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Recognised as Colour

#2830A4

  • #2830A4
  • Blue
  • Dark
  • Nearest: Rebecca purple

#2830A4 is a blue with RGB values 40, 48, 164 and HSL 236°, 61%, 40%. It is a dark colour, so white text on it reaches 10.2:1 contrast (AAA for normal text). The nearest named colour is Rebecca purple.

Colour values

#2830A4#2830A4
HEX#2830A4
RGBrgb(40, 48, 164)
RGB (0–1)0.1569, 0.1882, 0.6431
RGB percentages15.7%, 18.8%, 64.3%
HSLhsl(236.1, 60.8%, 40%)
HSV / HSBhsv(236.1, 75.6%, 64.3%)
CMYK75.6%, 70.7%, 0%, 35.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,633,892
CSS custom property--colour: #2830A4;

Brightness & contrast

Relative luminance0.05245WCAG 2.x, 0 is black and 1 is white
Perceived brightness70 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.25:1
Contrast with white10.25:1WCAG normal text: AAA
Contrast with black2.05:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#D7CF5B

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0047A8no red cones; affects about 1% of men; ΔE 18.1 from the original
Deuteranopia#003BA2no green cones; the most common form, about 1% of men; ΔE 11.1 from the original
Tritanopia#005066no blue cones; rare, and affects men and women equally; ΔE 66.9 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text10.25:1WCAG large text: AAA
Contrast with black, large text2.05:1WCAG large text: Fail

Named colours

Rebecca purple · ΔE 17.6Navy · ΔE 17.6Indigo · ΔE 18.5Midnight blue · ΔE 18.7Slate blue · ΔE 18.7Dark blue · ΔE 18.9
Nearest named CSS colourRebecca purple (#663399)ΔE 17.6, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#A49C28
Analogous#286EA4, #5E28A4
Triadic#A42830, #30A428
Split complementary#A45E28, #6EA428
Tetradic#A4286E, #A49C28, #28A45E

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#ADB1EB
Lighter +30%#848AE1
Lighter +20%#5B63D7
Lighter +10%#323CCD
Darker −10%#1E247B
Darker −20%#141852
Darker −30%#0A0C29
Darker −40%#000000
More saturated +25%#0F1ABE
Less saturated −25%#42468B

Channel breakdown

R40
G48
B164
Red40 (15.7%)
Green48 (18.8%)
Blue164 (64.3%)
Hue236.13°
Saturation (HSL)60.78%
Lightness40%
Dominant channelBlue
Hex per channelR 28 · G 30 · B A4

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Every value on this page was computed from “2830a4” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.