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Colour

#1F3A65

  • #1F3A65
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F3A65 is a blue with RGB values 31, 58, 101 and HSL 217°, 53%, 26%. It is a dark colour, so white text on it reaches 11.3:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F3A65#1F3A65
HEX#1F3A65
RGBrgb(31, 58, 101)
RGB (0–1)0.1216, 0.2275, 0.3961
RGB percentages12.2%, 22.7%, 39.6%
HSLhsl(216.9, 53%, 25.9%)
HSV / HSBhsv(216.9, 69.3%, 39.6%)
CMYK69.3%, 42.6%, 0%, 60.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,046,565
CSS custom property--colour: #1F3A65;

Brightness & contrast

Relative luminance0.04257WCAG 2.x, 0 is black and 1 is white
Perceived brightness58.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 11.34:1
Contrast with white11.34:1WCAG normal text: AAA
Contrast with black1.85:1WCAG normal text: Fail
Greyscale equivalent#373737
Inverted#E0C59A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#273E67no red cones; affects about 1% of men; ΔE 2.5 from the original
Deuteranopia#1C3764no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#00444Ano blue cones; rare, and affects men and women equally; ΔE 29.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text11.34:1WCAG large text: AAA
Contrast with black, large text1.85:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 25.6Steel blue · ΔE 29.7Dark slate grey · ΔE 30.7Slate grey · ΔE 34.3Midnight blue · ΔE 34.9Dim grey · ΔE 35.1
Nearest named CSS colourDark slateblue (#483D8B)ΔE 25.64, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#654A1F
Analogous#1F5D65, #271F65
Triadic#651F3A, #3A651F
Split complementary#65271F, #5D651F
Tetradic#651F5D, #654A1F, #1F6527

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7A9DD6
Lighter +30%#5381CA
Lighter +20%#3767B3
Lighter +10%#2B508C
Darker −10%#13243E
Darker −20%#070D17
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0E3675
Less saturated −25%#2F3E54

Channel breakdown

R31
G58
B101
Red31 (12.2%)
Green58 (22.7%)
Blue101 (39.6%)
Hue216.86°
Saturation (HSL)53.03%
Lightness25.88%
Dominant channelBlue
Hex per channelR 1F · G 3A · B 65

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Every value on this page was computed from “1f3a65” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.