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Colour

#153F74

  • #153F74
  • Blue
  • Dark
  • Nearest: Dark slateblue

#153F74 is a blue with RGB values 21, 63, 116 and HSL 213°, 69%, 27%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#153F74#153F74
HEX#153F74
RGBrgb(21, 63, 116)
RGB (0–1)0.0824, 0.2471, 0.4549
RGB percentages8.2%, 24.7%, 45.5%
HSLhsl(213.5, 69.3%, 26.9%)
HSV / HSBhsv(213.5, 81.9%, 45.5%)
CMYK81.9%, 45.7%, 0%, 54.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,392,500
CSS custom property--colour: #153F74;

Brightness & contrast

Relative luminance0.04975WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.53:1
Contrast with white10.53:1WCAG normal text: AAA
Contrast with black2:1WCAG normal text: Fail
Greyscale equivalent#3A3A3A
Inverted#EAC08B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#244476no red cones; affects about 1% of men; ΔE 3.3 from the original
Deuteranopia#113B73no green cones; the most common form, about 1% of men; ΔE 2.9 from the original
Tritanopia#004C53no blue cones; rare, and affects men and women equally; ΔE 34.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.53:1WCAG large text: AAA
Contrast with black, large text2:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.5Steel blue · ΔE 27.9Midnight blue · ΔE 31.4Dark slate grey · ΔE 36.1Slate grey · ΔE 36.5Cornflower blue · ΔE 38.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.46, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#744A15
Analogous#156F74, #1A1574
Triadic#74153F, #3F7415
Split complementary#741A15, #6F7415
Tetradic#74156F, #744A15, #15741A

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#70A4E5
Lighter +30%#4588DD
Lighter +20%#256ECA
Lighter +10%#1D569F
Darker −10%#0D2849
Darker −20%#05101E
Darker −30%#000000
Darker −40%#000000
More saturated +25%#043D85
Less saturated −25%#264163

Channel breakdown

R21
G63
B116
Red21 (8.2%)
Green63 (24.7%)
Blue116 (45.5%)
Hue213.47°
Saturation (HSL)69.34%
Lightness26.86%
Dominant channelBlue
Hex per channelR 15 · G 3F · B 74

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Every value on this page was computed from “153f74” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.