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Colour

#1661FF

  • #1661FF
  • Blue
  • Dark
  • Nearest: Medium slateblue

#1661FF is a blue with RGB values 22, 97, 255 and HSL 221°, 100%, 54%. It is a dark colour, so white text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Medium slateblue.

Colour values

#1661FF#1661FF
HEX#1661FF
RGBrgb(22, 97, 255)
RGB (0–1)0.0863, 0.3804, 1
RGB percentages8.6%, 38%, 100%
HSLhsl(220.7, 100%, 54.3%)
HSV / HSBhsv(220.7, 91.4%, 100%)
CMYK91.4%, 62%, 0%, 0%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,466,879
CSS custom property--colour: #1661FF;

Brightness & contrast

Relative luminance0.1594WCAG 2.x, 0 is black and 1 is white
Perceived brightness114.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 5.01:1
Contrast with white5.01:1WCAG normal text: AA
Contrast with black4.19:1WCAG normal text: Fail
Greyscale equivalent#5C5C5C
Inverted#E99E00

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#007AFFno red cones; affects about 1% of men; ΔE 20.2 from the original
Deuteranopia#0065FCno green cones; the most common form, about 1% of men; ΔE 4.9 from the original
Tritanopia#008BA7no blue cones; rare, and affects men and women equally; ΔE 85.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text5.01:1WCAG large text: AAA
Contrast with black, large text4.19:1WCAG large text: AA

Named colours

Medium slateblue · ΔE 19.1Royal blue · ΔE 22.3Slate blue · ΔE 26.1Blue violet · ΔE 32.5Medium purple · ΔE 34.6Dark orchid · ΔE 35.4
Nearest named CSS colourMedium slateblue (#7B68EE)ΔE 19.13, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#FFB416
Analogous#16D5FF, #3F16FF
Triadic#FF1661, #61FF16
Split complementary#FF4016, #D5FF16
Tetradic#FF16D5, #FFB416, #16FF40

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#E2EBFF
Lighter +30%#AFC9FF
Lighter +20%#7CA6FF
Lighter +10%#4984FF
Darker −10%#0049E2
Darker −20%#0038AF
Darker −30%#00287C
Darker −40%#001749
More saturated +25%#1661FF
Less saturated −25%#336BE2

Channel breakdown

R22
G97
B255
Red22 (8.6%)
Green97 (38%)
Blue255 (100%)
Hue220.69°
Saturation (HSL)100%
Lightness54.31%
Dominant channelBlue
Hex per channelR 16 · G 61 · B FF

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Every value on this page was computed from “1661ff” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.