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Recognised as Colour

#1F344E

  • #1F344E
  • Blue
  • Dark
  • Nearest: Dark slate grey

#1F344E is a blue with RGB values 31, 52, 78 and HSL 213°, 43%, 21%. It is a dark colour, so white text on it reaches 12.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1F344E#1F344E
HEX#1F344E
RGBrgb(31, 52, 78)
RGB (0–1)0.1216, 0.2039, 0.3059
RGB percentages12.2%, 20.4%, 30.6%
HSLhsl(213.2, 43.1%, 21.4%)
HSV / HSBhsv(213.2, 60.3%, 30.6%)
CMYK60.3%, 33.3%, 0%, 69.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,045,006
CSS custom property--colour: #1F344E;

Brightness & contrast

Relative luminance0.03297WCAG 2.x, 0 is black and 1 is white
Perceived brightness50.7 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 12.65:1
Contrast with white12.65:1WCAG normal text: AAA
Contrast with black1.66:1WCAG normal text: Fail
Greyscale equivalent#313131
Inverted#E0CBB1

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#29354Fno red cones; affects about 1% of men; ΔE 2.9 from the original
Deuteranopia#23314Dno green cones; the most common form, about 1% of men; ΔE 3 from the original
Tritanopia#033A3Dno blue cones; rare, and affects men and women equally; ΔE 19.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text12.65:1WCAG large text: AAA
Contrast with black, large text1.66:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 21.7Black · ΔE 28.1Dim grey · ΔE 29.7Slate grey · ΔE 32.7Steel blue · ΔE 34.5Light slate grey · ΔE 35.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 21.69, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#4E391F
Analogous#1F4C4E, #221F4E
Triadic#4E1F34, #344E1F
Split complementary#4E211F, #4C4E1F
Tetradic#4E1F4C, #4E391F, #1F4E21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7298C7
Lighter +30%#4E7DB8
Lighter +20%#3C6597
Lighter +10%#2E4C72
Darker −10%#101C2A
Darker −20%#020305
Darker −30%#000000
Darker −40%#000000
More saturated +25%#11335C
Less saturated −25%#2D3540

Channel breakdown

R31
G52
B78
Red31 (12.2%)
Green52 (20.4%)
Blue78 (30.6%)
Hue213.19°
Saturation (HSL)43.12%
Lightness21.37%
Dominant channelBlue
Hex per channelR 1F · G 34 · B 4E

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Every value on this page was computed from “1f344e” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.