#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
RGBrgb(37, 64, 173)
HSLhsl(228, 65%, 41%)
HSVhsv(228, 79%, 68%)
CMYKcmyk(78.6%, 63%, 0%, 32.2%)
CIE-LABlab(31.98, 30.30, -60.94)
CIE-LCHlch(31.98, 68.06, 296.44°)
OKLaboklab(42.53% -0.0082 -0.1763)
OKLCHoklch(42.53% 0.176 267.3)
XYZxyz(10.1365, 7.0761, 40.3586)
Luminance0.0708 (WCAG relative)
Temperaturecool
Familyblue

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
##2540AD1.008.692.428.69
#FFFFFF8.691.0021.001.00
#0000002.4221.001.0021.00
##FFFFFF8.691.0021.001.00

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 →

#2540AD Color — HEX, RGB, HSL, OKLCH & Contrast — Tintiva