#2528B1#2528B1

#2528B1 is a dark, highly saturated blue. Relative luminance 0.051; OKLCH L 39.0% C 0.207 H 270.7°. Best body text is #FFFFFF at 10.41:1 contrast (WCAG AA passes).

Color values

HEX	#2528B1
RGB	rgb(37, 40, 177)
HSL	hsl(239, 65%, 42%)
HSV	hsv(239, 79%, 69%)
CMYK	cmyk(79.1%, 77.4%, 0%, 30.6%)
CIE-LAB	lab(26.97, 46.44, -71.58)
CIE-LCH	lch(26.97, 85.32, 302.98°)
OKLab	oklab(39.03% 0.0025 -0.2073)
OKLCH	oklch(39.03% 0.207 270.7)
XYZ	xyz(9.4549, 5.0842, 42.0695)
Luminance	0.0508 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2528B1 #B1AE25

analogous

#256EB1 #2528B1 #6825B1

triadic

#2528B1 #B12528 #28B125

tetradic

#2528B1 #B1256E #B1AE25 #25B168

square

#2528B1 #B1256E #B1AE25 #25B168

split-complementary

#2528B1 #B16825 #6EB125

monochromatic

#10114C #1A1D7E #2528B1 #3D40D6 #6F72E1

Accessibility & contrast

On white

10.41

#2528B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#2528B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2528B1

10.41:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2528B1	#FFFFFF	#000000	##FFFFFF
##2528B1	1.00	10.41	2.02	10.41
#FFFFFF	10.41	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.41	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047B5

Deuteranopia (green-blind)

#0039AF

Tritanopia (blue-blind)

#00516B

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2528b1;
/* rgb */ color: rgb(37, 40, 177);
/* oklch */ color: oklch(39.0% 0.207 270.7);

Tailwind

colors: {
  custom: {
    50: '#7964ca',
    500: '#2528b1',
    950: '#000000',
  },
}

SCSS

$custom: #2528b1;
$custom-light: #7964ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2528b1",
  "rgb": {
    "r": 37,
    "g": 40,
    "b": 177
  },
  "hsl": {
    "h": 238.714,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.3903,
    "c": 0.20729,
    "h": 270.7
  },
  "luminance": 0.05085
}

Semantic roles & 50–950 ramp

primary

#2528B1

secondary

#C8C66A

accent

#E53FE8

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2528B1

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

Preview Lab → · Contrast checker → · Palette generator →