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Recognised as Colour

#2D3980

  • #2D3980
  • Blue
  • Dark
  • Nearest: Dark slateblue

#2D3980 is a blue with RGB values 45, 57, 128 and HSL 231°, 48%, 34%. It is a dark colour, so white text on it reaches 10.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#2D3980#2D3980
HEX#2D3980
RGBrgb(45, 57, 128)
RGB (0–1)0.1765, 0.2235, 0.502
RGB percentages17.6%, 22.4%, 50.2%
HSLhsl(231.3, 48%, 33.9%)
HSV / HSBhsv(231.3, 64.8%, 50.2%)
CMYK64.8%, 55.5%, 0%, 49.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,963,840
CSS custom property--colour: #2D3980;

Brightness & contrast

Relative luminance0.05043WCAG 2.x, 0 is black and 1 is white
Perceived brightness66.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.46:1
Contrast with white10.46:1WCAG normal text: AAA
Contrast with black2.01:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#D2C67F

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#094382no red cones; affects about 1% of men; ΔE 10.9 from the original
Deuteranopia#003C7Fno green cones; the most common form, about 1% of men; ΔE 7.7 from the original
Tritanopia#004A56no blue cones; rare, and affects men and women equally; ΔE 44.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.46:1WCAG large text: AAA
Contrast with black, large text2.01:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 8Midnight blue · ΔE 18.5Rebecca purple · ΔE 25.1Slate blue · ΔE 29.7Royal blue · ΔE 32.3Medium purple · ΔE 34.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 7.99, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#80742D
Analogous#2D6280, #4B2D80
Triadic#802D39, #39802D
Split complementary#804B2D, #62802D
Tetradic#802D62, #80742D, #2D804B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9DA6DC
Lighter +30%#7784CF
Lighter +20%#5161C2
Lighter +10%#3A4AA6
Darker −10%#20285A
Darker −20%#121735
Darker −30%#05070F
Darker −40%#000000
More saturated +25%#172A96
Less saturated −25%#43486A

Channel breakdown

R45
G57
B128
Red45 (17.6%)
Green57 (22.4%)
Blue128 (50.2%)
Hue231.33°
Saturation (HSL)47.98%
Lightness33.92%
Dominant channelBlue
Hex per channelR 2D · G 39 · B 80

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Every value on this page was computed from “2d3980” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.