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Recognised as Colour

#258DDE

  • #258DDE
  • Blue
  • Dark
  • Nearest: Cornflower blue

#258DDE is a blue with RGB values 37, 141, 222 and HSL 206°, 74%, 51%. It is a dark colour, so black text on it reaches 5.9:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#258DDE#258DDE
HEX#258DDE
RGBrgb(37, 141, 222)
RGB (0–1)0.1451, 0.5529, 0.8706
RGB percentages14.5%, 55.3%, 87.1%
HSLhsl(206.3, 73.7%, 50.8%)
HSV / HSBhsv(206.3, 83.3%, 87.1%)
CMYK83.3%, 36.5%, 0%, 12.9%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,461,150
CSS custom property--colour: #258DDE;

Brightness & contrast

Relative luminance0.24717WCAG 2.x, 0 is black and 1 is white
Perceived brightness133 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.94:1
Contrast with white3.53:1WCAG normal text: Fail
Contrast with black5.94:1WCAG normal text: AA
Greyscale equivalent#7D7D7D
Inverted#DA7221

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#6691E1no red cones; affects about 1% of men; ΔE 10 from the original
Deuteranopia#4B81DCno green cones; the most common form, about 1% of men; ΔE 11.7 from the original
Tritanopia#00A1ABno blue cones; rare, and affects men and women equally; ΔE 46.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.53:1WCAG large text: AA
Contrast with black, large text5.94:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 10.7Dodgerblue · ΔE 17.6Steel blue · ΔE 18Deep skyblue · ΔE 24.5Royal blue · ΔE 32.1Light skyblue · ΔE 32.7
Nearest named CSS colourCornflower blue (#6495ED)ΔE 10.74, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#DE7625
Analogous#25DED2, #2531DE
Triadic#DE258D, #8DDE25
Split complementary#DE2531, #DED325
Tetradic#D225DE, #DE7625, #31DE25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D6EAF9
Lighter +30%#AAD2F2
Lighter +20%#7EBBEB
Lighter +10%#51A4E5
Darker −10%#1B72B5
Darker −20%#155688
Darker −30%#0E3A5C
Darker −40%#071E30
More saturated +25%#0691FD
Less saturated −25%#4489BF

Channel breakdown

R37
G141
B222
Red37 (14.5%)
Green141 (55.3%)
Blue222 (87.1%)
Hue206.27°
Saturation (HSL)73.71%
Lightness50.78%
Dominant channelBlue
Hex per channelR 25 · G 8D · B DE

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Every value on this page was computed from “258dde” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.