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Recognised as Colour

#28487E

  • #28487E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#28487E is a blue with RGB values 40, 72, 126 and HSL 218°, 52%, 33%. It is a dark colour, so white text on it reaches 9.1:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#28487E#28487E
HEX#28487E
RGBrgb(40, 72, 126)
RGB (0–1)0.1569, 0.2824, 0.4941
RGB percentages15.7%, 28.2%, 49.4%
HSLhsl(217.7, 51.8%, 32.5%)
HSV / HSBhsv(217.7, 68.3%, 49.4%)
CMYK68.3%, 42.9%, 0%, 50.6%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,639,998
CSS custom property--colour: #28487E;

Brightness & contrast

Relative luminance0.06592WCAG 2.x, 0 is black and 1 is white
Perceived brightness73 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.06:1
Contrast with white9.06:1WCAG normal text: AAA
Contrast with black2.32:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#D7B781

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2F4D80no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#22457Dno green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#00545Dno blue cones; rare, and affects men and women equally; ΔE 34 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.06:1WCAG large text: AAA
Contrast with black, large text2.32:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 20.5Steel blue · ΔE 24.4Midnight blue · ΔE 32.7Slate grey · ΔE 33.5Cornflower blue · ΔE 34.7Light slate grey · ΔE 35.3
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.49, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7E5E28
Analogous#28737E, #33287E
Triadic#7E2848, #487E28
Split complementary#7E3328, #737E28
Tetradic#7E2873, #7E5E28, #287E33

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#95B0DD
Lighter +30%#6E93D1
Lighter +20%#4776C5
Lighter +10%#345EA5
Darker −10%#1C3257
Darker −20%#0F1C31
Darker −30%#03060A
Darker −40%#000000
More saturated +25%#134393
Less saturated −25%#3D4D69

Channel breakdown

R40
G72
B126
Red40 (15.7%)
Green72 (28.2%)
Blue126 (49.4%)
Hue217.67°
Saturation (HSL)51.81%
Lightness32.55%
Dominant channelBlue
Hex per channelR 28 · G 48 · B 7E

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Every value on this page was computed from “28487e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.