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Recognised as Colour

#1F4075

  • #1F4075
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F4075 is a blue with RGB values 31, 64, 117 and HSL 217°, 58%, 29%. 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 slateblue.

Colour values

#1F4075#1F4075
HEX#1F4075
RGBrgb(31, 64, 117)
RGB (0–1)0.1216, 0.251, 0.4588
RGB percentages12.2%, 25.1%, 45.9%
HSLhsl(217, 58.1%, 29%)
HSV / HSBhsv(217, 73.5%, 45.9%)
CMYK73.5%, 45.3%, 0%, 54.1%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,048,117
CSS custom property--colour: #1F4075;

Brightness & contrast

Relative luminance0.05242WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.25:1
Contrast with white10.25:1WCAG normal text: AAA
Contrast with black2.05:1WCAG normal text: Fail
Greyscale equivalent#3D3D3D
Inverted#E0BF8A

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#264577no red cones; affects about 1% of men; ΔE 3.1 from the original
Deuteranopia#173D74no green cones; the most common form, about 1% of men; ΔE 2 from the original
Tritanopia#004C54no blue cones; rare, and affects men and women equally; ΔE 34 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.25:1WCAG large text: AAA
Contrast with black, large text2.05:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 20.5Steel blue · ΔE 27.7Midnight blue · ΔE 31Slate grey · ΔE 35.9Dark slate grey · ΔE 36.1Cornflower blue · ΔE 37.8
Nearest named CSS colourDark slateblue (#483D8B)ΔE 20.5, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#75541F
Analogous#1F6B75, #291F75
Triadic#751F40, #40751F
Split complementary#75291F, #6B751F
Tetradic#751F6B, #75541F, #1F7529

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#82A5DE
Lighter +30%#5A88D3
Lighter +20%#346CC6
Lighter +10%#2A569D
Darker −10%#142A4D
Darker −20%#0A1424
Darker −30%#000000
Darker −40%#000000
More saturated +25%#0C3C88
Less saturated −25%#314462

Channel breakdown

R31
G64
B117
Red31 (12.2%)
Green64 (25.1%)
Blue117 (45.9%)
Hue216.98°
Saturation (HSL)58.11%
Lightness29.02%
Dominant channelBlue
Hex per channelR 1F · G 40 · B 75

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Every value on this page was computed from “1f4075” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.