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Colour

#0045B5

  • #0045B5
  • Blue
  • Dark
  • Nearest: Royal blue

#0045B5 is a blue with RGB values 0, 69, 181 and HSL 217°, 100%, 35%. It is a dark colour, so white text on it reaches 8.3:1 contrast (AAA for normal text). The nearest named colour is Royal blue.

Colour values

#0045B5#0045B5
HEX#0045B5
RGBrgb(0, 69, 181)
RGB (0–1)0, 0.2706, 0.7098
RGB percentages0%, 27.1%, 71%
HSLhsl(217.1, 100%, 35.5%)
HSV / HSBhsv(217.1, 100%, 71%)
CMYK100%, 61.9%, 0%, 29%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer17,845
CSS custom property--colour: #0045B5;

Brightness & contrast

Relative luminance0.07592WCAG 2.x, 0 is black and 1 is white
Perceived brightness80.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.34:1
Contrast with white8.34:1WCAG normal text: AAA
Contrast with black2.52:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#FFBA4A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0056B9no red cones; affects about 1% of men; ΔE 12.5 from the original
Deuteranopia#0046B3no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#006376no blue cones; rare, and affects men and women equally; ΔE 64.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.34:1WCAG large text: AAA
Contrast with black, large text2.52:1WCAG large text: Fail

Named colours

Royal blue · ΔE 14.9Slate blue · ΔE 15.9Dark slateblue · ΔE 22Rebecca purple · ΔE 22.4Midnight blue · ΔE 22.7Medium slateblue · ΔE 23.2
Nearest named CSS colourRoyal blue (#4169E1)ΔE 14.87, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B57000
Analogous#009FB5, #1600B5
Triadic#B50045, #45B500
Split complementary#B51600, #9FB500
Tetradic#B5009F, #B57000, #00B516

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#82B2FF
Lighter +30%#4F92FF
Lighter +20%#1C73FF
Lighter +10%#0058E8
Darker −10%#003282
Darker −20%#001E4F
Darker −30%#000B1C
Darker −40%#000000
More saturated +25%#0045B5
Less saturated −25%#174A9E

Channel breakdown

R0
G69
B181
Red0 (0%)
Green69 (27.1%)
Blue181 (71%)
Hue217.13°
Saturation (HSL)100%
Lightness35.49%
Dominant channelBlue
Hex per channelR 00 · G 45 · B B5

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Every value on this page was computed from “0045b5” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.