Recognised as Colour
#FF6C57
- #FF6C57
- Red
- Dark
- Nearest: Tomato
#FF6C57 is a red with RGB values 255, 108, 87 and HSL 7°, 100%, 67%. It is a dark colour, so black text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Tomato.
Colour values
#FF6C57#FF6C57
HEX#FF6C57
RGBrgb(255, 108, 87)
RGB (0–1)1, 0.4235, 0.3412
RGB percentages100%, 42.4%, 34.1%
HSLhsl(7.5, 100%, 67.1%)
HSV / HSBhsv(7.5, 65.9%, 100%)
CMYK0%, 57.6%, 65.9%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,739,415
CSS custom property--colour: #FF6C57;
Brightness & contrast
Relative luminance0.32673WCAG 2.x, 0 is black and 1 is white
Perceived brightness164.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.53:1
Contrast with white2.79:1WCAG normal text: Fail
Contrast with black7.53:1WCAG normal text: AAA
Greyscale equivalent#8A8A8A
Inverted#0093A8
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.79:1WCAG large text: Fail
Contrast with black, large text7.53:1WCAG large text: AAA
Named colours
Hue familyred
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#57EAFF
Analogous#FF5796, #FFC057
Triadic#57FF6C, #6C57FF
Split complementary#57FFC0, #5796FF
Tetradic#96FF57, #57EAFF, #C057FF
Tints, shades & saturation
Channel breakdown
R255
G108
B87
Red255 (100%)
Green108 (42.4%)
Blue87 (34.1%)
Hue7.5°
Saturation (HSL)100%
Lightness67.06%
Dominant channelRed
Hex per channelR FF · G 6C · B 57
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Also reads as
FF6C57 (chemical formula)
- Formula
- 817.613 g/mol
- 64 atoms
FF6C57 has a molar mass of 817.613 g/mol, made up of 64 atoms across 2 elements: 7 × F, 57 × C.
Molar mass
Molar mass817.613 g/mol
Total atoms per molecule64
Distinct elements2
Mass of one molecule1.3576783 × 10^-21 g
Molecules per gram7.3655149 × 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
F16.3%
C83.7%
Fluorine (F × 7)132.986 g/mol, 16.265%
Carbon (C × 57)684.627 g/mol, 83.735%
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