#2531B2#2531B2

#2531B2 is a dark, vivid blue. Relative luminance 0.058; OKLCH L 40.4% C 0.200 H 269.7°. Best body text is #FFFFFF at 9.72:1 contrast (WCAG AA passes).

Color values

HEX	#2531B2
RGB	rgb(37, 49, 178)
HSL	hsl(235, 66%, 42%)
HSV	hsv(235, 79%, 70%)
CMYK	cmyk(79.2%, 72.5%, 0%, 30.2%)
CIE-LAB	lab(28.91, 41.63, -68.97)
CIE-LCH	lch(28.91, 80.56, 301.11°)
OKLab	oklab(40.44% -0.001 -0.1998)
OKLCH	oklch(40.44% 0.2 269.7)
XYZ	xyz(9.8944, 5.8032, 42.7095)
Luminance	0.0580 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.53

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2531B2 #B2A625

analogous

#2577B2 #2531B2 #6025B2

triadic

#2531B2 #B22531 #31B225

tetradic

#2531B2 #B22577 #B2A625 #25B260

square

#2531B2 #B22577 #B2A625 #25B260

split-complementary

#2531B2 #B26025 #77B225

monochromatic

#10154D #1A237F #2531B2 #3D4AD7 #707AE1

Accessibility & contrast

On white

9.72

#2531B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#2531B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2531B2

9.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2531B2	#FFFFFF	#000000	##FFFFFF
##2531B2	1.00	9.72	2.16	9.72
#FFFFFF	9.72	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB6

Deuteranopia (green-blind)

#003DB0

Tritanopia (blue-blind)

#00566E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2531b2;
/* rgb */ color: rgb(37, 49, 178);
/* oklch */ color: oklch(40.4% 0.200 269.7);

Tailwind

colors: {
  custom: {
    50: '#796aca',
    500: '#2531b2',
    950: '#000000',
  },
}

SCSS

$custom: #2531b2;
$custom-light: #796aca;
$custom-dark: #000000;

JSON

{
  "hex": "#2531b2",
  "rgb": {
    "r": 37,
    "g": 49,
    "b": 178
  },
  "hsl": {
    "h": 234.894,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.40439,
    "c": 0.19978,
    "h": 269.7
  },
  "luminance": 0.05804
}

Semantic roles & 50–950 ramp

primary

#2531B2

secondary

#C8C06B

accent

#DA3FE9

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2531B2

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

Preview Lab → · Contrast checker → · Palette generator →