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Recognised as Colour

#31637F

  • #31637F
  • Blue
  • Dark
  • Nearest: Slate grey

#31637F is a blue with RGB values 49, 99, 127 and HSL 202°, 44%, 35%. It is a dark colour, so white text on it reaches 6.5:1 contrast (AA for normal text). The nearest named colour is Slate grey.

Colour values

#31637F#31637F
HEX#31637F
RGBrgb(49, 99, 127)
RGB (0–1)0.1922, 0.3882, 0.498
RGB percentages19.2%, 38.8%, 49.8%
HSLhsl(201.5, 44.3%, 34.5%)
HSV / HSBhsv(201.5, 61.4%, 49.8%)
CMYK61.4%, 22%, 0%, 50.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,236,735
CSS custom property--colour: #31637F;

Brightness & contrast

Relative luminance0.11109WCAG 2.x, 0 is black and 1 is white
Perceived brightness91.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.52:1
Contrast with white6.52:1WCAG normal text: AA
Contrast with black3.22:1WCAG normal text: Fail
Greyscale equivalent#5A5A5A
Inverted#CE9C80

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#566280no red cones; affects about 1% of men; ΔE 11.3 from the original
Deuteranopia#4B5A7Fno green cones; the most common form, about 1% of men; ΔE 12.4 from the original
Tritanopia#006A6Cno blue cones; rare, and affects men and women equally; ΔE 20.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text6.52:1WCAG large text: AAA
Contrast with black, large text3.22:1WCAG large text: AA

Named colours

Slate grey · ΔE 17.5Steel blue · ΔE 17.5Dark slate grey · ΔE 19.4Light slate grey · ΔE 19.6Dim grey · ΔE 22.6Teal · ΔE 25.7
Nearest named CSS colourSlate grey (#708090)ΔE 17.5, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7F4D31
Analogous#317F74, #313C7F
Triadic#7F3163, #637F31
Split complementary#7F313C, #7F7431
Tetradic#74317F, #7F4D31, #3C7F31

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#A1C6DB
Lighter +30%#7CB0CD
Lighter +20%#5899BE
Lighter +10%#3F80A4
Darker −10%#23465A
Darker −20%#152A35
Darker −30%#060D11
Darker −40%#000000
More saturated +25%#1B6995
Less saturated −25%#475D69

Channel breakdown

R49
G99
B127
Red49 (19.2%)
Green99 (38.8%)
Blue127 (49.8%)
Hue201.54°
Saturation (HSL)44.32%
Lightness34.51%
Dominant channelBlue
Hex per channelR 31 · G 63 · B 7F

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Every value on this page was computed from “31637f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.