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Recognised as Colour

#1D3755

  • #1D3755
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1D3755 is a blue with RGB values 29, 55, 85 and HSL 212°, 49%, 22%. It is a dark colour, so white text on it reaches 12.1:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1D3755#1D3755
HEX#1D3755
RGBrgb(29, 55, 85)
RGB (0–1)0.1137, 0.2157, 0.3333
RGB percentages11.4%, 21.6%, 33.3%
HSLhsl(212.1, 49.1%, 22.4%)
HSV / HSBhsv(212.1, 65.9%, 33.3%)
CMYK65.9%, 35.3%, 0%, 66.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,914,709
CSS custom property--colour: #1D3755;

Brightness & contrast

Relative luminance0.03649WCAG 2.x, 0 is black and 1 is white
Perceived brightness53.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.14:1
Contrast with white12.14:1WCAG normal text: AAA
Contrast with black1.73:1WCAG normal text: Fail
Greyscale equivalent#343434
Inverted#E2C8AA

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2A3956no red cones; affects about 1% of men; ΔE 3.3 from the original
Deuteranopia#233354no green cones; the most common form, about 1% of men; ΔE 4.1 from the original
Tritanopia#003E42no blue cones; rare, and affects men and women equally; ΔE 21.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.14:1WCAG large text: AAA
Contrast with black, large text1.73:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 23.1Dim grey · ΔE 30.5Black · ΔE 30.9Slate grey · ΔE 32.3Steel blue · ΔE 32.3Dark slateblue · ΔE 33.9
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 23.12, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#553B1D
Analogous#1D5355, #1F1D55
Triadic#551D37, #37551D
Split complementary#551F1D, #53551D
Tetradic#551D53, #553B1D, #1D551F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#709CCE
Lighter +30%#4A81C1
Lighter +20%#3768A1
Lighter +10%#2A507B
Darker −10%#101E2F
Darker −20%#030609
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0F3663
Less saturated −25%#2B3847

Channel breakdown

R29
G55
B85
Red29 (11.4%)
Green55 (21.6%)
Blue85 (33.3%)
Hue212.14°
Saturation (HSL)49.12%
Lightness22.35%
Dominant channelBlue
Hex per channelR 1D · G 37 · B 55

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Every value on this page was computed from “1d3755” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.