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Colour

#313B66

  • #313B66
  • Blue
  • Dark
  • Nearest: Dark slateblue

#313B66 is a blue with RGB values 49, 59, 102 and HSL 229°, 35%, 30%. It is a dark colour, so white text on it reaches 10.8:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#313B66#313B66
HEX#313B66
RGBrgb(49, 59, 102)
RGB (0–1)0.1922, 0.2314, 0.4
RGB percentages19.2%, 23.1%, 40%
HSLhsl(228.7, 35.1%, 29.6%)
HSV / HSBhsv(228.7, 52%, 40%)
CMYK52%, 42.2%, 0%, 60%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer3,226,470
CSS custom property--colour: #313B66;

Brightness & contrast

Relative luminance0.0474WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.78:1
Contrast with white10.78:1WCAG normal text: AAA
Contrast with black1.95:1WCAG normal text: Fail
Greyscale equivalent#3C3C3C
Inverted#CEC499

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#2A4068no red cones; affects about 1% of men; ΔE 4.7 from the original
Deuteranopia#253B65no green cones; the most common form, about 1% of men; ΔE 3.5 from the original
Tritanopia#1C444Bno blue cones; rare, and affects men and women equally; ΔE 27.6 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.78:1WCAG large text: AAA
Contrast with black, large text1.95:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 23.4Steel blue · ΔE 30.1Dark slate grey · ΔE 31.5Slate grey · ΔE 33.3Dim grey · ΔE 33.7Midnight blue · ΔE 33.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 23.37, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#665C31
Analogous#315666, #423166
Triadic#66313B, #3B6631
Split complementary#664231, #566631
Tetradic#663155, #665C31, #316642

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#96A1CD
Lighter +30%#7481BC
Lighter +20%#5263AB
Lighter +10%#424F88
Darker −10%#202744
Darker −20%#101321
Darker −30%#000000
Darker −40%#000000
More saturated +25%#1E2F79
Less saturated −25%#444753

Channel breakdown

R49
G59
B102
Red49 (19.2%)
Green59 (23.1%)
Blue102 (40%)
Hue228.68°
Saturation (HSL)35.1%
Lightness29.61%
Dominant channelBlue
Hex per channelR 31 · G 3B · B 66

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Every value on this page was computed from “313b66” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.