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Colour

#1B54BB

  • #1B54BB
  • Blue
  • Dark
  • Nearest: Royal blue

#1B54BB is a blue with RGB values 27, 84, 187 and HSL 219°, 75%, 42%. It is a dark colour, so white text on it reaches 6.9:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1B54BB#1B54BB
HEX#1B54BB
RGBrgb(27, 84, 187)
RGB (0–1)0.1059, 0.3294, 0.7333
RGB percentages10.6%, 32.9%, 73.3%
HSLhsl(218.6, 74.8%, 42%)
HSV / HSBhsv(218.6, 85.6%, 73.3%)
CMYK85.6%, 55.1%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,791,163
CSS custom property--colour: #1B54BB;

Brightness & contrast

Relative luminance0.10162WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.93:1
Contrast with white6.93:1WCAG normal text: AA
Contrast with black3.03:1WCAG normal text: Fail
Greyscale equivalent#4F4F4F
Inverted#E4AB44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0061BFno red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#0053B9no green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#006E7Fno blue cones; rare, and affects men and women equally; ΔE 59.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.93:1WCAG large text: AAA
Contrast with black, large text3.03:1WCAG large text: AA

Named colours

Royal blue · ΔE 12.4Slate blue · ΔE 16.2Dark slateblue · ΔE 19.2Medium purple · ΔE 24.5Dodgerblue · ΔE 24.6Medium slateblue · ΔE 24.8
Nearest named CSS colourRoyal blue (#4169E1)ΔE 12.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB821B
Analogous#1BA4BB, #321BBB
Triadic#BB1B54, #54BB1B
Split complementary#BB321B, #A4BB1B
Tetradic#BB1BA4, #BB821B, #1BBB32

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFC7F3
Lighter +30%#82A8ED
Lighter +20%#5589E7
Lighter +10%#296AE0
Darker −10%#15408E
Darker −20%#0E2C62
Darker −30%#081835
Darker −40%#010409
More saturated +25%#004CD6
Less saturated −25%#365CA0

Channel breakdown

R27
G84
B187
Red27 (10.6%)
Green84 (32.9%)
Blue187 (73.3%)
Hue218.63°
Saturation (HSL)74.77%
Lightness41.96%
Dominant channelBlue
Hex per channelR 1B · G 54 · B BB

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Every value on this page was computed from “1b54bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.