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Recognised as Colour

#1F4A51

  • #1F4A51
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1F4A51 is a cyan with RGB values 31, 74, 81 and HSL 188°, 45%, 22%. It is a dark colour, so white text on it reaches 9.7:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1F4A51#1F4A51
HEX#1F4A51
RGBrgb(31, 74, 81)
RGB (0–1)0.1216, 0.2902, 0.3176
RGB percentages12.2%, 29%, 31.8%
HSLhsl(188.4, 44.6%, 22%)
HSV / HSBhsv(188.4, 61.7%, 31.8%)
CMYK61.7%, 8.6%, 0%, 68.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,050,641
CSS custom property--colour: #1F4A51;

Brightness & contrast

Relative luminance0.05783WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.2 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.74:1
Contrast with white9.74:1WCAG normal text: AAA
Contrast with black2.16:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#E0B5AE

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#444751no red cones; affects about 1% of men; ΔE 13.9 from the original
Deuteranopia#3C4251no green cones; the most common form, about 1% of men; ΔE 14 from the original
Tritanopia#004D4Cno blue cones; rare, and affects men and women equally; ΔE 8.7 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.74:1WCAG large text: AAA
Contrast with black, large text2.16:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 5.6Dim grey · ΔE 21.8Teal · ΔE 25.4Slate grey · ΔE 26.2Gray · ΔE 29Light slate grey · ΔE 29
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 5.56, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#51261F
Analogous#1F513F, #1F3151
Triadic#511F4A, #4A511F
Split complementary#511F31, #513F1F
Tetradic#3F1F51, #51261F, #31511F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#73BDC9
Lighter +30%#4EACBB
Lighter +20%#3B8D9B
Lighter +10%#2D6C76
Darker −10%#11282C
Darker −20%#030707
Darker −30%#000000
Darker −40%#000000
More saturated +25%#11545F
Less saturated −25%#2D4043

Channel breakdown

R31
G74
B81
Red31 (12.2%)
Green74 (29%)
Blue81 (31.8%)
Hue188.4°
Saturation (HSL)44.64%
Lightness21.96%
Dominant channelBlue
Hex per channelR 1F · G 4A · B 51

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Every value on this page was computed from “1f4a51” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.