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Recognised as Colour

#1591CF

  • #1591CF
  • Blue
  • Dark
  • Nearest: Steel blue

#1591CF is a blue with RGB values 21, 145, 207 and HSL 200°, 82%, 45%. It is a dark colour, so black text on it reaches 6:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#1591CF#1591CF
HEX#1591CF
RGBrgb(21, 145, 207)
RGB (0–1)0.0824, 0.5686, 0.8118
RGB percentages8.2%, 56.9%, 81.2%
HSLhsl(200, 81.6%, 44.7%)
HSV / HSBhsv(200, 89.9%, 81.2%)
CMYK89.9%, 30%, 0%, 18.8%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer1,413,583
CSS custom property--colour: #1591CF;

Brightness & contrast

Relative luminance0.24915WCAG 2.x, 0 is black and 1 is white
Perceived brightness131.8 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 5.98:1
Contrast with white3.51:1WCAG normal text: Fail
Contrast with black5.98:1WCAG normal text: AA
Greyscale equivalent#7B7B7B
Inverted#EA6E30

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#7392D2no red cones; affects about 1% of men; ΔE 16.2 from the original
Deuteranopia#5B82CEno green cones; the most common form, about 1% of men; ΔE 18.2 from the original
Tritanopia#00A1A7no blue cones; rare, and affects men and women equally; ΔE 36 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text3.51:1WCAG large text: AA
Contrast with black, large text5.98:1WCAG large text: AAA

Named colours

Steel blue · ΔE 10.7Deep skyblue · ΔE 17.9Cornflower blue · ΔE 21Light skyblue · ΔE 25.8Dodgerblue · ΔE 29.8Sky blue · ΔE 30
Nearest named CSS colourSteel blue (#4682B4)ΔE 10.72, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#CF5315
Analogous#15CFB0, #1534CF
Triadic#CF1591, #91CF15
Split complementary#CF1534, #CFB015
Tetradic#B015CF, #CF5315, #34CF15

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#B8E3F8
Lighter +30%#8AD0F3
Lighter +20%#5CBDEE
Lighter +10%#2DABEA
Darker −10%#1071A1
Darker −20%#0C5072
Darker −30%#073044
Darker −40%#020F16
More saturated +25%#0098E4
Less saturated −25%#3287B3

Channel breakdown

R21
G145
B207
Red21 (8.2%)
Green145 (56.9%)
Blue207 (81.2%)
Hue200°
Saturation (HSL)81.58%
Lightness44.71%
Dominant channelBlue
Hex per channelR 15 · G 91 · B CF

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Every value on this page was computed from “1591cf” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.