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Recognised as Colour

#1D3761

  • #1D3761
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D3761 is a blue with RGB values 29, 55, 97 and HSL 217°, 54%, 25%. It is a dark colour, so white text on it reaches 11.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1D3761#1D3761
HEX#1D3761
RGBrgb(29, 55, 97)
RGB (0–1)0.1137, 0.2157, 0.3804
RGB percentages11.4%, 21.6%, 38%
HSLhsl(217.1, 54%, 24.7%)
HSV / HSBhsv(217.1, 70.1%, 38%)
CMYK70.1%, 43.3%, 0%, 62%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,721
CSS custom property--colour: #1D3761;

Brightness & contrast

Relative luminance0.03857WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.86:1
Contrast with white11.86:1WCAG normal text: AAA
Contrast with black1.77:1WCAG normal text: Fail
Greyscale equivalent#353535
Inverted#E2C89E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#243B63no red cones; affects about 1% of men; ΔE 2.4 from the original
Deuteranopia#1A3460no green cones; the most common form, about 1% of men; ΔE 2.1 from the original
Tritanopia#004147no blue cones; rare, and affects men and women equally; ΔE 28.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.86:1WCAG large text: AAA
Contrast with black, large text1.77:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 26.2Dark slate grey · ΔE 30.7Steel blue · ΔE 31.1Midnight blue · ΔE 34.9Slate grey · ΔE 35.2Dim grey · ΔE 35.5
Nearest named CSS colourDark slateblue (#483D8B)ΔE 26.18, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#61471D
Analogous#1D5961, #251D61
Triadic#611D37, #37611D
Split complementary#61251D, #59611D
Tetradic#611D59, #61471D, #1D6125

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#749AD6
Lighter +30%#4D7DCA
Lighter +20%#3464B0
Lighter +10%#294D88
Darker −10%#11213A
Darker −20%#060A12
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0D3371
Less saturated −25%#2D3B51

Channel breakdown

R29
G55
B97
Red29 (11.4%)
Green55 (21.6%)
Blue97 (38%)
Hue217.06°
Saturation (HSL)53.97%
Lightness24.71%
Dominant channelBlue
Hex per channelR 1D · G 37 · B 61

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Every value on this page was computed from “1d3761” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.