Recognised as Colour
#FFB523
- #FFB523
- Orange
- Light
- Nearest: Orange
#FFB523 is a orange with RGB values 255, 181, 35 and HSL 40°, 100%, 57%. It is a light colour, so black text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Orange.
Colour values
#FFB523#FFB523
HEX#FFB523
RGBrgb(255, 181, 35)
RGB (0–1)1, 0.7098, 0.1373
RGB percentages100%, 71%, 13.7%
HSLhsl(39.8, 100%, 56.9%)
HSV / HSBhsv(39.8, 86.3%, 100%)
CMYK0%, 29%, 86.3%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,758,051
CSS custom property--colour: #FFB523;
Brightness & contrast
Relative luminance0.54429WCAG 2.x, 0 is black and 1 is white
Perceived brightness197 of 255ITU-R BT.601 weighting
Light or darkLight
Best text colour on this backgroundBlackcontrast 11.89:1
Contrast with white1.77:1WCAG normal text: Fail
Contrast with black11.89:1WCAG normal text: AAA
Greyscale equivalent#BABABA
Inverted#004ADC
Colour vision & accessibility
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text1.77:1WCAG large text: Fail
Contrast with black, large text11.89:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#236DFF
Analogous#FF4723, #DBFF23
Triadic#23FFB5, #B523FF
Split complementary#23DBFF, #4723FF
Tetradic#23FF47, #236DFF, #FF23DB
Tints, shades & saturation
Channel breakdown
R255
G181
B35
Red255 (100%)
Green181 (71%)
Blue35 (13.7%)
Hue39.82°
Saturation (HSL)100%
Lightness56.86%
Dominant channelRed
Hex per channelR FF · G B5 · B 23
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Also reads as
FFB523 (chemical formula)
- Formula
- 5,691.626 g/mol
- 525 atoms
FFB523 has a molar mass of 5,691.626 g/mol, made up of 525 atoms across 2 elements: 2 × F, 523 × B.
Molar mass
Molar mass5,691.626 g/mol
Total atoms per molecule525
Distinct elements2
Mass of one molecule9.4511673 × 10^-21 g
Molecules per gram1.0580704 × 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
F0.7%
B99.3%
Fluorine (F × 2)37.996 g/mol, 0.668%
Boron (B × 523)5,653.63 g/mol, 99.332%
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