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Recognised as Colour

#2837DF

  • #2837DF
  • Blue
  • Dark
  • Nearest: Medium blue

#2837DF is a blue with RGB values 40, 55, 223 and HSL 235°, 74%, 52%. It is a dark colour, so white text on it reaches 7.8:1 contrast (AAA for normal text). The nearest named colour is Medium blue.

Colour values

#2837DF#2837DF
HEX#2837DF
RGBrgb(40, 55, 223)
RGB (0–1)0.1569, 0.2157, 0.8745
RGB percentages15.7%, 21.6%, 87.5%
HSLhsl(235.1, 74.1%, 51.6%)
HSV / HSBhsv(235.1, 82.1%, 87.5%)
CMYK82.1%, 75.3%, 0%, 12.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,635,743
CSS custom property--colour: #2837DF;

Brightness & contrast

Relative luminance0.08511WCAG 2.x, 0 is black and 1 is white
Perceived brightness89 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.77:1
Contrast with white7.77:1WCAG normal text: AAA
Contrast with black2.7:1WCAG normal text: Fail
Greyscale equivalent#404040
Inverted#D7C820

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005BE4no red cones; affects about 1% of men; ΔE 25.1 from the original
Deuteranopia#0049DCno green cones; the most common form, about 1% of men; ΔE 14.8 from the original
Tritanopia#006A89no blue cones; rare, and affects men and women equally; ΔE 91.2 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.77:1WCAG large text: AAA
Contrast with black, large text2.7:1WCAG large text: Fail

Named colours

Medium blue · ΔE 18.1Blue violet · ΔE 20.6Dark blue · ΔE 26.3Dark violet · ΔE 27.5Dark orchid · ΔE 28.8Medium slateblue · ΔE 29
Nearest named CSS colourMedium blue (#0000CD)ΔE 18.06, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DFD028
Analogous#2893DF, #7428DF
Triadic#DF2837, #37DF28
Split complementary#DF7428, #93DF28
Tetradic#DF2893, #DFD028, #28DF75

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#DADCF9
Lighter +30%#ADB3F3
Lighter +20%#818AEC
Lighter +10%#5460E6
Darker −10%#1B28B9
Darker −20%#151F8C
Darker −30%#0E1560
Darker −40%#080B33
More saturated +25%#091DFE
Less saturated −25%#4751C0

Channel breakdown

R40
G55
B223
Red40 (15.7%)
Green55 (21.6%)
Blue223 (87.5%)
Hue235.08°
Saturation (HSL)74.09%
Lightness51.57%
Dominant channelBlue
Hex per channelR 28 · G 37 · B DF

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Every value on this page was computed from “2837df” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.