#2528B2#2528B2

#2528B2 is a dark, highly saturated blue. Relative luminance 0.051; OKLCH L 39.1% C 0.208 H 270.6°. Best body text is #FFFFFF at 10.37:1 contrast (WCAG AA passes).

Color values

HEX	#2528B2
RGB	rgb(37, 40, 178)
HSL	hsl(239, 66%, 42%)
HSV	hsv(239, 79%, 70%)
CMYK	cmyk(79.2%, 77.5%, 0%, 30.2%)
CIE-LAB	lab(27.09, 46.77, -71.99)
CIE-LCH	lch(27.09, 85.85, 303.01°)
OKLab	oklab(39.14% 0.0023 -0.2085)
OKLCH	oklch(39.14% 0.208 270.6)
XYZ	xyz(9.5549, 5.1242, 42.5963)
Luminance	0.0512 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2528B2 #B2AF25

analogous

#256FB2 #2528B2 #6825B2

triadic

#2528B2 #B22528 #28B225

tetradic

#2528B2 #B2256F #B2AF25 #25B268

square

#2528B2 #B2256F #B2AF25 #25B268

split-complementary

#2528B2 #B26825 #6FB225

monochromatic

#10114D #1A1D7F #2528B2 #3D41D7 #7073E1

Accessibility & contrast

On white

10.37

#2528B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#2528B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2528B2

10.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2528B2	#FFFFFF	#000000	##FFFFFF
##2528B2	1.00	10.37	2.03	10.37
#FFFFFF	10.37	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047B6

Deuteranopia (green-blind)

#0039B0

Tritanopia (blue-blind)

#00526C

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #2528b2;
/* rgb */ color: rgb(37, 40, 178);
/* oklch */ color: oklch(39.1% 0.208 270.6);

Tailwind

colors: {
  custom: {
    50: '#7a64ca',
    500: '#2528b2',
    950: '#000000',
  },
}

SCSS

$custom: #2528b2;
$custom-light: #7a64ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2528b2",
  "rgb": {
    "r": 37,
    "g": 40,
    "b": 178
  },
  "hsl": {
    "h": 238.723,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.39142,
    "c": 0.20848,
    "h": 270.6
  },
  "luminance": 0.05125
}

Semantic roles & 50–950 ramp

primary

#2528B2

secondary

#C8C66B

accent

#E53FE9

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2528B2

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

Preview Lab → · Contrast checker → · Palette generator →