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Recognised as Colour

#2B4273

  • #2B4273
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2B4273 is a blue with RGB values 43, 66, 115 and HSL 221°, 46%, 31%. It is a dark colour, so white text on it reaches 9.9:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2B4273#2B4273
HEX#2B4273
RGBrgb(43, 66, 115)
RGB (0–1)0.1686, 0.2588, 0.451
RGB percentages16.9%, 25.9%, 45.1%
HSLhsl(220.8, 45.6%, 31%)
HSV / HSBhsv(220.8, 62.6%, 45.1%)
CMYK62.6%, 42.6%, 0%, 54.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,835,059
CSS custom property--colour: #2B4273;

Brightness & contrast

Relative luminance0.05648WCAG 2.x, 0 is black and 1 is white
Perceived brightness68 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.86:1
Contrast with white9.86:1WCAG normal text: AAA
Contrast with black2.13:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#D4BD8C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2D4775no red cones; affects about 1% of men; ΔE 3.2 from the original
Deuteranopia#234072no green cones; the most common form, about 1% of men; ΔE 1.7 from the original
Tritanopia#004D55no blue cones; rare, and affects men and women equally; ΔE 32.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.86:1WCAG large text: AAA
Contrast with black, large text2.13:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.6Steel blue · ΔE 26.7Midnight blue · ΔE 32.9Slate grey · ΔE 33.2Dark slate grey · ΔE 33.5Light slate grey · ΔE 35.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.62, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#735C2B
Analogous#2B6673, #382B73
Triadic#732B42, #42732B
Split complementary#73382B, #66732B
Tetradic#732B66, #735C2B, #2B7338

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#93A9D7
Lighter +30%#6E8BC9
Lighter +20%#496DBB
Lighter +10%#395798
Darker −10%#1D2D4E
Darker −20%#0F1729
Darker −30%#010204
Darker −40%#000000
More saturated +25%#173B87
Less saturated −25%#3F495F

Channel breakdown

R43
G66
B115
Red43 (16.9%)
Green66 (25.9%)
Blue115 (45.1%)
Hue220.83°
Saturation (HSL)45.57%
Lightness30.98%
Dominant channelBlue
Hex per channelR 2B · G 42 · B 73

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Every value on this page was computed from “2b4273” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.