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Recognised as Colour

#257DBB

  • #257DBB
  • Blue
  • Dark
  • Nearest: Steel blue

#257DBB is a blue with RGB values 37, 125, 187 and HSL 205°, 67%, 44%. It is a dark colour, so black text on it reaches 4.7:1 contrast (AA for normal text). The nearest named colour is Steel blue.

Colour values

#257DBB#257DBB
HEX#257DBB
RGBrgb(37, 125, 187)
RGB (0–1)0.1451, 0.4902, 0.7333
RGB percentages14.5%, 49%, 73.3%
HSLhsl(204.8, 67%, 43.9%)
HSV / HSBhsv(204.8, 80.2%, 73.3%)
CMYK80.2%, 33.2%, 0%, 26.7%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,457,019
CSS custom property--colour: #257DBB;

Brightness & contrast

Relative luminance0.18648WCAG 2.x, 0 is black and 1 is white
Perceived brightness116.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.73:1
Contrast with white4.44:1WCAG normal text: Fail
Contrast with black4.73:1WCAG normal text: AA
Greyscale equivalent#6F6F6F
Inverted#DA8244

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#607FBEno red cones; affects about 1% of men; ΔE 11.2 from the original
Deuteranopia#4B71BAno green cones; the most common form, about 1% of men; ΔE 13.3 from the original
Tritanopia#008C93no blue cones; rare, and affects men and women equally; ΔE 36.8 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.44:1WCAG large text: AA
Contrast with black, large text4.73:1WCAG large text: AAA

Named colours

Steel blue · ΔE 7.9Cornflower blue · ΔE 19.9Deep skyblue · ΔE 26.5Dodgerblue · ΔE 28.7Light slate grey · ΔE 29.2Slate grey · ΔE 29.3
Nearest named CSS colourSteel blue (#4682B4)ΔE 7.87, clearly different but related
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#BB6325
Analogous#25BBAE, #2532BB
Triadic#BB257D, #7DBB25
Split complementary#BB2532, #BBAE25
Tetradic#AE25BB, #BB6325, #32BB25

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#BBDBF1
Lighter +30%#90C4E9
Lighter +20%#65AEE1
Lighter +10%#3B97D8
Darker −10%#1D6190
Darker −20%#144466
Darker −30%#0C283B
Darker −40%#030B11
More saturated +25%#0982D7
Less saturated −25%#41789F

Channel breakdown

R37
G125
B187
Red37 (14.5%)
Green125 (49%)
Blue187 (73.3%)
Hue204.8°
Saturation (HSL)66.96%
Lightness43.92%
Dominant channelBlue
Hex per channelR 25 · G 7D · B BB

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Every value on this page was computed from “257dbb” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.