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Recognised as Colour

#1D509F

  • #1D509F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D509F is a blue with RGB values 29, 80, 159 and HSL 216°, 69%, 37%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1D509F#1D509F
HEX#1D509F
RGBrgb(29, 80, 159)
RGB (0–1)0.1137, 0.3137, 0.6235
RGB percentages11.4%, 31.4%, 62.4%
HSLhsl(216.5, 69.1%, 36.9%)
HSV / HSBhsv(216.5, 81.8%, 62.4%)
CMYK81.8%, 49.7%, 0%, 37.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,921,183
CSS custom property--colour: #1D509F;

Brightness & contrast

Relative luminance0.08502WCAG 2.x, 0 is black and 1 is white
Perceived brightness83 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.78:1
Contrast with white7.78:1WCAG normal text: AAA
Contrast with black2.7:1WCAG normal text: Fail
Greyscale equivalent#4B4B4B
Inverted#E2AF60

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2159A2no red cones; affects about 1% of men; ΔE 6.1 from the original
Deuteranopia#004D9Dno green cones; the most common form, about 1% of men; ΔE 2.2 from the original
Tritanopia#006370no blue cones; rare, and affects men and women equally; ΔE 46.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.78:1WCAG large text: AAA
Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.6Royal blue · ΔE 25.4Midnight blue · ΔE 26.7Slate blue · ΔE 27Cornflower blue · ΔE 27.3Steel blue · ΔE 29.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.56, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9F6C1D
Analogous#1D919F, #2B1D9F
Triadic#9F1D50, #509F1D
Split complementary#9F2B1D, #919F1D
Tetradic#9F1D91, #9F6C1D, #1D9F2B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9BBBED
Lighter +30%#709EE5
Lighter +20%#4581DD
Lighter +10%#2566CA
Darker −10%#153A74
Darker −20%#0D2549
Darker −30%#050F1E
Darker −40%#000000
More saturated +25%#064BB7
Less saturated −25%#355588

Channel breakdown

R29
G80
B159
Red29 (11.4%)
Green80 (31.4%)
Blue159 (62.4%)
Hue216.46°
Saturation (HSL)69.15%
Lightness36.86%
Dominant channelBlue
Hex per channelR 1D · G 50 · B 9F

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Every value on this page was computed from “1d509f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.