#2537A3#2537A3

#2537A3 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.9% C 0.174 H 269.2°. Best body text is #FFFFFF at 9.75:1 contrast (WCAG AA passes).

Color values

HEX	#2537A3
RGB	rgb(37, 55, 163)
HSL	hsl(231, 63%, 39%)
HSV	hsv(231, 77%, 64%)
CMYK	cmyk(77.3%, 66.3%, 0%, 36.1%)
CIE-LAB	lab(28.82, 32.46, -60.11)
CIE-LCH	lch(28.82, 68.31, 298.37°)
OKLab	oklab(39.93% -0.0025 -0.1739)
OKLCH	oklch(39.93% 0.174 269.2)
XYZ	xyz(8.7377, 5.7691, 35.2963)
Luminance	0.0577 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2537A3 #A39125

analogous

#2576A3 #2537A3 #5225A3

triadic

#2537A3 #A32537 #37A325

tetradic

#2537A3 #A32576 #A39125 #25A352

square

#2537A3 #A32576 #A39125 #25A352

split-complementary

#2537A3 #A35225 #76A325

monochromatic

#0E153F #1A2671 #2537A3 #344BD1 #6677DC

Accessibility & contrast

On white

9.75

#2537A3 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#2537A3 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2537A3

9.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2537A3	#FFFFFF	#000000	##FFFFFF
##2537A3	1.00	9.75	2.15	9.75
#FFFFFF	9.75	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AA6

Deuteranopia (green-blind)

#003EA1

Tritanopia (blue-blind)

#005468

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2537a3;
/* rgb */ color: rgb(37, 55, 163);
/* oklch */ color: oklch(39.9% 0.174 269.2);

Tailwind

colors: {
  custom: {
    50: '#746ebf',
    500: '#2537a3',
    950: '#000000',
  },
}

SCSS

$custom: #2537a3;
$custom-light: #746ebf;
$custom-dark: #000000;

JSON

{
  "hex": "#2537a3",
  "rgb": {
    "r": 37,
    "g": 55,
    "b": 163
  },
  "hsl": {
    "h": 231.429,
    "s": 63,
    "l": 39.216
  },
  "oklch": {
    "l": 0.3993,
    "c": 0.17393,
    "h": 269.2
  },
  "luminance": 0.0577
}

Semantic roles & 50–950 ramp

primary

#2537A3

secondary

#C2B462

accent

#CF42E6

background

#F7F6FB

surface

#EEEBF7

border

#C9C6D0

text

#0A0712

muted

#7C7A81

Preview Lab

Preview with #2537A3

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

Preview Lab → · Contrast checker → · Palette generator →