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Colour

#1F487B

  • #1F487B
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1F487B is a blue with RGB values 31, 72, 123 and HSL 213°, 60%, 30%. It is a dark colour, so white text on it reaches 9.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1F487B#1F487B
HEX#1F487B
RGBrgb(31, 72, 123)
RGB (0–1)0.1216, 0.2824, 0.4824
RGB percentages12.2%, 28.2%, 48.2%
HSLhsl(213.3, 59.7%, 30.2%)
HSV / HSBhsv(213.3, 74.8%, 48.2%)
CMYK74.8%, 41.5%, 0%, 51.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,050,171
CSS custom property--colour: #1F487B;

Brightness & contrast

Relative luminance0.06356WCAG 2.x, 0 is black and 1 is white
Perceived brightness71.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.25:1
Contrast with white9.25:1WCAG normal text: AAA
Contrast with black2.27:1WCAG normal text: Fail
Greyscale equivalent#434343
Inverted#E0B784

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#304C7Dno red cones; affects about 1% of men; ΔE 3.3 from the original
Deuteranopia#22437Ano green cones; the most common form, about 1% of men; ΔE 4.2 from the original
Tritanopia#00545Bno blue cones; rare, and affects men and women equally; ΔE 32.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.25:1WCAG large text: AAA
Contrast with black, large text2.27:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 23.4Steel blue · ΔE 23.8Slate grey · ΔE 32.6Dark slate grey · ΔE 33.6Light slate grey · ΔE 34.5Midnight blue · ΔE 34.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 23.36, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7B521F
Analogous#1F767B, #241F7B
Triadic#7B1F48, #487B1F
Split complementary#7B241F, #767B1F
Tetradic#7B1F76, #7B521F, #1F7B24

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#86AEE0
Lighter +30%#5D93D6
Lighter +20%#3478CC
Lighter +10%#2960A4
Darker −10%#153052
Darker −20%#0A182A
Darker −30%#000001
Darker −40%#000000
More saturated +25%#0C468E
Less saturated −25%#324A68

Channel breakdown

R31
G72
B123
Red31 (12.2%)
Green72 (28.2%)
Blue123 (48.2%)
Hue213.26°
Saturation (HSL)59.74%
Lightness30.2%
Dominant channelBlue
Hex per channelR 1F · G 48 · B 7B

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Every value on this page was computed from “1f487b” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.