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Recognised as Colour

#1D3370

  • #1D3370
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1D3370 is a blue with RGB values 29, 51, 112 and HSL 224°, 59%, 28%. 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

#1D3370#1D3370
HEX#1D3370
RGBrgb(29, 51, 112)
RGB (0–1)0.1137, 0.2, 0.4392
RGB percentages11.4%, 20%, 43.9%
HSLhsl(224.1, 58.9%, 27.6%)
HSV / HSBhsv(224.1, 74.1%, 43.9%)
CMYK74.1%, 54.5%, 0%, 56.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,913,712
CSS custom property--colour: #1D3370;

Brightness & contrast

Relative luminance0.03799WCAG 2.x, 0 is black and 1 is white
Perceived brightness56.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.93:1
Contrast with white11.93:1WCAG normal text: AAA
Contrast with black1.76:1WCAG normal text: Fail
Greyscale equivalent#333333
Inverted#E2CC8F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0C3B72no red cones; affects about 1% of men; ΔE 7.5 from the original
Deuteranopia#00336Fno green cones; the most common form, about 1% of men; ΔE 3.7 from the original
Tritanopia#00424Cno blue cones; rare, and affects men and women equally; ΔE 39.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.93:1WCAG large text: AAA
Contrast with black, large text1.76:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 14.7Midnight blue · ΔE 22.1Rebecca purple · ΔE 31.6Steel blue · ΔE 35.2Slate blue · ΔE 37Royal blue · ΔE 38.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 14.71, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#705A1D
Analogous#1D5C70, #311D70
Triadic#701D33, #33701D
Split complementary#70301D, #5D701D
Tetradic#701D5C, #705A1D, #1D7030

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7C96DD
Lighter +30%#5375D3
Lighter +20%#3258C1
Lighter +10%#274599
Darker −10%#132147
Darker −20%#080E1F
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0B2B82
Less saturated −25%#2F3B5E

Channel breakdown

R29
G51
B112
Red29 (11.4%)
Green51 (20%)
Blue112 (43.9%)
Hue224.1°
Saturation (HSL)58.87%
Lightness27.65%
Dominant channelBlue
Hex per channelR 1D · G 33 · B 70

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Every value on this page was computed from “1d3370” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.