Colour
#FF5511
- #FF5511
- Orange
- Dark
- Nearest: Orange red
#FF5511 is a orange with RGB values 255, 85, 17 and HSL 17°, 100%, 53%. It is a dark colour, so black text on it reaches 6.6:1 contrast (AA for normal text). The nearest named colour is Orange red.
Colour values
#FF5511#FF5511
HEX#FF5511
HEX (short)#F51
RGBrgb(255, 85, 17)
RGB (0–1)1, 0.3333, 0.0667
RGB percentages100%, 33.3%, 6.7%
HSLhsl(17.1, 100%, 53.3%)
HSV / HSBhsv(17.1, 93.3%, 100%)
CMYK0%, 66.7%, 93.3%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer16,733,457
CSS custom property--colour: #FF5511;
Brightness & contrast
Relative luminance0.27797WCAG 2.x, 0 is black and 1 is white
Perceived brightness154 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 6.56:1
Contrast with white3.2:1WCAG normal text: Fail
Contrast with black6.56:1WCAG normal text: AA
Greyscale equivalent#747474
Inverted#00AAEE
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.2:1WCAG large text: AA
Contrast with black, large text6.56:1WCAG large text: AAA
Named colours
Hue familyorange
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#11BBFF
Analogous#FF1144, #FFCC11
Triadic#11FF55, #5511FF
Split complementary#11FFCC, #1144FF
Tetradic#44FF11, #11BBFF, #CC11FF
Tints, shades & saturation
Channel breakdown
R255
G85
B17
Red255 (100%)
Green85 (33.3%)
Blue17 (6.7%)
Hue17.14°
Saturation (HSL)100%
Lightness53.33%
Dominant channelRed
Hex per channelR FF · G 55 · B 11
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