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Recognised as Colour

#0F171F

  • #0F171F
  • Blue
  • Dark
  • Nearest: Black

#0F171F is a blue with RGB values 15, 23, 31 and HSL 210°, 35%, 9%. It is a dark colour, so white text on it reaches 18.1:1 contrast (AAA for normal text). The nearest named colour is Black.

Colour values

#0F171F#0F171F
HEX#0F171F
RGBrgb(15, 23, 31)
RGB (0–1)0.0588, 0.0902, 0.1216
RGB percentages5.9%, 9%, 12.2%
HSLhsl(210, 34.8%, 9%)
HSV / HSBhsv(210, 51.6%, 12.2%)
CMYK51.6%, 25.8%, 0%, 87.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer988,959
CSS custom property--colour: #0F171F;

Brightness & contrast

Relative luminance0.00813WCAG 2.x, 0 is black and 1 is white
Perceived brightness22.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 18.06:1
Contrast with white18.06:1WCAG normal text: AAA
Contrast with black1.16:1WCAG normal text: Fail
Greyscale equivalent#161616
Inverted#F0E8E0

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#14171Fno red cones; affects about 1% of men; ΔE 2.1 from the original
Deuteranopia#12151Fno green cones; the most common form, about 1% of men; ΔE 2.6 from the original
Tritanopia#0A191Ano blue cones; rare, and affects men and women equally; ΔE 6.1 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text18.06:1WCAG large text: AAA
Contrast with black, large text1.16:1WCAG large text: Fail

Named colours

Black · ΔE 10Dark slate grey · ΔE 26.4Dim grey · ΔE 37.7Slate grey · ΔE 45.7Gray · ΔE 46.7Light slate grey · ΔE 48.8
Nearest named CSS colourBlack (#000000)ΔE 10.02, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#1F170F
Analogous#0F1F1F, #0F0F1F
Triadic#1F0F17, #171F0F
Split complementary#1F0F0F, #1F1F0F
Tetradic#1F0F1F, #1F170F, #0F1F0F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#527DA8
Lighter +30%#416386
Lighter +20%#304A64
Lighter +10%#203141
Darker −10%#000000
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#091725
Less saturated −25%#151719

Channel breakdown

R15
G23
B31
Red15 (5.9%)
Green23 (9%)
Blue31 (12.2%)
Hue210°
Saturation (HSL)34.78%
Lightness9.02%
Dominant channelBlue
Hex per channelR 0F · G 17 · B 1F

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Every value on this page was computed from “0f171f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.