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Recognised as Colour

#1E57B8

  • #1E57B8
  • Blue
  • Dark
  • Nearest: Royal blue

#1E57B8 is a blue with RGB values 30, 87, 184 and HSL 218°, 72%, 42%. It is a dark colour, so white text on it reaches 6.8:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#1E57B8#1E57B8
HEX#1E57B8
RGBrgb(30, 87, 184)
RGB (0–1)0.1176, 0.3412, 0.7216
RGB percentages11.8%, 34.1%, 72.2%
HSLhsl(217.8, 72%, 42%)
HSV / HSBhsv(217.8, 83.7%, 72.2%)
CMYK83.7%, 52.7%, 0%, 27.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,988,536
CSS custom property--colour: #1E57B8;

Brightness & contrast

Relative luminance0.10553WCAG 2.x, 0 is black and 1 is white
Perceived brightness92.6 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 6.75:1
Contrast with white6.75:1WCAG normal text: AA
Contrast with black3.11:1WCAG normal text: Fail
Greyscale equivalent#525252
Inverted#E1A847

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#0D63BBno red cones; affects about 1% of men; ΔE 9.2 from the original
Deuteranopia#0055B6no green cones; the most common form, about 1% of men; ΔE 1.8 from the original
Tritanopia#006F7Fno blue cones; rare, and affects men and women equally; ΔE 56 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text6.75:1WCAG large text: AAA
Contrast with black, large text3.11:1WCAG large text: AA

Named colours

Royal blue · ΔE 14.8Dark slateblue · ΔE 17.9Slate blue · ΔE 18.7Dodgerblue · ΔE 23.4Medium purple · ΔE 25.1Cornflower blue · ΔE 25.9
Nearest named CSS colourRoyal blue (#4169E1)ΔE 14.81, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#B87F1E
Analogous#1EA4B8, #321EB8
Triadic#B81E57, #57B81E
Split complementary#B8321E, #A4B81E
Tetradic#B81EA4, #B87F1E, #1EB832

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B0C8F2
Lighter +30%#84AAEB
Lighter +20%#588CE4
Lighter +10%#2C6EDD
Darker −10%#17428C
Darker −20%#102E60
Darker −30%#091934
Darker −40%#010409
More saturated +25%#0350D3
Less saturated −25%#395E9D

Channel breakdown

R30
G87
B184
Red30 (11.8%)
Green87 (34.1%)
Blue184 (72.2%)
Hue217.79°
Saturation (HSL)71.96%
Lightness41.96%
Dominant channelBlue
Hex per channelR 1E · G 57 · B B8

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Every value on this page was computed from “1e57b8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.