 0, 37 and HSL 351°, 100%, 48%. It is a dark colour, so black text on it reaches 4.9:1 contrast (AA for normal text). The nearest named colour is Red.
Colour values
#F40025#F40025
HEX#F40025
RGBrgb(244, 0, 37)
RGB (0–1)0.9569, 0, 0.1451
RGB percentages95.7%, 0%, 14.5%
HSLhsl(350.9, 100%, 47.8%)
HSV / HSBhsv(350.9, 100%, 95.7%)
CMYK0%, 100%, 84.8%, 4.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer15,990,821
CSS custom property--colour: #F40025;
Brightness & contrast
Relative luminance0.19367WCAG 2.x, 0 is black and 1 is white
Perceived brightness134 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.87:1
Contrast with white4.31:1WCAG normal text: Fail
Contrast with black4.87:1WCAG normal text: AA
Greyscale equivalent#373737
Inverted#0BFFDA
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.31:1WCAG large text: AA
Contrast with black, large text4.87:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#00F4CF
Analogous#F4009F, #F45500
Triadic#25F400, #0025F4
Split complementary#00F455, #009FF4
Tetradic#9FF400, #00F4CF, #5500F4
Tints, shades & saturation
Channel breakdown
R244
G0
B37
Red244 (95.7%)
Green0 (0%)
Blue37 (14.5%)
Hue350.9°
Saturation (HSL)100%
Lightness47.84%
Dominant channelRed
Hex per channelR F4 · G 00 · B 25
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Also reads as
F40025 (chemical formula)
- Formula
- 760,394.95 g/mol
- 40025 atoms
F40025 has a molar mass of 760,394.95 g/mol, made up of 40025 atoms across 1 element: 40025 × F.
Molar mass
Molar mass760,394.95 g/mol
Total atoms per molecule40025
Distinct elements1
Mass of one molecule1.2626655 × 10^-18 g
Molecules per gram7.9197538 × 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 × 40025)760,394.95 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