Colour

#155AFB

#155AFB
Blue
Dark
Nearest: Medium slateblue

#155AFB is a blue with RGB values 21, 90, 251 and HSL 222°, 97%, 53%. It is a dark colour, so white text on it reaches 5.4:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#155AFB#155AFB

HEX#155AFB

RGBrgb(21, 90, 251)

RGB (0–1)0.0824, 0.3529, 0.9843

RGB percentages8.2%, 35.3%, 98.4%

HSLhsl(222, 96.6%, 53.3%)

HSV / HSBhsv(222, 91.6%, 98.4%)

CMYK91.6%, 64.1%, 0%, 1.6%≈naive device-independent conversion; real print needs an ICC profile

24-bit integer1,399,547

CSS custom property--colour: #155AFB;

Brightness & contrast

Relative luminance0.14437WCAG 2.x, 0 is black and 1 is white

Perceived brightness109.9 of 255ITU-R BT.601 weighting

Light or darkDark

Best text colour on this backgroundWhitecontrast 5.4:1

Contrast with white5.4:1WCAG normal text: AA

Contrast with black3.89:1WCAG normal text: Fail

Greyscale equivalent#575757

Inverted#EAA504

Colour vision & accessibility

Normal vision Protanopia Deuteranopia Tritanopia

Protanopia#0075FFno red cones; affects about 1% of men; ΔE 19.7 from the original

Deuteranopia#0060F8no green cones; the most common form, about 1% of men; ΔE 6.4 from the original

Tritanopia#0086A3no blue cones; rare, and affects men and women equally; ΔE 86.8 from the original

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

Contrast with white, large text5.4:1WCAG large text: AAA

Contrast with black, large text3.89:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 20.7 Royal blue · ΔE 25.1 Slate blue · ΔE 27.6 Blue violet · ΔE 29.9 Medium blue · ΔE 33 Dark orchid · ΔE 34

Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 20.73, a distinctly different colour

Hue familyblue

CSS keyword usableNo exact keyword

Colour harmonies

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

Complementary#FBB615

Analogous#15CDFB, #4315FB

Triadic#FB155A, #5AFB15

Split complementary#FB4315, #CDFB15

Tetradic#FB15CD, #FBB615, #15FB43

Tints, shades & saturation

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

Lighter +40%#DEE7FE

Lighter +30%#ABC4FE

Lighter +20%#79A1FD

Lighter +10%#477DFC

Darker −10%#0444D9

Darker −20%#0334A7

Darker −30%#022475

Darker −40%#011543

More saturated +25%#1158FF

Less saturated −25%#3366DD

Channel breakdown

R21

G90

B251

Red21 (8.2%)

Green90 (35.3%)

Blue251 (98.4%)

Hue222°

Saturation (HSL)96.64%

Lightness53.33%

Dominant channelBlue

Hex per channelR 15 · G 5A · B FB

Keep nerding

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

#155AFB

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

Nerdulate something else