#2537B0#2537B0

#2537B0 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 41.2% C 0.191 H 269.0°. Best body text is #FFFFFF at 9.33:1 contrast (WCAG AA passes).

Color values

HEX	#2537B0
RGB	rgb(37, 55, 176)
HSL	hsl(232, 65%, 42%)
HSV	hsv(232, 79%, 69%)
CMYK	cmyk(79%, 68.8%, 0%, 31%)
CIE-LAB	lab(30.06, 37.23, -65.89)
CIE-LCH	lch(30.06, 75.68, 299.47°)
OKLab	oklab(41.21% -0.0035 -0.1908)
OKLCH	oklch(41.21% 0.191 269)
XYZ	xyz(9.9629, 6.2591, 41.7489)
Luminance	0.0626 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2537B0 #B09E25

analogous

#257DB0 #2537B0 #5925B0

triadic

#2537B0 #B02537 #37B025

tetradic

#2537B0 #B0257D #B09E25 #25B059

square

#2537B0 #B0257D #B09E25 #25B059

split-complementary

#2537B0 #B05925 #7DB025

monochromatic

#10174B #1A277D #2537B0 #3C50D6 #6F7DE1

Accessibility & contrast

On white

9.33

#2537B0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#2537B0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2537B0

9.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2537B0	#FFFFFF	#000000	##FFFFFF
##2537B0	1.00	9.33	2.25	9.33
#FFFFFF	9.33	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB4

Deuteranopia (green-blind)

#0040AE

Tritanopia (blue-blind)

#00586F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #2537b0;
/* rgb */ color: rgb(37, 55, 176);
/* oklch */ color: oklch(41.2% 0.191 269.0);

Tailwind

colors: {
  custom: {
    50: '#786ec9',
    500: '#2537b0',
    950: '#000000',
  },
}

SCSS

$custom: #2537b0;
$custom-light: #786ec9;
$custom-dark: #000000;

JSON

{
  "hex": "#2537b0",
  "rgb": {
    "r": 37,
    "g": 55,
    "b": 176
  },
  "hsl": {
    "h": 232.23,
    "s": 65.258,
    "l": 41.765
  },
  "oklch": {
    "l": 0.41206,
    "c": 0.19083,
    "h": 269
  },
  "luminance": 0.0626
}

Semantic roles & 50–950 ramp

primary

#2537B0

secondary

#C7BB6A

accent

#D240E8

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #2537B0

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

Preview Lab → · Contrast checker → · Palette generator →