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Recognised as Colour

#2841B4

  • #2841B4
  • Blue
  • Dark
  • Nearest: Slate blue

#2841B4 is a blue with RGB values 40, 65, 180 and HSL 229°, 64%, 43%. It is a dark colour, so white text on it reaches 8.4:1 contrast (AAA for normal text). The nearest named colour is Slate blue.

Colour values

#2841B4#2841B4
HEX#2841B4
RGBrgb(40, 65, 180)
RGB (0–1)0.1569, 0.2549, 0.7059
RGB percentages15.7%, 25.5%, 70.6%
HSLhsl(229.3, 63.6%, 43.1%)
HSV / HSBhsv(229.3, 77.8%, 70.6%)
CMYK77.8%, 63.9%, 0%, 29.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,638,260
CSS custom property--colour: #2841B4;

Brightness & contrast

Relative luminance0.07527WCAG 2.x, 0 is black and 1 is white
Perceived brightness81.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.38:1
Contrast with white8.38:1WCAG normal text: AAA
Contrast with black2.51:1WCAG normal text: Fail
Greyscale equivalent#444444
Inverted#D7BE4B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0054B8no red cones; affects about 1% of men; ΔE 15.1 from the original
Deuteranopia#0047B2no green cones; the most common form, about 1% of men; ΔE 7.4 from the original
Tritanopia#005F74no blue cones; rare, and affects men and women equally; ΔE 66 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text8.38:1WCAG large text: AAA
Contrast with black, large text2.51:1WCAG large text: Fail

Named colours

Slate blue · ΔE 14Royal blue · ΔE 16.2Rebecca purple · ΔE 19.3Medium slateblue · ΔE 21.1Midnight blue · ΔE 22.1Dark slateblue · ΔE 22.5
Nearest named CSS colourSlate blue (#6A5ACD)ΔE 14.05, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B49B28
Analogous#2887B4, #5528B4
Triadic#B42841, #41B428
Split complementary#B45528, #87B428
Tetradic#B42887, #B49B28, #28B455

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B9C2EF
Lighter +30%#8F9EE6
Lighter +20%#657BDD
Lighter +10%#3B57D4
Darker −10%#1F328A
Darker −20%#152361
Darker −30%#0C1437
Darker −40%#03050D
More saturated +25%#0D2FD0
Less saturated −25%#445399

Channel breakdown

R40
G65
B180
Red40 (15.7%)
Green65 (25.5%)
Blue180 (70.6%)
Hue229.29°
Saturation (HSL)63.64%
Lightness43.14%
Dominant channelBlue
Hex per channelR 28 · G 41 · B B4

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Every value on this page was computed from “2841b4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.