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Recognised as Colour

#153F54

  • #153F54
  • Blue
  • Dark
  • Nearest: Dark slate grey

#153F54 is a blue with RGB values 21, 63, 84 and HSL 200°, 60%, 21%. It is a dark colour, so white text on it reaches 11.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#153F54#153F54
HEX#153F54
RGBrgb(21, 63, 84)
RGB (0–1)0.0824, 0.2471, 0.3294
RGB percentages8.2%, 24.7%, 32.9%
HSLhsl(200, 60%, 20.6%)
HSV / HSBhsv(200, 75%, 32.9%)
CMYK75%, 25%, 0%, 67.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,392,468
CSS custom property--colour: #153F54;

Brightness & contrast

Relative luminance0.04355WCAG 2.x, 0 is black and 1 is white
Perceived brightness57.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.22:1
Contrast with white11.22:1WCAG normal text: AAA
Contrast with black1.87:1WCAG normal text: Fail
Greyscale equivalent#383838
Inverted#EAC0AB

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#353E55no red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#2C3854no green cones; the most common form, about 1% of men; ΔE 10.5 from the original
Tritanopia#004546no blue cones; rare, and affects men and women equally; ΔE 16 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.22:1WCAG large text: AAA
Contrast with black, large text1.87:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 15.5Dim grey · ΔE 26.7Slate grey · ΔE 29.1Black · ΔE 30.7Steel blue · ΔE 31.7Light slate grey · ΔE 31.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 15.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#542A15
Analogous#15544A, #151F54
Triadic#54153F, #3F5415
Split complementary#541520, #544A15
Tetradic#491554, #542A15, #205415

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5EAFD7
Lighter +30%#359ACD
Lighter +20%#297CA6
Lighter +10%#1F5E7D
Darker −10%#0B202B
Darker −20%#010202
Darker −30%#000000
Darker −40%#000000
More saturated +25%#084361
Less saturated −25%#223B47

Channel breakdown

R21
G63
B84
Red21 (8.2%)
Green63 (24.7%)
Blue84 (32.9%)
Hue200°
Saturation (HSL)60%
Lightness20.59%
Dominant channelBlue
Hex per channelR 15 · G 3F · B 54

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Every value on this page was computed from “153f54” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.