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Recognised as Colour

#102F51

  • #102F51
  • Blue
  • Dark
  • Nearest: Dark slate grey

#102F51 is a blue with RGB values 16, 47, 81 and HSL 211°, 67%, 19%. It is a dark colour, so white text on it reaches 13.6:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#102F51#102F51
HEX#102F51
RGBrgb(16, 47, 81)
RGB (0–1)0.0627, 0.1843, 0.3176
RGB percentages6.3%, 18.4%, 31.8%
HSLhsl(211.4, 67%, 19%)
HSV / HSBhsv(211.4, 80.2%, 31.8%)
CMYK80.2%, 42%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,060,689
CSS custom property--colour: #102F51;

Brightness & contrast

Relative luminance0.02737WCAG 2.x, 0 is black and 1 is white
Perceived brightness46.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.57:1
Contrast with white13.57:1WCAG normal text: AAA
Contrast with black1.55:1WCAG normal text: Fail
Greyscale equivalent#2B2B2B
Inverted#EFD0AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#1F3152no red cones; affects about 1% of men; ΔE 3 from the original
Deuteranopia#152B50no green cones; the most common form, about 1% of men; ΔE 3.8 from the original
Tritanopia#00373Cno blue cones; rare, and affects men and women equally; ΔE 23.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text13.57:1WCAG large text: AAA
Contrast with black, large text1.55:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 27.5Black · ΔE 30.7Dark slateblue · ΔE 32.2Steel blue · ΔE 35Dim grey · ΔE 35.1Slate grey · ΔE 36.7
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 27.53, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#513210
Analogous#105051, #121051
Triadic#51102F, #2F5110
Split complementary#511110, #505110
Tetradic#511050, #513210, #105111

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5093DD
Lighter +30%#2979D1
Lighter +20%#2160A6
Lighter +10%#18487C
Darker −10%#081626
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#042E5D
Less saturated −25%#1C3045

Channel breakdown

R16
G47
B81
Red16 (6.3%)
Green47 (18.4%)
Blue81 (31.8%)
Hue211.38°
Saturation (HSL)67.01%
Lightness19.02%
Dominant channelBlue
Hex per channelR 10 · G 2F · B 51

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Every value on this page was computed from “102f51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.