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Recognised as Colour

#1B3E89

  • #1B3E89
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1B3E89 is a blue with RGB values 27, 62, 137 and HSL 221°, 67%, 32%. It is a dark colour, so white text on it reaches 10:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1B3E89#1B3E89
HEX#1B3E89
RGBrgb(27, 62, 137)
RGB (0–1)0.1059, 0.2431, 0.5373
RGB percentages10.6%, 24.3%, 53.7%
HSLhsl(220.9, 67.1%, 32.2%)
HSV / HSBhsv(220.9, 80.3%, 53.7%)
CMYK80.3%, 54.7%, 0%, 46.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,785,481
CSS custom property--colour: #1B3E89;

Brightness & contrast

Relative luminance0.05484WCAG 2.x, 0 is black and 1 is white
Perceived brightness67.9 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.01:1
Contrast with white10.01:1WCAG normal text: AAA
Contrast with black2.1:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#E4C176

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#04488Cno red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#003D88no green cones; the most common form, about 1% of men; ΔE 2.3 from the original
Tritanopia#00505Dno blue cones; rare, and affects men and women equally; ΔE 45.5 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.01:1WCAG large text: AAA
Contrast with black, large text2.1:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 10.5Midnight blue · ΔE 20Rebecca purple · ΔE 26.9Slate blue · ΔE 28.9Royal blue · ΔE 29.7Medium purple · ΔE 34
Nearest named CSS colourDark slateblue (#483D8B)ΔE 10.52, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#89661B
Analogous#1B7589, #2F1B89
Triadic#891B3E, #3E891B
Split complementary#892F1B, #75891B
Tetradic#891B75, #89661B, #1B892F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#88A7E8
Lighter +30%#5E87DF
Lighter +20%#3367D7
Lighter +10%#2351B4
Darker −10%#132B5E
Darker −20%#0A1734
Darker −30%#020409
Darker −40%#000000
More saturated +25%#06379E
Less saturated −25%#2F4574

Channel breakdown

R27
G62
B137
Red27 (10.6%)
Green62 (24.3%)
Blue137 (53.7%)
Hue220.91°
Saturation (HSL)67.07%
Lightness32.16%
Dominant channelBlue
Hex per channelR 1B · G 3E · B 89

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Every value on this page was computed from “1b3e89” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.