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Recognised as Colour

#180B48

  • #180B48
  • Blue
  • Dark
  • Nearest: Midnight blue

#180B48 is a blue with RGB values 24, 11, 72 and HSL 253°, 73%, 16%. It is a dark colour, so white text on it reaches 17.8:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#180B48#180B48
HEX#180B48
RGBrgb(24, 11, 72)
RGB (0–1)0.0941, 0.0431, 0.2824
RGB percentages9.4%, 4.3%, 28.2%
HSLhsl(252.8, 73.5%, 16.3%)
HSV / HSBhsv(252.8, 84.7%, 28.2%)
CMYK66.7%, 84.7%, 0%, 71.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,575,752
CSS custom property--colour: #180B48;

Brightness & contrast

Relative luminance0.00901WCAG 2.x, 0 is black and 1 is white
Perceived brightness28.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 17.79:1
Contrast with white17.79:1WCAG normal text: AAA
Contrast with black1.18:1WCAG normal text: Fail
Greyscale equivalent#121212
Inverted#E7F4B7

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#001A4Ano red cones; affects about 1% of men; ΔE 13.6 from the original
Deuteranopia#001647no green cones; the most common form, about 1% of men; ΔE 11.6 from the original
Tritanopia#001D29no blue cones; rare, and affects men and women equally; ΔE 39.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text17.79:1WCAG large text: AAA
Contrast with black, large text1.18:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 17.2Dark slateblue · ΔE 23.7Rebecca purple · ΔE 32.3Indigo · ΔE 33.8Navy · ΔE 36.8Purple · ΔE 39.6
Nearest named CSS colourMidnight blue (#191970)ΔE 17.19, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3B480B
Analogous#0B1C48, #360B48
Triadic#48180B, #0B4818
Split complementary#48370B, #1C480B
Tetradic#480B1C, #3B480B, #0B4837

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#603EE1
Lighter +30%#441FCD
Lighter +20%#3519A0
Lighter +10%#271274
Darker −10%#09041C
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#120152
Less saturated −25%#1E153E

Channel breakdown

R24
G11
B72
Red24 (9.4%)
Green11 (4.3%)
Blue72 (28.2%)
Hue252.79°
Saturation (HSL)73.49%
Lightness16.27%
Dominant channelBlue
Hex per channelR 18 · G 0B · B 48

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Every value on this page was computed from “180b48” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.