Recognised as Colour
#181D8F
- #181D8F
- Blue
- Dark
- Nearest: Navy
#181D8F is a blue with RGB values 24, 29, 143 and HSL 237°, 71%, 33%. It is a dark colour, so white text on it reaches 13:1 contrast (AAA for normal text). The nearest named colour is Navy.
Colour values
#181D8F#181D8F
HEX#181D8F
RGBrgb(24, 29, 143)
RGB (0–1)0.0941, 0.1137, 0.5608
RGB percentages9.4%, 11.4%, 56.1%
HSLhsl(237.5, 71.3%, 32.7%)
HSV / HSBhsv(237.5, 83.2%, 56.1%)
CMYK83.2%, 79.7%, 0%, 43.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,580,431
CSS custom property--colour: #181D8F;
Brightness & contrast
Relative luminance0.03056WCAG 2.x, 0 is black and 1 is white
Perceived brightness54.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.03:1
Contrast with white13.03:1WCAG normal text: AAA
Contrast with black1.61:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#E7E270
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.03:1WCAG large text: AAA
Contrast with black, large text1.61:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#8F8A18
Analogous#18588F, #4F188F
Triadic#8F181D, #1D8F18
Split complementary#8F4E18, #598F18
Tetradic#8F1858, #8F8A18, #188F4E
Tints, shades & saturation
Channel breakdown
R24
G29
B143
Red24 (9.4%)
Green29 (11.4%)
Blue143 (56.1%)
Hue237.48°
Saturation (HSL)71.26%
Lightness32.75%
Dominant channelBlue
Hex per channelR 18 · G 1D · B 8F
Keep nerding
Every link below is a page Nerdulator can generate from what it already knows about this value.
Nerdulate something else
Nothing in mind? Surprise me · today’s page