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Recognised as Colour

#257CD8

  • #257CD8
  • Blue
  • Dark
  • Nearest: Cornflower blue

#257CD8 is a blue with RGB values 37, 124, 216 and HSL 211°, 71%, 50%. It is a dark colour, so black text on it reaches 5:1 contrast (AA for normal text). The nearest named colour is Cornflower blue.

Colour values

#257CD8#257CD8
HEX#257CD8
RGBrgb(37, 124, 216)
RGB (0–1)0.1451, 0.4863, 0.8471
RGB percentages14.5%, 48.6%, 84.7%
HSLhsl(210.8, 70.8%, 49.6%)
HSV / HSBhsv(210.8, 82.9%, 84.7%)
CMYK82.9%, 42.6%, 0%, 15.3%≈naive device-independent conversion; real print needs an ICC profile
24-bit integer2,456,792
CSS custom property--colour: #257CD8;

Brightness & contrast

Relative luminance0.19766WCAG 2.x, 0 is black and 1 is white
Perceived brightness121.5 of 255ITU-R BT.601 weighting
Light or darkDark
Best text colour on this backgroundBlackcontrast 4.95:1
Contrast with white4.24:1WCAG normal text: Fail
Contrast with black4.95:1WCAG normal text: AA
Greyscale equivalent#707070
Inverted#DA8327

Colour vision & accessibility

Normal visionProtanopiaDeuteranopiaTritanopia
Protanopia#4D83DCno red cones; affects about 1% of men; ΔE 5.3 from the original
Deuteranopia#2B74D6no green cones; the most common form, about 1% of men; ΔE 5.8 from the original
Tritanopia#00929Fno blue cones; rare, and affects men and women equally; ΔE 52.1 from the original
Distinguishable without hueShifts in lightness toonever rely on hue alone to carry meaning
Contrast with white, large text4.24:1WCAG large text: AA
Contrast with black, large text4.95:1WCAG large text: AAA

Named colours

Cornflower blue · ΔE 11.5Dodgerblue · ΔE 12.2Royal blue · ΔE 21.7Steel blue · ΔE 25.1Slate blue · ΔE 29Medium purple · ΔE 29.4
Nearest named CSS colourCornflower blue (#6495ED)ΔE 11.54, a distinctly different colour
Hue familyblue
CSS keyword usableNo exact keyword

Colour harmonies

base+30°+90°+120°+180°+210°+240°+270°+330°
Complementary#D88125
Analogous#25D5D8, #2825D8
Triadic#D8257C, #7CD825
Split complementary#D82825, #D5D825
Tetradic#D825D5, #D88125, #25D828

Tints, shades & saturation

+40%+30%+20%+10%base-10%-20%-30%-40%
Lighter +40%#D2E4F7
Lighter +30%#A6CAF0
Lighter +20%#7BB0E8
Lighter +10%#4F96E1
Darker −10%#1E63AC
Darker −20%#164A81
Darker −30%#0F3155
Darker −40%#07182A
More saturated +25%#057BF8
Less saturated −25%#457DB8

Channel breakdown

R37
G124
B216
Red37 (14.5%)
Green124 (48.6%)
Blue216 (84.7%)
Hue210.84°
Saturation (HSL)70.75%
Lightness49.61%
Dominant channelBlue
Hex per channelR 25 · G 7C · B D8

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Every value on this page was computed from “257cd8” by Nerdulator’s colour engine. Nothing here was retrieved from a database of answers or written by a model.