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Recognised as Colour

#1251AF

  • #1251AF
  • Blue
  • Dark
  • Nearest: Dark slateblue

#1251AF is a blue with RGB values 18, 81, 175 and HSL 216°, 81%, 38%. It is a dark colour, so white text on it reaches 7.4:1 contrast (AAA for normal text). The nearest named colour is Dark slateblue.

Colour values

#1251AF#1251AF
HEX#1251AF
RGBrgb(18, 81, 175)
RGB (0–1)0.0706, 0.3176, 0.6863
RGB percentages7.1%, 31.8%, 68.6%
HSLhsl(215.9, 81.3%, 37.8%)
HSV / HSBhsv(215.9, 89.7%, 68.6%)
CMYK89.7%, 53.7%, 0%, 31.4%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,200,559
CSS custom property--colour: #1251AF;

Brightness & contrast

Relative luminance0.09109WCAG 2.x, 0 is black and 1 is white
Perceived brightness86.3 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 7.44:1
Contrast with white7.44:1WCAG normal text: AAA
Contrast with black2.82:1WCAG normal text: Fail
Greyscale equivalent#4A4A4A
Inverted#EDAE50

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#005CB2no red cones; affects about 1% of men; ΔE 8.3 from the original
Deuteranopia#004FADno green cones; the most common form, about 1% of men; ΔE 1.1 from the original
Tritanopia#006878no blue cones; rare, and affects men and women equally; ΔE 54.3 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text7.44:1WCAG large text: AAA
Contrast with black, large text2.82:1WCAG large text: Fail

Named colours

Dark slateblue · ΔE 16.3Royal blue · ΔE 17.3Slate blue · ΔE 20.2Midnight blue · ΔE 25.1Dodgerblue · ΔE 25.9Rebecca purple · ΔE 26.2
Nearest named CSS colourDark slateblue (#483D8B)ΔE 16.29, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#AF7012
Analogous#12A0AF, #2112AF
Triadic#AF1251, #51AF12
Split complementary#AF2112, #A0AF12
Tetradic#AF12A0, #AF7012, #12AF21

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#99BDF4
Lighter +30%#6AA0F0
Lighter +20%#3C82EB
Lighter +10%#1766DD
Darker −10%#0D3C81
Darker −20%#082653
Darker −30%#041124
Darker −40%#000000
More saturated +25%#004DC1
Less saturated −25%#2A5697

Channel breakdown

R18
G81
B175
Red18 (7.1%)
Green81 (31.8%)
Blue175 (68.6%)
Hue215.92°
Saturation (HSL)81.35%
Lightness37.84%
Dominant channelBlue
Hex per channelR 12 · G 51 · B AF

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Every value on this page was computed from “1251af” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.