#2540BC#2540BC

#2540BC is a dark, vivid blue. Relative luminance 0.077; OKLCH L 43.9% C 0.196 H 267.4°. Best body text is #FFFFFF at 8.27:1 contrast (WCAG AA passes).

Color values

HEX	#2540BC
RGB	rgb(37, 64, 188)
HSL	hsl(229, 67%, 44%)
HSV	hsv(229, 80%, 74%)
CMYK	cmyk(80.3%, 66%, 0%, 26.3%)
CIE-LAB	lab(33.33, 35.89, -67.63)
CIE-LCH	lch(33.33, 76.56, 297.96°)
OKLab	oklab(43.94% -0.0087 -0.1958)
OKLCH	oklch(43.94% 0.196 267.4)
XYZ	xyz(11.6703, 7.6896, 48.4364)
Luminance	0.0769 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.00

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540BC #BCA125

analogous

#258BBC #2540BC #5625BC

triadic

#2540BC #BC2540 #40BC25

tetradic

#2540BC #BC258B #BCA125 #25BC56

square

#2540BC #BC258B #BCA125 #25BC56

split-complementary

#2540BC #BC5625 #8BBC25

monochromatic

#111D56 #1B2F89 #2540BC #445FDA #778BE4

Accessibility & contrast

On white

8.27

#2540BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.54

#2540BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540BC

8.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540BC	#FFFFFF	#000000	##FFFFFF
##2540BC	1.00	8.27	2.54	8.27
#FFFFFF	8.27	1.00	21.00	1.00
#000000	2.54	21.00	1.00	21.00
##FFFFFF	8.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0056C0

Deuteranopia (green-blind)

#0047BA

Tritanopia (blue-blind)

#006178

Achromatopsia (no color)

#4E4E4E

Design tokens & code

CSS

--color: #2540bc;
/* rgb */ color: rgb(37, 64, 188);
/* oklch */ color: oklch(43.9% 0.196 267.4);

Tailwind

colors: {
  custom: {
    50: '#7a74d1',
    500: '#2540bc',
    950: '#000000',
  },
}

SCSS

$custom: #2540bc;
$custom-light: #7a74d1;
$custom-dark: #000000;

JSON

{
  "hex": "#2540bc",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 188
  },
  "hsl": {
    "h": 229.272,
    "s": 67.111,
    "l": 44.118
  },
  "oklch": {
    "l": 0.43936,
    "c": 0.19602,
    "h": 267.4
  },
  "luminance": 0.07691
}

Semantic roles & 50–950 ramp

primary

#2540BC

secondary

#CCBC71

accent

#CB3EEA

background

#F8F7FD

surface

#EFEDFA

border

#CAC8D3

text

#0B0814

muted

#7C7B83

Preview Lab

Preview with #2540BC

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

Preview Lab → · Contrast checker → · Palette generator →