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Recognised as Colour

#1B1389

  • #1B1389
  • Blue
  • Dark
  • Nearest: Navy

#1B1389 is a blue with RGB values 27, 19, 137 and HSL 244°, 76%, 31%. It is a dark colour, so white text on it reaches 14:1 contrast (AAA for normal text). The nearest named colour is Navy.

Colour values

#1B1389#1B1389
HEX#1B1389
RGBrgb(27, 19, 137)
RGB (0–1)0.1059, 0.0745, 0.5373
RGB percentages10.6%, 7.5%, 53.7%
HSLhsl(244.1, 75.6%, 30.6%)
HSV / HSBhsv(244.1, 86.1%, 53.7%)
CMYK80.3%, 86.1%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,774,473
CSS custom property--colour: #1B1389;

Brightness & contrast

Relative luminance0.02505WCAG 2.x, 0 is black and 1 is white
Perceived brightness50.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.99:1
Contrast with white13.99:1WCAG normal text: AAA
Contrast with black1.5:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#E4EC76

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00318Cno red cones; affects about 1% of men; ΔE 21.1 from the original
Deuteranopia#002687no green cones; the most common form, about 1% of men; ΔE 14.4 from the original
Tritanopia#003A50no blue cones; rare, and affects men and women equally; ΔE 67.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.99:1WCAG large text: AAA
Contrast with black, large text1.5:1WCAG large text: Fail

Named colours

Navy · ΔE 6.9Dark blue · ΔE 10.1Indigo · ΔE 12.3Midnight blue · ΔE 17.3Rebecca purple · ΔE 21.2Slate blue · ΔE 28.7
Nearest named CSS colourNavy (#000080)ΔE 6.89, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#818913
Analogous#134689, #561389
Triadic#891B13, #13891B
Split complementary#895613, #468913
Tetradic#891346, #818913, #138956

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#837BED
Lighter +30%#594EE7
Lighter +20%#2F22E0
Lighter +10%#2419B6
Darker −10%#120D5C
Darker −20%#09072F
Darker −30%#010003
Darker −40%#000000
More saturated +25%#0B009C
Less saturated −25%#2C2775

Channel breakdown

R27
G19
B137
Red27 (10.6%)
Green19 (7.5%)
Blue137 (53.7%)
Hue244.07°
Saturation (HSL)75.64%
Lightness30.59%
Dominant channelBlue
Hex per channelR 1B · G 13 · B 89

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Every value on this page was computed from “1b1389” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.