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Recognised as Colour

#1D37DA

  • #1D37DA
  • Blue
  • Dark
  • Nearest: Medium blue

#1D37DA is a blue with RGB values 29, 55, 218 and HSL 232°, 77%, 48%. It is a dark colour, so white text on it reaches 8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#1D37DA#1D37DA
HEX#1D37DA
RGBrgb(29, 55, 218)
RGB (0–1)0.1137, 0.2157, 0.8549
RGB percentages11.4%, 21.6%, 85.5%
HSLhsl(231.7, 76.5%, 48.4%)
HSV / HSBhsv(231.7, 86.7%, 85.5%)
CMYK86.7%, 74.8%, 0%, 14.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,842
CSS custom property--colour: #1D37DA;

Brightness & contrast

Relative luminance0.08056WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.04:1
Contrast with white8.04:1WCAG normal text: AAA
Contrast with black2.61:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#E2C825

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0059DFno red cones; affects about 1% of men; ΔE 23.8 from the original
Deuteranopia#0047D7no green cones; the most common form, about 1% of men; ΔE 13.3 from the original
Tritanopia#006886no blue cones; rare, and affects men and women equally; ΔE 89 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.04:1WCAG large text: AAA
Contrast with black, large text2.61:1WCAG large text: Fail

Named colours

Medium blue · ΔE 19.8Blue violet · ΔE 22.1Dark blue · ΔE 24.6Medium slateblue · ΔE 27.8Navy · ΔE 28.8Dark violet · ΔE 28.9
Nearest named CSS colourMedium blue (#0000CD)ΔE 19.78, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DAC01D
Analogous#1D95DA, #621DDA
Triadic#DA1D37, #37DA1D
Split complementary#DA621D, #95DA1D
Tetradic#DA1D95, #DAC01D, #1DDA61

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#CBD1F8
Lighter +30%#9EA9F2
Lighter +20%#7182EC
Lighter +10%#445AE6
Darker −10%#172CAD
Darker −20%#112080
Darker −30%#0B1553
Darker −40%#050A26
More saturated +25%#0022F7
Less saturated −25%#3C4DBB

Channel breakdown

R29
G55
B218
Red29 (11.4%)
Green55 (21.6%)
Blue218 (85.5%)
Hue231.75°
Saturation (HSL)76.52%
Lightness48.43%
Dominant channelBlue
Hex per channelR 1D · G 37 · B DA

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Every value on this page was computed from “1d37da” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.