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Recognised as Colour

#3F528E

  • #3F528E
  • Blue
  • Dark
  • Nearest: Dark slateblue

#3F528E is a blue with RGB values 63, 82, 142 and HSL 226°, 39%, 40%. It is a dark colour, so white text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#3F528E#3F528E
HEX#3F528E
RGBrgb(63, 82, 142)
RGB (0–1)0.2471, 0.3216, 0.5569
RGB percentages24.7%, 32.2%, 55.7%
HSLhsl(225.6, 38.5%, 40.2%)
HSV / HSBhsv(225.6, 55.6%, 55.7%)
CMYK55.6%, 42.3%, 0%, 44.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer4,149,902
CSS custom property--colour: #3F528E;

Brightness & contrast

Relative luminance0.09044WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.48:1
Contrast with white7.48:1WCAG normal text: AAA
Contrast with black2.81:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#C0AD71

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#395990no red cones; affects about 1% of men; ΔE 5.7 from the original
Deuteranopia#30528Dno green cones; the most common form, about 1% of men; ΔE 3.7 from the original
Tritanopia#155F69no blue cones; rare, and affects men and women equally; ΔE 37.5 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.48:1WCAG large text: AAA
Contrast with black, large text2.81:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 17Steel blue · ΔE 22.7Cornflower blue · ΔE 29.3Midnight blue · ΔE 32Slate grey · ΔE 32.9Rebecca purple · ΔE 33.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 17.04, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#8E7B3F
Analogous#3F7A8E, #533F8E
Triadic#8E3F52, #528E3F
Split complementary#8E533F, #7A8E3F
Tetradic#8E3F7A, #8E7B3F, #3F8E53

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B9C2E0
Lighter +30%#96A4D0
Lighter +20%#7285C1
Lighter +10%#4F67B1
Darker −10%#2F3E6B
Darker −20%#202947
Darker −30%#101524
Darker −40%#000001
More saturated +25%#2545A8
Less saturated −25%#595F74

Channel breakdown

R63
G82
B142
Red63 (24.7%)
Green82 (32.2%)
Blue142 (55.7%)
Hue225.57°
Saturation (HSL)38.54%
Lightness40.2%
Dominant channelBlue
Hex per channelR 3F · G 52 · B 8E

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Every value on this page was computed from “3f528e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.