Recognised as Colour
#172DA4
- #172DA4
- Blue
- Dark
- Nearest: Navy
#172DA4 is a blue with RGB values 23, 45, 164 and HSL 231°, 75%, 37%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Navy.
Colour values
#172DA4#172DA4
HEX#172DA4
RGBrgb(23, 45, 164)
RGB (0–1)0.0902, 0.1765, 0.6431
RGB percentages9%, 17.6%, 64.3%
HSLhsl(230.6, 75.4%, 36.7%)
HSV / HSBhsv(230.6, 86%, 64.3%)
CMYK86%, 72.6%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,519,012
CSS custom property--colour: #172DA4;
Brightness & contrast
Relative luminance0.04739WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.78:1
Contrast with white10.78:1WCAG normal text: AAA
Contrast with black1.95:1WCAG normal text: Fail
Greyscale equivalent#313131
Inverted#E8D25B
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.78:1WCAG large text: AAA
Contrast with black, large text1.95:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#A48E17
Analogous#1773A4, #4817A4
Triadic#A4172D, #2DA417
Split complementary#A44817, #73A417
Tetradic#A41773, #A48E17, #17A448
Tints, shades & saturation
Channel breakdown
R23
G45
B164
Red23 (9%)
Green45 (17.6%)
Blue164 (64.3%)
Hue230.64°
Saturation (HSL)75.4%
Lightness36.67%
Dominant channelBlue
Hex per channelR 17 · G 2D · B A4
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