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Recognised as Colour

#315B78

  • #315B78
  • Blue
  • Dark
  • Nearest: Dark slate grey

#315B78 is a blue with RGB values 49, 91, 120 and HSL 205°, 42%, 33%. It is a dark colour, so white text on it reaches 7.2:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#315B78#315B78
HEX#315B78
RGBrgb(49, 91, 120)
RGB (0–1)0.1922, 0.3569, 0.4706
RGB percentages19.2%, 35.7%, 47.1%
HSLhsl(204.5, 42%, 33.1%)
HSV / HSBhsv(204.5, 59.2%, 47.1%)
CMYK59.2%, 24.2%, 0%, 52.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,234,680
CSS custom property--colour: #315B78;

Brightness & contrast

Relative luminance0.09491WCAG 2.x, 0 is black and 1 is white
Perceived brightness85 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.25:1
Contrast with white7.25:1WCAG normal text: AAA
Contrast with black2.9:1WCAG normal text: Fail
Greyscale equivalent#545454
Inverted#CEA487

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4E5B79no red cones; affects about 1% of men; ΔE 8.8 from the original
Deuteranopia#445477no green cones; the most common form, about 1% of men; ΔE 9.2 from the original
Tritanopia#006265no blue cones; rare, and affects men and women equally; ΔE 21.2 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text7.25:1WCAG large text: AAA
Contrast with black, large text2.9:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 19.1Slate grey · ΔE 19.2Steel blue · ΔE 19.3Light slate grey · ΔE 21.6Dim grey · ΔE 22.8Gray · ΔE 27.2
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 19.11, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#784E31
Analogous#317872, #313778
Triadic#78315B, #5B7831
Split complementary#783137, #787231
Tetradic#723178, #784E31, #377831

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#9EC0D7
Lighter +30%#7AA8C8
Lighter +20%#5591BA
Lighter +10%#40769C
Darker −10%#224054
Darker −20%#132430
Darker −30%#05090B
Darker −40%#000000
More saturated +25%#1C5F8D
Less saturated −25%#465763

Channel breakdown

R49
G91
B120
Red49 (19.2%)
Green91 (35.7%)
Blue120 (47.1%)
Hue204.51°
Saturation (HSL)42.01%
Lightness33.14%
Dominant channelBlue
Hex per channelR 31 · G 5B · B 78

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Every value on this page was computed from “315b78” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.