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Recognised as Colour

#002551

  • #002551
  • Blue
  • Dark
  • Nearest: Dark slateblue

#002551 is a blue with RGB values 0, 37, 81 and HSL 213°, 100%, 16%. It is a dark colour, so white text on it reaches 15.2:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#002551#002551
HEX#002551
RGBrgb(0, 37, 81)
RGB (0–1)0, 0.1451, 0.3176
RGB percentages0%, 14.5%, 31.8%
HSLhsl(212.6, 100%, 15.9%)
HSV / HSBhsv(212.6, 100%, 31.8%)
CMYK100%, 54.3%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer9,553
CSS custom property--colour: #002551;

Brightness & contrast

Relative luminance0.01917WCAG 2.x, 0 is black and 1 is white
Perceived brightness39.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.18:1
Contrast with white15.18:1WCAG normal text: AAA
Contrast with black1.38:1WCAG normal text: Fail
Greyscale equivalent#202020
Inverted#FFDAAE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#092A53no red cones; affects about 1% of men; ΔE 3.5 from the original
Deuteranopia#002250no green cones; the most common form, about 1% of men; ΔE 2.4 from the original
Tritanopia#003037no blue cones; rare, and affects men and women equally; ΔE 29.3 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.18:1WCAG large text: AAA
Contrast with black, large text1.38:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 27Midnight blue · ΔE 30.9Black · ΔE 34.7Dark slate grey · ΔE 36.6Steel blue · ΔE 39.2Dim grey · ΔE 42.9
Nearest named CSS colourDark slateblue (#483D8B)ΔE 27.02, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#512C00
Analogous#004D51, #040051
Triadic#510025, #255100
Split complementary#510400, #4D5100
Tetradic#51004D, #512C00, #005104

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#1E85FF
Lighter +30%#006BEA
Lighter +20%#0054B7
Lighter +10%#003C84
Darker −10%#000E1E
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#002551
Less saturated −25%#0A2647

Channel breakdown

R0
G37
B81
Red0 (0%)
Green37 (14.5%)
Blue81 (31.8%)
Hue212.59°
Saturation (HSL)100%
Lightness15.88%
Dominant channelBlue
Hex per channelR 00 · G 25 · B 51

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Every value on this page was computed from “hex 002551” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.