Recognised as Colour
#FF7557
- #FF7557
- Red
- Dark
- Nearest: Coral
#FF7557 is a red with RGB values 255, 117, 87 and HSL 11°, 100%, 67%. It is a dark colour, so black text on it reaches 7.9:1 contrast (AAA for normal text). The nearest named colour is Coral.
Colour values
#FF7557#FF7557
HEX#FF7557
RGBrgb(255, 117, 87)
RGB (0–1)1, 0.4588, 0.3412
RGB percentages100%, 45.9%, 34.1%
HSLhsl(10.7, 100%, 67.1%)
HSV / HSBhsv(10.7, 65.9%, 100%)
CMYK0%, 54.1%, 65.9%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,741,719
CSS custom property--colour: #FF7557;
Brightness & contrast
Relative luminance0.34671WCAG 2.x, 0 is black and 1 is white
Perceived brightness168.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.93:1
Contrast with white2.65:1WCAG normal text: Fail
Contrast with black7.93:1WCAG normal text: AAA
Greyscale equivalent#909090
Inverted#008AA8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.65:1WCAG large text: Fail
Contrast with black, large text7.93:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#57E1FF
Analogous#FF578D, #FFC957
Triadic#57FF75, #7557FF
Split complementary#57FFC9, #578DFF
Tetradic#8DFF57, #57E1FF, #C957FF
Tints, shades & saturation
Channel breakdown
R255
G117
B87
Red255 (100%)
Green117 (45.9%)
Blue87 (34.1%)
Hue10.71°
Saturation (HSL)100%
Lightness67.06%
Dominant channelRed
Hex per channelR FF · G 75 · B 57
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Also reads as
FF7557 (chemical formula)
- Formula
- 143,586.884 g/mol
- 7558 atoms
FF7557 has a molar mass of 143,586.884 g/mol, made up of 7558 atoms across 1 element: 7558 × F.
Molar mass
Molar mass143,586.884 g/mol
Total atoms per molecule7558
Distinct elements1
Mass of one molecule2.3843163 × 10^-19 g
Molecules per gram4.1940744 × 10^18
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 × 7558)143,586.884 g/mol, 100%
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