#2540A3#2540A3

#2540A3 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.6% C 0.163 H 267.1°. Best body text is #FFFFFF at 8.97:1 contrast (WCAG AA passes).

Color values

HEX	#2540A3
RGB	rgb(37, 64, 163)
HSL	hsl(227, 63%, 39%)
HSV	hsv(227, 77%, 64%)
CMYK	cmyk(77.3%, 60.7%, 0%, 36.1%)
CIE-LAB	lab(31.12, 26.50, -56.35)
CIE-LCH	lch(31.12, 62.27, 295.19°)
OKLab	oklab(41.63% -0.0082 -0.1628)
OKLCH	oklch(41.63% 0.163 267.1)
XYZ	xyz(9.2049, 6.7034, 35.4520)
Luminance	0.0670 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540A3 #A38825

analogous

#257FA3 #2540A3 #4925A3

triadic

#2540A3 #A32540 #40A325

tetradic

#2540A3 #A3257F #A38825 #25A349

square

#2540A3 #A3257F #A38825 #25A349

split-complementary

#2540A3 #A34925 #7FA325

monochromatic

#0E193F #1A2C71 #2540A3 #3456D1 #667FDC

Accessibility & contrast

On white

8.97

#2540A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#2540A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540A3

8.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540A3	#FFFFFF	#000000	##FFFFFF
##2540A3	1.00	8.97	2.34	8.97
#FFFFFF	8.97	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.97	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FA6

Deuteranopia (green-blind)

#0044A1

Tritanopia (blue-blind)

#00596B

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #2540a3;
/* rgb */ color: rgb(37, 64, 163);
/* oklch */ color: oklch(41.6% 0.163 267.1);

Tailwind

colors: {
  custom: {
    50: '#7474bf',
    500: '#2540a3',
    950: '#000000',
  },
}

SCSS

$custom: #2540a3;
$custom-light: #7474bf;
$custom-dark: #000000;

JSON

{
  "hex": "#2540a3",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 163
  },
  "hsl": {
    "h": 227.143,
    "s": 63,
    "l": 39.216
  },
  "oklch": {
    "l": 0.41628,
    "c": 0.16301,
    "h": 267.1
  },
  "luminance": 0.06704
}

Semantic roles & 50–950 ramp

primary

#2540A3

secondary

#C2AD62

accent

#C342E6

background

#F7F7FB

surface

#EEEDF7

border

#C9C8D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #2540A3

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

Preview Lab → · Contrast checker → · Palette generator →