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Recognised as Colour

#1B138A

  • #1B138A
  • Blue
  • Dark
  • Nearest: Navy

#1B138A is a blue with RGB values 27, 19, 138 and HSL 244°, 76%, 31%. It is a dark colour, so white text on it reaches 13.9:1 contrast (AAA for normal text). The nearest named colour is Navy.

Colour values

#1B138A#1B138A
HEX#1B138A
RGBrgb(27, 19, 138)
RGB (0–1)0.1059, 0.0745, 0.5412
RGB percentages10.6%, 7.5%, 54.1%
HSLhsl(244, 75.8%, 30.8%)
HSV / HSBhsv(244, 86.2%, 54.1%)
CMYK80.4%, 86.2%, 0%, 45.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,774,474
CSS custom property--colour: #1B138A;

Brightness & contrast

Relative luminance0.02534WCAG 2.x, 0 is black and 1 is white
Perceived brightness51 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.94:1
Contrast with white13.94:1WCAG normal text: AAA
Contrast with black1.51:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#E4EC75

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00328Dno red cones; affects about 1% of men; ΔE 21.9 from the original
Deuteranopia#002688no green cones; the most common form, about 1% of men; ΔE 14.3 from the original
Tritanopia#003A51no blue cones; rare, and affects men and women equally; ΔE 67.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.94:1WCAG large text: AAA
Contrast with black, large text1.51:1WCAG large text: Fail

Named colours

Navy · ΔE 6.7Dark blue · ΔE 9.6Indigo · ΔE 12.3Midnight blue · ΔE 17.8Rebecca purple · ΔE 21.4Slate blue · ΔE 28.7
Nearest named CSS colourNavy (#000080)ΔE 6.66, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#828A13
Analogous#13478A, #56138A
Triadic#8A1B13, #138A1B
Split complementary#8A5613, #478A13
Tetradic#8A1347, #828A13, #138A56

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#847CED
Lighter +30%#594FE7
Lighter +20%#2F22E1
Lighter +10%#2419B7
Darker −10%#120D5D
Darker −20%#090730
Darker −30%#010004
Darker −40%#000000
More saturated +25%#0B009D
Less saturated −25%#2C2776

Channel breakdown

R27
G19
B138
Red27 (10.6%)
Green19 (7.5%)
Blue138 (54.1%)
Hue244.03°
Saturation (HSL)75.8%
Lightness30.78%
Dominant channelBlue
Hex per channelR 1B · G 13 · B 8A

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Every value on this page was computed from “1b138a” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.