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Recognised as Colour

#1B64BB

  • #1B64BB
  • Blue
  • Dark
  • Nearest: Cornflower blue

#1B64BB is a blue with RGB values 27, 100, 187 and HSL 213°, 75%, 42%. It is a dark colour, so white text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#1B64BB#1B64BB
HEX#1B64BB
RGBrgb(27, 100, 187)
RGB (0–1)0.1059, 0.3922, 0.7333
RGB percentages10.6%, 39.2%, 73.3%
HSLhsl(212.6, 74.8%, 42%)
HSV / HSBhsv(212.6, 85.6%, 73.3%)
CMYK85.6%, 46.5%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,795,259
CSS custom property--colour: #1B64BB;

Brightness & contrast

Relative luminance0.12935WCAG 2.x, 0 is black and 1 is white
Perceived brightness100.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.85:1
Contrast with white5.85:1WCAG normal text: AA
Contrast with black3.59:1WCAG normal text: Fail
Greyscale equivalent#5B5B5B
Inverted#E49B44

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#346CBEno red cones; affects about 1% of men; ΔE 4.9 from the original
Deuteranopia#015EB9no green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#007986no blue cones; rare, and affects men and women equally; ΔE 50.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.85:1WCAG large text: AAA
Contrast with black, large text3.59:1WCAG large text: AA

Named colours

Cornflower blue · ΔE 19.5Dodgerblue · ΔE 20.3Royal blue · ΔE 20.9Dark slateblue · ΔE 21.5Slate blue · ΔE 25.8Steel blue · ΔE 26.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 19.51, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB721B
Analogous#1BB4BB, #221BBB
Triadic#BB1B64, #64BB1B
Split complementary#BB221B, #B4BB1B
Tetradic#BB1BB4, #BB721B, #1BBB22

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#AFCEF3
Lighter +30%#82B3ED
Lighter +20%#5598E7
Lighter +10%#297CE0
Darker −10%#154C8E
Darker −20%#0E3462
Darker −30%#081D35
Darker −40%#010509
More saturated +25%#0062D6
Less saturated −25%#3666A0

Channel breakdown

R27
G100
B187
Red27 (10.6%)
Green100 (39.2%)
Blue187 (73.3%)
Hue212.63°
Saturation (HSL)74.77%
Lightness41.96%
Dominant channelBlue
Hex per channelR 1B · G 64 · B BB

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Every value on this page was computed from “1b64bb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.