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Recognised as Colour

#00257F

  • #00257F
  • Blue
  • Dark
  • Nearest: Midnight blue

#00257F is a blue with RGB values 0, 37, 127 and HSL 223°, 100%, 25%. It is a dark colour, so white text on it reaches 13.4:1 contrast (AAA for normal text). The nearest named colour is Midnight blue.

Colour values

#00257F#00257F
HEX#00257F
RGBrgb(0, 37, 127)
RGB (0–1)0, 0.1451, 0.498
RGB percentages0%, 14.5%, 49.8%
HSLhsl(222.5, 100%, 24.9%)
HSV / HSBhsv(222.5, 100%, 49.8%)
CMYK100%, 70.9%, 0%, 50.2%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer9,599
CSS custom property--colour: #00257F;

Brightness & contrast

Relative luminance0.02855WCAG 2.x, 0 is black and 1 is white
Perceived brightness51.4 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundWhitecontrast 13.37:1
Contrast with white13.37:1WCAG normal text: AAA
Contrast with black1.57:1WCAG normal text: Fail
Greyscale equivalent#242424
Inverted#FFDA80

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#003582no red cones; affects about 1% of men; ΔE 12.6 from the original
Deuteranopia#00297Dno green cones; the most common form, about 1% of men; ΔE 4.6 from the original
Tritanopia#003E4Fno blue cones; rare, and affects men and women equally; ΔE 54.4 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text13.37:1WCAG large text: AAA
Contrast with black, large text1.57:1WCAG large text: Fail

Named colours

Midnight blue · ΔE 6.4Dark slateblue · ΔE 16.1Rebecca purple · ΔE 21Navy · ΔE 23.5Indigo · ΔE 23.8Slate blue · ΔE 27.5
Nearest named CSS colourMidnight blue (#191970)ΔE 6.4, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#7F5A00
Analogous#00657F, #1A007F
Triadic#7F0025, #257F00
Split complementary#7F1A00, #657F00
Tetradic#7F0065, #7F5A00, #007F1B

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#4C80FF
Lighter +30%#195CFF
Lighter +20%#0043E5
Lighter +10%#0034B2
Darker −10%#00164C
Darker −20%#000719
Darker −30%#000000
Darker −40%#000000
More saturated +25%#00257F
Less saturated −25%#102C6F

Channel breakdown

R0
G37
B127
Red0 (0%)
Green37 (14.5%)
Blue127 (49.8%)
Hue222.52°
Saturation (HSL)100%
Lightness24.9%
Dominant channelBlue
Hex per channelR 00 · G 25 · B 7F

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Every value on this page was computed from “00257f” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.