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Colour

#1B4DE3

  • #1B4DE3
  • Blue
  • Dark
  • Nearest: Medium slateblue

#1B4DE3 is a blue with RGB values 27, 77, 227 and HSL 225°, 79%, 50%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#1B4DE3#1B4DE3
HEX#1B4DE3
RGBrgb(27, 77, 227)
RGB (0–1)0.1059, 0.302, 0.8902
RGB percentages10.6%, 30.2%, 89%
HSLhsl(225, 78.7%, 49.8%)
HSV / HSBhsv(225, 88.1%, 89%)
CMYK88.1%, 66.1%, 0%, 11%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,789,411
CSS custom property--colour: #1B4DE3;

Brightness & contrast

Relative luminance0.11087WCAG 2.x, 0 is black and 1 is white
Perceived brightness97.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.53:1
Contrast with white6.53:1WCAG normal text: AA
Contrast with black3.22:1WCAG normal text: Fail
Greyscale equivalent#4D4D4D
Inverted#E4B21C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0067E8no red cones; affects about 1% of men; ΔE 18.8 from the original
Deuteranopia#0054E0no green cones; the most common form, about 1% of men; ΔE 7.4 from the original
Tritanopia#007691no blue cones; rare, and affects men and women equally; ΔE 82.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.53:1WCAG large text: AAA
Contrast with black, large text3.22:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 18.9Royal blue · ΔE 22.4Slate blue · ΔE 23.2Dark blue · ΔE 28.8Blue violet · ΔE 29Dark orchid · ΔE 31.1
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 18.95, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#E3B11B
Analogous#1BB1E3, #4D1BE3
Triadic#E31B4D, #4DE31B
Split complementary#E34D1B, #B1E31B
Tetradic#E31BB1, #E3B11B, #1BE34D

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D1DBF9
Lighter +30%#A3B7F4
Lighter +20%#7594EF
Lighter +10%#4870E9
Darker −10%#163EB5
Darker −20%#102E88
Darker −30%#0B1F5A
Darker −40%#050F2D
More saturated +25%#003FFE
Less saturated −25%#3B5DC3

Channel breakdown

R27
G77
B227
Red27 (10.6%)
Green77 (30.2%)
Blue227 (89%)
Hue225°
Saturation (HSL)78.74%
Lightness49.8%
Dominant channelBlue
Hex per channelR 1B · G 4D · B E3

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Every value on this page was computed from “1b4de3” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.