Colour

#2158DB

#2158DB
Blue
Dark
Nearest: Royal blue

#2158DB is a blue with RGB values 33, 88, 219 and HSL 222°, 74%, 49%. It is a dark colour, so white text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Royal blue.

Colour values

#2158DB#2158DB

HEX#2158DB

RGBrgb(33, 88, 219)

RGB (0–1)0.1294, 0.3451, 0.8588

RGB percentages12.9%, 34.5%, 85.9%

HSLhsl(222.3, 73.8%, 49.4%)

HSV / HSBhsv(222.3, 84.9%, 85.9%)

CMYK84.9%, 59.8%, 0%, 14.1%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer2,185,435

CSS custom property--colour: #2158DB;

Brightness & contrast

Relative luminance0.12417WCAG 2.x, 0 is black and 1 is white

Perceived brightness101.7 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 6.03:1

Contrast with white6.03:1WCAG normal text: AA

Contrast with black3.48:1WCAG normal text: Fail

Greyscale equivalent#565656

Inverted#DEA724

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#006CDFno red cones; affects about 1% of men; ΔE 15.1 from the original

Deuteranopia#005BD9no green cones; the most common form, about 1% of men; ΔE 4.3 from the original

Tritanopia#007A91no blue cones; rare, and affects men and women equally; ΔE 72.8 from the original

Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning

Contrast with white, large text6.03:1WCAG large text: AAA

Contrast with black, large text3.48:1WCAG large text: AA

Named colours

Royal blue · ΔE 10.3 Slate blue · ΔE 14.9 Medium slateblue · ΔE 15.2 Medium purple · ΔE 25.7 Rebecca purple · ΔE 28.3 Dodgerblue · ΔE 29.1

Nearest named CSS colourRoyal blue (#4169E1)ΔE 10.27, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

base +30°+90°+120°+180°+210°+240°+270°+330°

Complementary#DBA421

Analogous#21B5DB, #4721DB

Triadic#DB2158, #58DB21

Split complementary#DB4721, #B5DB21

Tetradic#DB21B5, #DBA421, #21DB47

Tints, shades & saturation

+40%+30%+20%+10%base -10%-20%-30%-40%

Lighter +40%#D0DCF8

Lighter +30%#A4BBF1

Lighter +20%#7799EB

Lighter +10%#4B78E4

Darker −10%#1A46AF

Darker −20%#143482

Darker −30%#0D2356

Darker −40%#06112A

More saturated +25%#014BFB

Less saturated −25%#4165BB

Channel breakdown

R33

G88

B219

Red33 (12.9%)

Green88 (34.5%)

Blue219 (85.9%)

Hue222.26°

Saturation (HSL)73.81%

Lightness49.41%

Dominant channelBlue

Hex per channelR 21 · G 58 · B DB

Keep nerding

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#2158DB

Colour values

Brightness & contrast

Colour vision & accessibility

Named colours

Colour harmonies

Tints, shades & saturation

Channel breakdown

Keep nerding

Harmonies

Lighter and darker

Similar named colours

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