Recognised as Colour
#1231BB
- #1231BB
- Blue
- Dark
- Nearest: Dark blue
#1231BB is a blue with RGB values 18, 49, 187 and HSL 229°, 82%, 40%. It is a dark colour, so white text on it reaches 9.6:1 contrast (AAA for normal text). The nearest named colour is Dark blue.
Colour values
#1231BB#1231BB
HEX#1231BB
RGBrgb(18, 49, 187)
RGB (0–1)0.0706, 0.1922, 0.7333
RGB percentages7.1%, 19.2%, 73.3%
HSLhsl(229, 82.4%, 40.2%)
HSV / HSBhsv(229, 90.4%, 73.3%)
CMYK90.4%, 73.8%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,192,379
CSS custom property--colour: #1231BB;
Brightness & contrast
Relative luminance0.05913WCAG 2.x, 0 is black and 1 is white
Perceived brightness74.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.62:1
Contrast with white9.62:1WCAG normal text: AAA
Contrast with black2.18:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#EDCE44
Colour vision & accessibility
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text9.62:1WCAG large text: AAA
Contrast with black, large text2.18:1WCAG large text: Fail
Named colours
Hue familyblue
CSS keyword usableNo exact keyword
Colour harmonies
Complementary#BB9C12
Analogous#1285BB, #4812BB
Triadic#BB1231, #31BB12
Split complementary#BB4812, #85BB12
Tetradic#BB1285, #BB9C12, #12BB48
Tints, shades & saturation
Channel breakdown
R18
G49
B187
Red18 (7.1%)
Green49 (19.2%)
Blue187 (73.3%)
Hue228.99°
Saturation (HSL)82.44%
Lightness40.2%
Dominant channelBlue
Hex per channelR 12 · G 31 · B BB
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