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Recognised as Colour

#3A51DA

  • #3A51DA
  • Blue
  • Dark
  • Nearest: Medium slateblue

#3A51DA is a blue with RGB values 58, 81, 218 and HSL 231°, 68%, 54%. It is a dark colour, so white text on it reaches 6.2:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#3A51DA#3A51DA
HEX#3A51DA
RGBrgb(58, 81, 218)
RGB (0–1)0.2275, 0.3176, 0.8549
RGB percentages22.7%, 31.8%, 85.5%
HSLhsl(231.4, 68.4%, 54.1%)
HSV / HSBhsv(231.4, 73.4%, 85.5%)
CMYK73.4%, 62.8%, 0%, 14.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,822,042
CSS custom property--colour: #3A51DA;

Brightness & contrast

Relative luminance0.11846WCAG 2.x, 0 is black and 1 is white
Perceived brightness101.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.23:1
Contrast with white6.23:1WCAG normal text: AA
Contrast with black3.37:1WCAG normal text: Fail
Greyscale equivalent#565656
Inverted#C5AE25

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0068DEno red cones; affects about 1% of men; ΔE 18.5 from the original
Deuteranopia#0059D7no green cones; the most common form, about 1% of men; ΔE 10.1 from the original
Tritanopia#00758Eno blue cones; rare, and affects men and women equally; ΔE 76.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.23:1WCAG large text: AAA
Contrast with black, large text3.37:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 13.6Royal blue · ΔE 15.4Slate blue · ΔE 15.5Medium purple · ΔE 26.4Rebecca purple · ΔE 27Dark blue · ΔE 29.2
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 13.59, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DAC33A
Analogous#3AA1DA, #733ADA
Triadic#DA3A51, #51DA3A
Split complementary#DA733A, #A1DA3A
Tetradic#DA3AA1, #DAC33A, #3ADA73

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E6E9FA
Lighter +30%#BBC3F2
Lighter +20%#909DEA
Lighter +10%#6577E2
Darker −10%#243ABD
Darker −20%#1C2D92
Darker −30%#132068
Darker −40%#0B123D
More saturated +25%#1D3CF7
Less saturated −25%#5766BD

Channel breakdown

R58
G81
B218
Red58 (22.7%)
Green81 (31.8%)
Blue218 (85.5%)
Hue231.38°
Saturation (HSL)68.38%
Lightness54.12%
Dominant channelBlue
Hex per channelR 3A · G 51 · B DA

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Every value on this page was computed from “3a51da” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.