Nerdulator> put something in

Recognised as Colour

#18387F

  • #18387F
  • Blue
  • Dark
  • Nearest: Dark slateblue

#18387F is a blue with RGB values 24, 56, 127 and HSL 221°, 68%, 30%. It is a dark colour, so white text on it reaches 11:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#18387F#18387F
HEX#18387F
RGBrgb(24, 56, 127)
RGB (0–1)0.0941, 0.2196, 0.498
RGB percentages9.4%, 22%, 49.8%
HSLhsl(221.4, 68.2%, 29.6%)
HSV / HSBhsv(221.4, 81.1%, 49.8%)
CMYK81.1%, 55.9%, 0%, 50.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,587,327
CSS custom property--colour: #18387F;

Brightness & contrast

Relative luminance0.04555WCAG 2.x, 0 is black and 1 is white
Perceived brightness62.1 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 10.99:1
Contrast with white10.99:1WCAG normal text: AAA
Contrast with black1.91:1WCAG normal text: Fail
Greyscale equivalent#363636
Inverted#E7C780

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#004181no red cones; affects about 1% of men; ΔE 8.1 from the original
Deuteranopia#00387Eno green cones; the most common form, about 1% of men; ΔE 2.5 from the original
Tritanopia#004955no blue cones; rare, and affects men and women equally; ΔE 43.9 from the original
Distinguishable without hueYesnever rely on hue alone to carry meaning
Contrast with white, large text10.99:1WCAG large text: AAA
Contrast with black, large text1.91:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 11.3Midnight blue · ΔE 19.2Rebecca purple · ΔE 27.9Slate blue · ΔE 31.5Royal blue · ΔE 32.8Steel blue · ΔE 35.7
Nearest named CSS colourDark slateblue (#483D8B)ΔE 11.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7F5F18
Analogous#186C7F, #2B187F
Triadic#7F1838, #387F18
Split complementary#7F2C18, #6B7F18
Tetradic#7F186C, #7F5F18, #187F2C

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#7D9DE6
Lighter +30%#527DDE
Lighter +20%#285ED5
Lighter +10%#204BAA
Darker −10%#102554
Darker −20%#081229
Darker −30%#000000
Darker −40%#000000
More saturated +25%#053192
Less saturated −25%#2B3F6C

Channel breakdown

R24
G56
B127
Red24 (9.4%)
Green56 (22%)
Blue127 (49.8%)
Hue221.36°
Saturation (HSL)68.21%
Lightness29.61%
Dominant channelBlue
Hex per channelR 18 · G 38 · B 7F

Keep nerding

Every link below is a page Nerdulator can generate from what it already knows about this value.

Nerdulate something else

Nothing in mind? Surprise me · today’s page

Every value on this page was computed from “18387f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.