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Recognised as Colour

#1B156B

  • #1B156B
  • Blue
  • Dark
  • Nearest: Midnight blue

#1B156B is a blue with RGB values 27, 21, 107 and HSL 244°, 67%, 25%. It is a dark colour, so white text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#1B156B#1B156B
HEX#1B156B
RGBrgb(27, 21, 107)
RGB (0–1)0.1059, 0.0824, 0.4196
RGB percentages10.6%, 8.2%, 42%
HSLhsl(244.2, 67.2%, 25.1%)
HSV / HSBhsv(244.2, 80.4%, 42%)
CMYK74.8%, 80.4%, 0%, 58%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,774,955
CSS custom property--colour: #1B156B;

Brightness & contrast

Relative luminance0.01831WCAG 2.x, 0 is black and 1 is white
Perceived brightness42.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.37:1
Contrast with white15.37:1WCAG normal text: AAA
Contrast with black1.37:1WCAG normal text: Fail
Greyscale equivalent#1C1C1C
Inverted#E4EA94

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#00296Dno red cones; affects about 1% of men; ΔE 16.7 from the original
Deuteranopia#002169no green cones; the most common form, about 1% of men; ΔE 11.7 from the original
Tritanopia#002E3Fno blue cones; rare, and affects men and women equally; ΔE 52.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text15.37:1WCAG large text: AAA
Contrast with black, large text1.37:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 1.9Dark slateblue · ΔE 18.6Indigo · ΔE 20.6Rebecca purple · ΔE 21.1Navy · ΔE 22.2Dark blue · ΔE 27
Nearest named CSS colourMidnight blue (#191970)ΔE 1.91, below the just-noticeable difference
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#656B15
Analogous#153A6B, #46156B
Triadic#6B1B15, #156B1B
Split complementary#6B4615, #3A6B15
Tetradic#6B153A, #656B15, #156B46

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#736AE2
Lighter +30%#4A40D9
Lighter +20%#3126C0
Lighter +10%#261D96
Darker −10%#100D40
Darker −20%#050416
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D057B
Less saturated −25%#29255B

Channel breakdown

R27
G21
B107
Red27 (10.6%)
Green21 (8.2%)
Blue107 (42%)
Hue244.19°
Saturation (HSL)67.19%
Lightness25.1%
Dominant channelBlue
Hex per channelR 1B · G 15 · B 6B

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Every value on this page was computed from “1b156b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.