#2540AD#2540AD

#2540AD is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.5% C 0.176 H 267.3°. Best body text is #FFFFFF at 8.69:1 contrast (WCAG AA passes).

Color values

HEX	#2540AD
RGB	rgb(37, 64, 173)
HSL	hsl(228, 65%, 41%)
HSV	hsv(228, 79%, 68%)
CMYK	cmyk(78.6%, 63%, 0%, 32.2%)
CIE-LAB	lab(31.98, 30.30, -60.94)
CIE-LCH	lch(31.98, 68.06, 296.44°)
OKLab	oklab(42.53% -0.0082 -0.1763)
OKLCH	oklch(42.53% 0.176 267.3)
XYZ	xyz(10.1365, 7.0761, 40.3586)
Luminance	0.0708 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540AD #AD9225

analogous

#2584AD #2540AD #4E25AD

triadic

#2540AD #AD2540 #40AD25

tetradic

#2540AD #AD2584 #AD9225 #25AD4E

square

#2540AD #AD2584 #AD9225 #25AD4E

split-complementary

#2540AD #AD4E25 #84AD25

monochromatic

#0F1B48 #1A2D7B #2540AD #3A59D5 #6D84E0

Accessibility & contrast

On white

8.69

#2540AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#2540AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540AD

8.69:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540AD	#FFFFFF	#000000	##FFFFFF
##2540AD	1.00	8.69	2.42	8.69
#FFFFFF	8.69	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.69	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B1

Deuteranopia (green-blind)

#0045AB

Tritanopia (blue-blind)

#005C70

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #2540ad;
/* rgb */ color: rgb(37, 64, 173);
/* oklch */ color: oklch(42.5% 0.176 267.3);

Tailwind

colors: {
  custom: {
    50: '#7674c6',
    500: '#2540ad',
    950: '#000000',
  },
}

SCSS

$custom: #2540ad;
$custom-light: #7674c6;
$custom-dark: #000000;

JSON

{
  "hex": "#2540ad",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 173
  },
  "hsl": {
    "h": 228.088,
    "s": 64.762,
    "l": 41.176
  },
  "oklch": {
    "l": 0.4253,
    "c": 0.17646,
    "h": 267.3
  },
  "luminance": 0.07077
}

Semantic roles & 50–950 ramp

primary

#2540AD

secondary

#C6B368

accent

#C640E8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2540AD

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

Preview Lab → · Contrast checker → · Palette generator →