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Colour

#1F445D

  • #1F445D
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1F445D is a blue with RGB values 31, 68, 93 and HSL 204°, 50%, 24%. It is a dark colour, so white text on it reaches 10.3:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1F445D#1F445D
HEX#1F445D
RGBrgb(31, 68, 93)
RGB (0–1)0.1216, 0.2667, 0.3647
RGB percentages12.2%, 26.7%, 36.5%
HSLhsl(204.2, 50%, 24.3%)
HSV / HSBhsv(204.2, 66.7%, 36.5%)
CMYK66.7%, 26.9%, 0%, 63.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,049,117
CSS custom property--colour: #1F445D;

Brightness & contrast

Relative luminance0.05216WCAG 2.x, 0 is black and 1 is white
Perceived brightness63.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.28:1
Contrast with white10.28:1WCAG normal text: AAA
Contrast with black2.04:1WCAG normal text: Fail
Greyscale equivalent#3E3E3E
Inverted#E0BBA2

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#39445Eno red cones; affects about 1% of men; ΔE 7.8 from the original
Deuteranopia#303E5Dno green cones; the most common form, about 1% of men; ΔE 8.5 from the original
Tritanopia#004A4Dno blue cones; rare, and affects men and women equally; ΔE 18 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.28:1WCAG large text: AAA
Contrast with black, large text2.04:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 17.1Dim grey · ΔE 25.8Slate grey · ΔE 26.9Steel blue · ΔE 28.5Light slate grey · ΔE 29.7Gray · ΔE 32.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 17.13, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#5D381F
Analogous#1F5D57, #1F255D
Triadic#5D1F44, #445D1F
Split complementary#5D1F25, #5D571F
Tetradic#571F5D, #5D381F, #255D1F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#76ADD2
Lighter +30%#5096C5
Lighter +20%#397CA9
Lighter +10%#2C6083
Darker −10%#122837
Darker −20%#060C10
Darker −30%#000000
Darker −40%#000000
More saturated +25%#10476D
Less saturated −25%#2F414E

Channel breakdown

R31
G68
B93
Red31 (12.2%)
Green68 (26.7%)
Blue93 (36.5%)
Hue204.19°
Saturation (HSL)50%
Lightness24.31%
Dominant channelBlue
Hex per channelR 1F · G 44 · B 5D

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Every value on this page was computed from “1f445d” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.