Nerdulator> put something in

Recognised as Colour

#18A3EF

  • #18A3EF
  • Blue
  • Dark
  • Nearest: Deep skyblue

#18A3EF is a blue with RGB values 24, 163, 239 and HSL 201°, 87%, 52%. It is a dark colour, so black text on it reaches 7.5:1 contrast (AAA for normal text). The nearest named colour is Deep skyblue.

Colour values

#18A3EF#18A3EF
HEX#18A3EF
RGBrgb(24, 163, 239)
RGB (0–1)0.0941, 0.6392, 0.9373
RGB percentages9.4%, 63.9%, 93.7%
HSLhsl(201.2, 87%, 51.6%)
HSV / HSBhsv(201.2, 90%, 93.7%)
CMYK90%, 31.8%, 0%, 6.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,614,831
CSS custom property--colour: #18A3EF;

Brightness & contrast

Relative luminance0.32621WCAG 2.x, 0 is black and 1 is white
Perceived brightness149.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 7.52:1
Contrast with white2.79:1WCAG normal text: Fail
Contrast with black7.52:1WCAG normal text: AAA
Greyscale equivalent#8B8B8B
Inverted#E75C10

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7EA5F2no red cones; affects about 1% of men; ΔE 15.9 from the original
Deuteranopia#6293EEno green cones; the most common form, about 1% of men; ΔE 18.3 from the original
Tritanopia#00B6BEno blue cones; rare, and affects men and women equally; ΔE 42.7 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text2.79:1WCAG large text: Fail
Contrast with black, large text7.52:1WCAG large text: AAA

Named colours

Deep skyblue · ΔE 14.3Cornflower blue · ΔE 16.9Steel blue · ΔE 19.4Dodgerblue · ΔE 23.9Light skyblue · ΔE 25Sky blue · ΔE 31.3
Nearest named CSS colourDeep skyblue (#00BFFF)ΔE 14.34, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#EF6418
Analogous#18EFCF, #1838EF
Triadic#EF18A3, #A3EF18
Split complementary#EF1838, #EFD018
Tetradic#CF18EF, #EF6418, #37EF18

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D7EFFC
Lighter +30%#A7DCF9
Lighter +20%#77C9F6
Lighter +10%#48B6F2
Darker −10%#0E85C6
Darker −20%#0A6597
Darker −30%#074567
Darker −40%#042537
More saturated +25%#08A8FF
Less saturated −25%#379AD0

Channel breakdown

R24
G163
B239
Red24 (9.4%)
Green163 (63.9%)
Blue239 (93.7%)
Hue201.21°
Saturation (HSL)87.04%
Lightness51.57%
Dominant channelBlue
Hex per channelR 18 · G A3 · B EF

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 “18a3ef” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.