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Colour

#284F63

  • #284F63
  • Blue
  • Dark
  • Nearest: Dark slate grey

#284F63 is a blue with RGB values 40, 79, 99 and HSL 200°, 42%, 27%. It is a dark colour, so white text on it reaches 8.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#284F63#284F63
HEX#284F63
RGBrgb(40, 79, 99)
RGB (0–1)0.1569, 0.3098, 0.3882
RGB percentages15.7%, 31%, 38.8%
HSLhsl(200.3, 42.4%, 27.3%)
HSV / HSBhsv(200.3, 59.6%, 38.8%)
CMYK59.6%, 20.2%, 0%, 61.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,641,763
CSS custom property--colour: #284F63;

Brightness & contrast

Relative luminance0.06944WCAG 2.x, 0 is black and 1 is white
Perceived brightness72.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 8.79:1
Contrast with white8.79:1WCAG normal text: AAA
Contrast with black2.39:1WCAG normal text: Fail
Greyscale equivalent#484848
Inverted#D7B09C

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#454E64no red cones; affects about 1% of men; ΔE 9.7 from the original
Deuteranopia#3D4863no green cones; the most common form, about 1% of men; ΔE 10.5 from the original
Tritanopia#005456no blue cones; rare, and affects men and women equally; ΔE 15.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text8.79:1WCAG large text: AAA
Contrast with black, large text2.39:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 12.9Dim grey · ΔE 21.6Slate grey · ΔE 22.4Light slate grey · ΔE 25.2Steel blue · ΔE 26.6Gray · ΔE 28
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 12.92, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#633C28
Analogous#28635A, #283263
Triadic#63284F, #4F6328
Split complementary#632832, #635A28
Tetradic#5A2863, #633C28, #326328

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#88B7CF
Lighter +30%#64A1C0
Lighter +20%#4589AC
Lighter +10%#376C87
Darker −10%#19323F
Darker −20%#0B151A
Darker −30%#000000
Darker −40%#000000
More saturated +25%#175574
Less saturated −25%#394952

Channel breakdown

R40
G79
B99
Red40 (15.7%)
Green79 (31%)
Blue99 (38.8%)
Hue200.34°
Saturation (HSL)42.45%
Lightness27.25%
Dominant channelBlue
Hex per channelR 28 · G 4F · B 63

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Every value on this page was computed from “284f63” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.