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Recognised as Colour

#1B45DF

  • #1B45DF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#1B45DF is a blue with RGB values 27, 69, 223 and HSL 227°, 78%, 49%. It is a dark colour, so white text on it reaches 7.1:1 contrast (AAA for normal text). The nearest named colour is Medium slateblue.

Colour values

#1B45DF#1B45DF
HEX#1B45DF
RGBrgb(27, 69, 223)
RGB (0–1)0.1059, 0.2706, 0.8745
RGB percentages10.6%, 27.1%, 87.5%
HSLhsl(227.1, 78.4%, 49%)
HSV / HSBhsv(227.1, 87.9%, 87.5%)
CMYK87.9%, 69.1%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,787,359
CSS custom property--colour: #1B45DF;

Brightness & contrast

Relative luminance0.09817WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.09:1
Contrast with white7.09:1WCAG normal text: AAA
Contrast with black2.96:1WCAG normal text: Fail
Greyscale equivalent#474747
Inverted#E4BA20

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0062E4no red cones; affects about 1% of men; ΔE 20.9 from the original
Deuteranopia#004FDCno green cones; the most common form, about 1% of men; ΔE 9.5 from the original
Tritanopia#00708Dno blue cones; rare, and affects men and women equally; ΔE 83.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.09:1WCAG large text: AAA
Contrast with black, large text2.96:1WCAG large text: Fail

Named colours

Medium slateblue · ΔE 21.8Slate blue · ΔE 26.1Blue violet · ΔE 26.2Royal blue · ΔE 26.5Dark blue · ΔE 26.5Medium blue · ΔE 27.7
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 21.77, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DFB51B
Analogous#1BA7DF, #531BDF
Triadic#DF1B45, #45DF1B
Split complementary#DF531B, #A7DF1B
Tetradic#DF1BA7, #DFB51B, #1BDF53

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CDD6F9
Lighter +30%#A0B2F3
Lighter +20%#728DEE
Lighter +10%#4568E8
Darker −10%#1537B2
Darker −20%#102984
Darker −30%#0A1B57
Darker −40%#050D29
More saturated +25%#0036FA
Less saturated −25%#3A57C0

Channel breakdown

R27
G69
B223
Red27 (10.6%)
Green69 (27.1%)
Blue223 (87.5%)
Hue227.14°
Saturation (HSL)78.4%
Lightness49.02%
Dominant channelBlue
Hex per channelR 1B · G 45 · B DF

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Every value on this page was computed from “1b45df” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.