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Recognised as Colour

#121F53

  • #121F53
  • Blue
  • Dark
  • Nearest: Dark slateblue

#121F53 is a blue with RGB values 18, 31, 83 and HSL 228°, 64%, 20%. It is a dark colour, so white text on it reaches 15.6:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#121F53#121F53
HEX#121F53
RGBrgb(18, 31, 83)
RGB (0–1)0.0706, 0.1216, 0.3255
RGB percentages7.1%, 12.2%, 32.5%
HSLhsl(228, 64.4%, 19.8%)
HSV / HSBhsv(228, 78.3%, 32.5%)
CMYK78.3%, 62.7%, 0%, 67.5%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,187,667
CSS custom property--colour: #121F53;

Brightness & contrast

Relative luminance0.01733WCAG 2.x, 0 is black and 1 is white
Perceived brightness38 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.59:1
Contrast with white15.59:1WCAG normal text: AAA
Contrast with black1.35:1WCAG normal text: Fail
Greyscale equivalent#202020
Inverted#EDE0AC

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002755no red cones; affects about 1% of men; ΔE 7.9 from the original
Deuteranopia#002152no green cones; the most common form, about 1% of men; ΔE 4.2 from the original
Tritanopia#002C35no blue cones; rare, and affects men and women equally; ΔE 34.8 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.59:1WCAG large text: AAA
Contrast with black, large text1.35:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 21.8Midnight blue · ΔE 23.2Rebecca purple · ΔE 36.2Black · ΔE 39.3Indigo · ΔE 42Steel blue · ΔE 43
Nearest named CSS colourDark slateblue (#483D8B)ΔE 21.8, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#534612
Analogous#124053, #251253
Triadic#53121F, #1F5312
Split complementary#532612, #405312
Tetradic#531240, #534612, #125325

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#5771DA
Lighter +30%#2D4ED1
Lighter +20%#243EA7
Lighter +10%#1B2F7D
Darker −10%#090F29
Darker −20%#000000
Darker −30%#000000
Darker −40%#000000
More saturated +25%#051760
Less saturated −25%#1F2746

Channel breakdown

R18
G31
B83
Red18 (7.1%)
Green31 (12.2%)
Blue83 (32.5%)
Hue228°
Saturation (HSL)64.36%
Lightness19.8%
Dominant channelBlue
Hex per channelR 12 · G 1F · B 53

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Every value on this page was computed from “121f53” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.