#2540AE#2540AE

#2540AE is a dark, vivid blue. Relative luminance 0.071; OKLCH L 42.6% C 0.178 H 267.3°. Best body text is #FFFFFF at 8.67:1 contrast (WCAG AA passes).

Color values

HEX	#2540AE
RGB	rgb(37, 64, 174)
HSL	hsl(228, 65%, 41%)
HSV	hsv(228, 79%, 68%)
CMYK	cmyk(78.7%, 63.2%, 0%, 31.8%)
CIE-LAB	lab(32.07, 30.68, -61.40)
CIE-LCH	lch(32.07, 68.64, 296.55°)
OKLab	oklab(42.62% -0.0082 -0.1776)
OKLCH	oklch(42.62% 0.178 267.3)
XYZ	xyz(10.2337, 7.1149, 40.8702)
Luminance	0.0712 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540AE #AE9325

analogous

#2585AE #2540AE #4F25AE

triadic

#2540AE #AE2540 #40AE25

tetradic

#2540AE #AE2585 #AE9325 #25AE4F

square

#2540AE #AE2585 #AE9325 #25AE4F

split-complementary

#2540AE #AE4F25 #85AE25

monochromatic

#101B49 #1A2D7C #2540AE #3B59D5 #6D84E0

Accessibility & contrast

On white

8.67

#2540AE on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.42

#2540AE on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540AE

8.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540AE	#FFFFFF	#000000	##FFFFFF
##2540AE	1.00	8.67	2.42	8.67
#FFFFFF	8.67	1.00	21.00	1.00
#000000	2.42	21.00	1.00	21.00
##FFFFFF	8.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B2

Deuteranopia (green-blind)

#0045AC

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #2540ae;
/* rgb */ color: rgb(37, 64, 174);
/* oklch */ color: oklch(42.6% 0.178 267.3);

Tailwind

colors: {
  custom: {
    50: '#7674c7',
    500: '#2540ae',
    950: '#000000',
  },
}

SCSS

$custom: #2540ae;
$custom-light: #7674c7;
$custom-dark: #000000;

JSON

{
  "hex": "#2540ae",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 174
  },
  "hsl": {
    "h": 228.175,
    "s": 64.929,
    "l": 41.373
  },
  "oklch": {
    "l": 0.42622,
    "c": 0.17779,
    "h": 267.3
  },
  "luminance": 0.07116
}

Semantic roles & 50–950 ramp

primary

#2540AE

secondary

#C6B468

accent

#C740E8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2540AE

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

Preview Lab → · Contrast checker → · Palette generator →