#2540A6#2540A6

#2540A6 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 41.9% C 0.167 H 267.2°. Best body text is #FFFFFF at 8.89:1 contrast (WCAG AA passes).

Color values

HEX	#2540A6
RGB	rgb(37, 64, 166)
HSL	hsl(227, 64%, 40%)
HSV	hsv(227, 78%, 65%)
CMYK	cmyk(77.7%, 61.4%, 0%, 34.9%)
CIE-LAB	lab(31.38, 27.65, -57.74)
CIE-LCH	lch(31.38, 64.02, 295.59°)
OKLab	oklab(41.9% -0.0082 -0.1669)
OKLCH	oklch(41.9% 0.167 267.2)
XYZ	xyz(9.4769, 6.8122, 36.8844)
Luminance	0.0681 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2540A6 #A68B25

analogous

#2581A6 #2540A6 #4B25A6

triadic

#2540A6 #A62540 #40A625

tetradic

#2540A6 #A62581 #A68B25 #25A64B

square

#2540A6 #A62581 #A68B25 #25A64B

split-complementary

#2540A6 #A64B25 #81A625

monochromatic

#0F1942 #1A2D74 #2540A6 #3657D2 #6881DD

Accessibility & contrast

On white

8.89

#2540A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.36

#2540A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2540A6

8.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2540A6	#FFFFFF	#000000	##FFFFFF
##2540A6	1.00	8.89	2.36	8.89
#FFFFFF	8.89	1.00	21.00	1.00
#000000	2.36	21.00	1.00	21.00
##FFFFFF	8.89	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050A9

Deuteranopia (green-blind)

#0044A4

Tritanopia (blue-blind)

#005A6C

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #2540a6;
/* rgb */ color: rgb(37, 64, 166);
/* oklch */ color: oklch(41.9% 0.167 267.2);

Tailwind

colors: {
  custom: {
    50: '#7474c1',
    500: '#2540a6',
    950: '#000000',
  },
}

SCSS

$custom: #2540a6;
$custom-light: #7474c1;
$custom-dark: #000000;

JSON

{
  "hex": "#2540a6",
  "rgb": {
    "r": 37,
    "g": 64,
    "b": 166
  },
  "hsl": {
    "h": 227.442,
    "s": 63.547,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41896,
    "c": 0.16708,
    "h": 267.2
  },
  "luminance": 0.06813
}

Semantic roles & 50–950 ramp

primary

#2540A6

secondary

#C3AF64

accent

#C441E7

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0812

muted

#7C7B81

Preview Lab

Preview with #2540A6

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

Preview Lab → · Contrast checker → · Palette generator →