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Recognised as Colour

#233A50

  • #233A50
  • Blue
  • Dark
  • Nearest: Dark slate grey

#233A50 is a blue with RGB values 35, 58, 80 and HSL 209°, 39%, 23%. It is a dark colour, so white text on it reaches 11.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#233A50#233A50
HEX#233A50
RGBrgb(35, 58, 80)
RGB (0–1)0.1373, 0.2275, 0.3137
RGB percentages13.7%, 22.7%, 31.4%
HSLhsl(209.3, 39.1%, 22.5%)
HSV / HSBhsv(209.3, 56.3%, 31.4%)
CMYK56.3%, 27.5%, 0%, 68.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,308,688
CSS custom property--colour: #233A50;

Brightness & contrast

Relative luminance0.03963WCAG 2.x, 0 is black and 1 is white
Perceived brightness55.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.72:1
Contrast with white11.72:1WCAG normal text: AAA
Contrast with black1.79:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#DCC5AF

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#313B51no red cones; affects about 1% of men; ΔE 4.4 from the original
Deuteranopia#2B3650no green cones; the most common form, about 1% of men; ΔE 5.2 from the original
Tritanopia#0C3F42no blue cones; rare, and affects men and women equally; ΔE 16.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.72:1WCAG large text: AAA
Contrast with black, large text1.79:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.7Dim grey · ΔE 26.4Black · ΔE 28.6Slate grey · ΔE 29.8Light slate grey · ΔE 32.8Steel blue · ΔE 33.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.71, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#503923
Analogous#235050, #232350
Triadic#50233A, #3A5023
Split complementary#502323, #505023
Tetradic#502350, #503923, #235023

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7AA0C5
Lighter +30%#5787B5
Lighter +20%#426D97
Lighter +10%#335473
Darker −10%#13202D
Darker −20%#040709
Darker −30%#000000
Darker −40%#000000
More saturated +25%#153A5E
Less saturated −25%#313A42

Channel breakdown

R35
G58
B80
Red35 (13.7%)
Green58 (22.7%)
Blue80 (31.4%)
Hue209.33°
Saturation (HSL)39.13%
Lightness22.55%
Dominant channelBlue
Hex per channelR 23 · G 3A · B 50

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Every value on this page was computed from “233a50” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.