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Recognised as Colour

#1F4957

  • #1F4957
  • Cyan
  • Dark
  • Nearest: Dark slate grey

#1F4957 is a cyan with RGB values 31, 73, 87 and HSL 195°, 47%, 23%. It is a dark colour, so white text on it reaches 9.8:1 contrast (AAA for normal text). The nearest named colour is Dark slate grey.

Colour values

#1F4957#1F4957
HEX#1F4957
RGBrgb(31, 73, 87)
RGB (0–1)0.1216, 0.2863, 0.3412
RGB percentages12.2%, 28.6%, 34.1%
HSLhsl(195, 47.5%, 23.1%)
HSV / HSBhsv(195, 64.4%, 34.1%)
CMYK64.4%, 16.1%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,050,391
CSS custom property--colour: #1F4957;

Brightness & contrast

Relative luminance0.05745WCAG 2.x, 0 is black and 1 is white
Perceived brightness65.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 9.77:1
Contrast with white9.77:1WCAG normal text: AAA
Contrast with black2.15:1WCAG normal text: Fail
Greyscale equivalent#414141
Inverted#E0B6A8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#414758no red cones; affects about 1% of men; ΔE 11.9 from the original
Deuteranopia#394157no green cones; the most common form, about 1% of men; ΔE 12.7 from the original
Tritanopia#004D4Dno blue cones; rare, and affects men and women equally; ΔE 12.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text9.77:1WCAG large text: AAA
Contrast with black, large text2.15:1WCAG large text: Fail

Named colours

Dark slate grey · ΔE 9.5Dim grey · ΔE 22.4Slate grey · ΔE 25.4Teal · ΔE 27.6Light slate grey · ΔE 28.2Gray · ΔE 29.6
Nearest named CSS colourDark slate grey (#2F4F4F)ΔE 9.51, clearly different but related
Hue familycyan
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#572D1F
Analogous#1F5749, #1F2D57
Triadic#571F49, #49571F
Split complementary#571F2D, #57491F
Tetradic#491F57, #572D1F, #2D571F

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#74B7CE
Lighter +30%#4FA4C0
Lighter +20%#3A88A2
Lighter +10%#2C697D
Darker −10%#122931
Darker −20%#040A0C
Darker −30%#000000
Darker −40%#000000
More saturated +25%#105066
Less saturated −25%#2E4248

Channel breakdown

R31
G73
B87
Red31 (12.2%)
Green73 (28.6%)
Blue87 (34.1%)
Hue195°
Saturation (HSL)47.46%
Lightness23.14%
Dominant channelBlue
Hex per channelR 1F · G 49 · B 57

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Every value on this page was computed from “1f4957” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.