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Colour

#121B57

  • #121B57
  • Blue
  • Dark
  • Nearest: Midnight blue

#121B57 is a blue with RGB values 18, 27, 87 and HSL 232°, 66%, 21%. It is a dark colour, so white text on it reaches 15.9:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#121B57#121B57
HEX#121B57
RGBrgb(18, 27, 87)
RGB (0–1)0.0706, 0.1059, 0.3412
RGB percentages7.1%, 10.6%, 34.1%
HSLhsl(232.2, 65.7%, 20.6%)
HSV / HSBhsv(232.2, 79.3%, 34.1%)
CMYK79.3%, 69%, 0%, 65.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,186,647
CSS custom property--colour: #121B57;

Brightness & contrast

Relative luminance0.01601WCAG 2.x, 0 is black and 1 is white
Perceived brightness37.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 15.91:1
Contrast with white15.91:1WCAG normal text: AAA
Contrast with black1.32:1WCAG normal text: Fail
Greyscale equivalent#1D1D1D
Inverted#EDE4A8

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#002559no red cones; affects about 1% of men; ΔE 9.4 from the original
Deuteranopia#001F56no green cones; the most common form, about 1% of men; ΔE 5.5 from the original
Tritanopia#002B36no blue cones; rare, and affects men and women equally; ΔE 39.4 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text15.91:1WCAG large text: AAA
Contrast with black, large text1.32:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 17.2Dark slateblue · ΔE 19.2Rebecca purple · ΔE 31.8Indigo · ΔE 36.3Navy · ΔE 38.9Slate blue · ΔE 41.3
Nearest named CSS colourMidnight blue (#191970)ΔE 17.2, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#574E12
Analogous#123E57, #2B1257
Triadic#57121B, #1B5712
Split complementary#572B12, #3E5712
Tetradic#57123E, #574E12, #12572B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#586ADD
Lighter +30%#2E44D4
Lighter +20%#2335AC
Lighter +10%#1B2881
Darker −10%#090E2D
Darker −20%#010102
Darker −30%#000000
Darker −40%#000000
More saturated +25%#051164
Less saturated −25%#1F254A

Channel breakdown

R18
G27
B87
Red18 (7.1%)
Green27 (10.6%)
Blue87 (34.1%)
Hue232.17°
Saturation (HSL)65.71%
Lightness20.59%
Dominant channelBlue
Hex per channelR 12 · G 1B · B 57

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Every value on this page was computed from “121b57” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.