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Recognised as Colour

#1D233E

  • #1D233E
  • Blue
  • Dark
  • Nearest: Black

#1D233E is a blue with RGB values 29, 35, 62 and HSL 229°, 36%, 18%. It is a dark colour, so white text on it reaches 15.4:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#1D233E#1D233E
HEX#1D233E
RGBrgb(29, 35, 62)
RGB (0–1)0.1137, 0.1373, 0.2431
RGB percentages11.4%, 13.7%, 24.3%
HSLhsl(229.1, 36.3%, 17.8%)
HSV / HSBhsv(229.1, 53.2%, 24.3%)
CMYK53.2%, 43.5%, 0%, 75.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,909,566
CSS custom property--colour: #1D233E;

Brightness & contrast

Relative luminance0.01811WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.42:1
Contrast with white15.42:1WCAG normal text: AAA
Contrast with black1.36:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#E2DCC1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#19263Fno red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#16233Dno green cones; the most common form, about 1% of men; ΔE 2.5 from the original
Tritanopia#11292Dno blue cones; rare, and affects men and women equally; ΔE 19 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.42:1WCAG large text: AAA
Contrast with black, large text1.36:1WCAG large text: Fail

Named colours

Black · ΔE 24Dark slate grey · ΔE 28.5Dark slateblue · ΔE 35.1Dim grey · ΔE 35.6Slate grey · ΔE 40Midnight blue · ΔE 40.5
Nearest named CSS colourBlack (#000000)ΔE 24.01, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#3E381D
Analogous#1D343E, #271D3E
Triadic#3E1D23, #233E1D
Split complementary#3E271D, #343E1D
Tetradic#3E1D34, #3E381D, #1D3E27

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#6D7BBA
Lighter +30%#4E5EA6
Lighter +20%#3E4A83
Lighter +10%#2D3761
Darker −10%#0D0F1B
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#121C49
Less saturated −25%#282A33

Channel breakdown

R29
G35
B62
Red29 (11.4%)
Green35 (13.7%)
Blue62 (24.3%)
Hue229.09°
Saturation (HSL)36.26%
Lightness17.84%
Dominant channelBlue
Hex per channelR 1D · G 23 · B 3E

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Every value on this page was computed from “1d233e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.