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Recognised as Colour

#3F3DA1

  • #3F3DA1
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3F3DA1 is a blue with RGB values 63, 61, 161 and HSL 241°, 45%, 44%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#3F3DA1#3F3DA1
HEX#3F3DA1
RGBrgb(63, 61, 161)
RGB (0–1)0.2471, 0.2392, 0.6314
RGB percentages24.7%, 23.9%, 63.1%
HSLhsl(241.2, 45%, 43.5%)
HSV / HSBhsv(241.2, 62.1%, 63.1%)
CMYK60.9%, 62.1%, 0%, 36.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,144,545
CSS custom property--colour: #3F3DA1;

Brightness & contrast

Relative luminance0.06967WCAG 2.x, 0 is black and 1 is white
Perceived brightness79.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.77:1
Contrast with white8.77:1WCAG normal text: AAA
Contrast with black2.39:1WCAG normal text: Fail
Greyscale equivalent#454545
Inverted#C0C25E

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004FA4no red cones; affects about 1% of men; ΔE 17.8 from the original
Deuteranopia#00479Fno green cones; the most common form, about 1% of men; ΔE 14 from the original
Tritanopia#005669no blue cones; rare, and affects men and women equally; ΔE 59.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.77:1WCAG large text: AAA
Contrast with black, large text2.39:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 13.2Rebecca purple · ΔE 13.4Slate blue · ΔE 14.8Midnight blue · ΔE 16.5Royal blue · ΔE 20.3Indigo · ΔE 23.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 13.2, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#9FA13D
Analogous#3D6DA1, #713DA1
Triadic#A13F3D, #3DA13F
Split complementary#A1713D, #6DA13D
Tetradic#A13D6D, #9FA13D, #3DA171

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#C3C2E8
Lighter +30%#9E9DDA
Lighter +20%#7A78CC
Lighter +10%#5553BE
Darker −10%#312F7C
Darker −20%#222157
Darker −30%#141332
Darker −40%#05050D
More saturated +25%#2421BD
Less saturated −25%#5A5985

Channel breakdown

R63
G61
B161
Red63 (24.7%)
Green61 (23.9%)
Blue161 (63.1%)
Hue241.2°
Saturation (HSL)45.05%
Lightness43.53%
Dominant channelBlue
Hex per channelR 3F · G 3D · B A1

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Every value on this page was computed from “3f3da1” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.