#2540AF#2540AF

#2540AF is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.7% C 0.179 H 267.4°. Best body text is #FFFFFF at 8.64:1 contrast (WCAG AA passes).

Color values

HEX	#2540AF
RGB	rgb(37, 64, 175)
HSL	hsl(228, 65%, 42%)
HSV	hsv(228, 79%, 69%)
CMYK	cmyk(78.9%, 63.4%, 0%, 31.4%)
CIE-LAB	lab(32.16, 31.06, -61.85)
CIE-LCH	lch(32.16, 69.21, 296.66°)
OKLab	oklab(42.71% -0.0083 -0.1789)
OKLCH	oklch(42.71% 0.179 267.4)
XYZ	xyz(10.3315, 7.1541, 41.3855)
Luminance	0.0716 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540AF #AF9425

analogous

#2585AF #2540AF #4F25AF

triadic

#2540AF #AF2540 #40AF25

tetradic

#2540AF #AF2585 #AF9425 #25AF4F

square

#2540AF #AF2585 #AF9425 #25AF4F

split-complementary

#2540AF #AF4F25 #85AF25

monochromatic

#101B4A #1A2E7C #2540AF #3C5AD6 #6E84E0

Accessibility & contrast

On white

8.64

#2540AF on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.43

#2540AF on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540AF

8.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540AF	#FFFFFF	#000000	##FFFFFF
##2540AF	1.00	8.64	2.43	8.64
#FFFFFF	8.64	1.00	21.00	1.00
#000000	2.43	21.00	1.00	21.00
##FFFFFF	8.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B3

Deuteranopia (green-blind)

#0045AD

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #2540af;
/* rgb */ color: rgb(37, 64, 175);
/* oklch */ color: oklch(42.7% 0.179 267.4);

Tailwind

colors: {
  custom: {
    50: '#7774c8',
    500: '#2540af',
    950: '#000000',
  },
}

SCSS

$custom: #2540af;
$custom-light: #7774c8;
$custom-dark: #000000;

JSON

{
  "hex": "#2540af",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 175
  },
  "hsl": {
    "h": 228.261,
    "s": 65.094,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42714,
    "c": 0.17912,
    "h": 267.4
  },
  "luminance": 0.07155
}

Semantic roles & 50–950 ramp

primary

#2540AF

secondary

#C7B469

accent

#C740E8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #2540AF

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

Preview Lab → · Contrast checker → · Palette generator →