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Recognised as Colour

#0B2155

  • #0B2155
  • Blue
  • Dark
  • Nearest: Dark slateblue

#0B2155 is a blue with RGB values 11, 33, 85 and HSL 222°, 77%, 19%. It is a dark colour, so white text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#0B2155#0B2155
HEX#0B2155
RGBrgb(11, 33, 85)
RGB (0–1)0.0431, 0.1294, 0.3333
RGB percentages4.3%, 12.9%, 33.3%
HSLhsl(222.2, 77.1%, 18.8%)
HSV / HSBhsv(222.2, 87.1%, 33.3%)
CMYK87.1%, 61.2%, 0%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer729,429
CSS custom property--colour: #0B2155;

Brightness & contrast

Relative luminance0.01815WCAG 2.x, 0 is black and 1 is white
Perceived brightness38.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.41:1
Contrast with white15.41:1WCAG normal text: AAA
Contrast with black1.36:1WCAG normal text: Fail
Greyscale equivalent#202020
Inverted#F4DEAA

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002857no red cones; affects about 1% of men; ΔE 6.3 from the original
Deuteranopia#002154no green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#002E37no blue cones; rare, and affects men and women equally; ΔE 34.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.41:1WCAG large text: AAA
Contrast with black, large text1.36:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 22Midnight blue · ΔE 23.9Rebecca purple · ΔE 37Black · ΔE 39.4Steel blue · ΔE 42Dark slate grey · ΔE 42.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 22.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#553F0B
Analogous#0B4655, #1A0B55
Triadic#550B21, #21550B
Split complementary#551A0B, #46550B
Tetradic#550B46, #553F0B, #0B551A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4575E7
Lighter +30%#1D56DC
Lighter +20%#1744AF
Lighter +10%#113382
Darker −10%#050F28
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#001D60
Less saturated −25%#172649

Channel breakdown

R11
G33
B85
Red11 (4.3%)
Green33 (12.9%)
Blue85 (33.3%)
Hue222.16°
Saturation (HSL)77.08%
Lightness18.82%
Dominant channelBlue
Hex per channelR 0B · G 21 · B 55

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Every value on this page was computed from “0b2155” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.