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Recognised as Colour

#045DB4

  • #045DB4
  • Blue
  • Dark
  • Nearest: Dark slateblue

#045DB4 is a blue with RGB values 4, 93, 180 and HSL 210°, 96%, 36%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Dark slateblue.

Colour values

#045DB4#045DB4
HEX#045DB4
RGBrgb(4, 93, 180)
RGB (0–1)0.0157, 0.3647, 0.7059
RGB percentages1.6%, 36.5%, 70.6%
HSLhsl(209.7, 95.7%, 36.1%)
HSV / HSBhsv(209.7, 97.8%, 70.6%)
CMYK97.8%, 48.3%, 0%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer286,132
CSS custom property--colour: #045DB4;

Brightness & contrast

Relative luminance0.1115WCAG 2.x, 0 is black and 1 is white
Perceived brightness93.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.5:1
Contrast with white6.5:1WCAG normal text: AA
Contrast with black3.23:1WCAG normal text: Fail
Greyscale equivalent#505050
Inverted#FBA24B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2965B7no red cones; affects about 1% of men; ΔE 4.9 from the original
Deuteranopia#0057B2no green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#007280no blue cones; rare, and affects men and women equally; ΔE 49.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.5:1WCAG large text: AAA
Contrast with black, large text3.23:1WCAG large text: AA

Named colours

Dark slateblue · ΔE 19.9Royal blue · ΔE 21.1Cornflower blue · ΔE 22.4Dodgerblue · ΔE 22.5Slate blue · ΔE 25.7Steel blue · ΔE 28.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 19.91, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B45B04
Analogous#04B4B3, #0405B4
Triadic#B4045D, #5DB404
Split complementary#B40405, #B4B304
Tetradic#B304B4, #B45B04, #05B404

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#88C3FC
Lighter +30%#56A9FB
Lighter +20%#2490FA
Lighter +10%#0577E6
Darker −10%#034382
Darker −20%#022950
Darker −30%#01101E
Darker −40%#000000
More saturated +25%#005DB8
Less saturated −25%#1B5D9D

Channel breakdown

R4
G93
B180
Red4 (1.6%)
Green93 (36.5%)
Blue180 (70.6%)
Hue209.66°
Saturation (HSL)95.65%
Lightness36.08%
Dominant channelBlue
Hex per channelR 04 · G 5D · B B4

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Every value on this page was computed from “045db4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.