#2540A7#2540A7

#2540A7 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.0% C 0.168 H 267.2°. Best body text is #FFFFFF at 8.86:1 contrast (WCAG AA passes).

Color values

HEX	#2540A7
RGB	rgb(37, 64, 167)
HSL	hsl(228, 64%, 40%)
HSV	hsv(228, 78%, 65%)
CMYK	cmyk(77.8%, 61.7%, 0%, 34.5%)
CIE-LAB	lab(31.46, 28.03, -58.20)
CIE-LCH	lch(31.46, 64.60, 295.72°)
OKLab	oklab(41.99% -0.0082 -0.1682)
OKLCH	oklch(41.99% 0.168 267.2)
XYZ	xyz(9.5690, 6.8491, 37.3694)
Luminance	0.0685 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540A7 #A78C25

analogous

#2581A7 #2540A7 #4B25A7

triadic

#2540A7 #A72540 #40A725

tetradic

#2540A7 #A72581 #A78C25 #25A74B

square

#2540A7 #A72581 #A78C25 #25A74B

split-complementary

#2540A7 #A74B25 #81A725

monochromatic

#0F1A43 #1A2D75 #2540A7 #3757D3 #6981DE

Accessibility & contrast

On white

8.86

#2540A7 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#2540A7 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540A7

8.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540A7	#FFFFFF	#000000	##FFFFFF
##2540A7	1.00	8.86	2.37	8.86
#FFFFFF	8.86	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AA

Deuteranopia (green-blind)

#0044A5

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #2540a7;
/* rgb */ color: rgb(37, 64, 167);
/* oklch */ color: oklch(42.0% 0.168 267.2);

Tailwind

colors: {
  custom: {
    50: '#7574c2',
    500: '#2540a7',
    950: '#000000',
  },
}

SCSS

$custom: #2540a7;
$custom-light: #7574c2;
$custom-dark: #000000;

JSON

{
  "hex": "#2540a7",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 167
  },
  "hsl": {
    "h": 227.538,
    "s": 63.725,
    "l": 40
  },
  "oklch": {
    "l": 0.41986,
    "c": 0.16843,
    "h": 267.2
  },
  "luminance": 0.0685
}

Semantic roles & 50–950 ramp

primary

#2540A7

secondary

#C4B064

accent

#C441E7

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #2540A7

Body copy rendered with the generated semantic roles for this colour.

Preview Lab → · Contrast checker → · Palette generator →