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Colour

#1B39BD

  • #1B39BD
  • Blue
  • Dark
  • Nearest: Slate blue

#1B39BD is a blue with RGB values 27, 57, 189 and HSL 229°, 75%, 42%. It is a dark colour, so white text on it reaches 8.9:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#1B39BD#1B39BD
HEX#1B39BD
RGBrgb(27, 57, 189)
RGB (0–1)0.1059, 0.2235, 0.7412
RGB percentages10.6%, 22.4%, 74.1%
HSLhsl(228.9, 75%, 42.4%)
HSV / HSBhsv(228.9, 85.7%, 74.1%)
CMYK85.7%, 69.8%, 0%, 25.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,784,253
CSS custom property--colour: #1B39BD;

Brightness & contrast

Relative luminance0.06833WCAG 2.x, 0 is black and 1 is white
Perceived brightness78.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.87:1
Contrast with white8.87:1WCAG normal text: AAA
Contrast with black2.37:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#E4C642

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0052C1no red cones; affects about 1% of men; ΔE 18.8 from the original
Deuteranopia#0042BBno green cones; the most common form, about 1% of men; ΔE 8.6 from the original
Tritanopia#005E77no blue cones; rare, and affects men and women equally; ΔE 74.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.87:1WCAG large text: AAA
Contrast with black, large text2.37:1WCAG large text: Fail

Named colours

Slate blue · ΔE 19.8Dark blue · ΔE 19.9Navy · ΔE 21Medium slateblue · ΔE 21.6Royal blue · ΔE 22.2Indigo · ΔE 24.1
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 19.85, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BD9F1B
Analogous#1B8ABD, #4E1BBD
Triadic#BD1B39, #39BD1B
Split complementary#BD4E1B, #8ABD1B
Tetradic#BD1B8A, #BD9F1B, #1BBD4E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B0BDF4
Lighter +30%#8497ED
Lighter +20%#5772E7
Lighter +10%#2A4CE1
Darker −10%#152C90
Darker −20%#0E1E64
Darker −30%#081137
Darker −40%#02030A
More saturated +25%#0028D8
Less saturated −25%#364AA2

Channel breakdown

R27
G57
B189
Red27 (10.6%)
Green57 (22.4%)
Blue189 (74.1%)
Hue228.89°
Saturation (HSL)75%
Lightness42.35%
Dominant channelBlue
Hex per channelR 1B · G 39 · B BD

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Every value on this page was computed from “1b39bd” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.