#2531A5#2531A5

#2531A5 is a dark, vivid blue. Relative luminance 0.053; OKLCH L 39.1% C 0.183 H 270.2°. Best body text is #FFFFFF at 10.19:1 contrast (WCAG AA passes).

Color values

HEX	#2531A5
RGB	rgb(37, 49, 165)
HSL	hsl(234, 63%, 40%)
HSV	hsv(234, 78%, 65%)
CMYK	cmyk(77.6%, 70.3%, 0%, 35.3%)
CIE-LAB	lab(27.59, 37.03, -63.35)
CIE-LCH	lch(27.59, 73.37, 300.31°)
OKLab	oklab(39.09% 0.0006 -0.1834)
OKLCH	oklch(39.09% 0.183 270.2)
XYZ	xyz(8.6505, 5.3056, 36.1582)
Luminance	0.0531 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2531A5 #A59925

analogous

#2571A5 #2531A5 #5925A5

triadic

#2531A5 #A52531 #31A525

tetradic

#2531A5 #A52571 #A59925 #25A559

square

#2531A5 #A52571 #A59925 #25A559

split-complementary

#2531A5 #A55925 #71A525

monochromatic

#0F1341 #1A2273 #2531A5 #3544D2 #6772DD

Accessibility & contrast

On white

10.19

#2531A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.06

#2531A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2531A5

10.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2531A5	#FFFFFF	#000000	##FFFFFF
##2531A5	1.00	10.19	2.06	10.19
#FFFFFF	10.19	1.00	21.00	1.00
#000000	2.06	21.00	1.00	21.00
##FFFFFF	10.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047A9

Deuteranopia (green-blind)

#003BA3

Tritanopia (blue-blind)

#005167

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #2531a5;
/* rgb */ color: rgb(37, 49, 165);
/* oklch */ color: oklch(39.1% 0.183 270.2);

Tailwind

colors: {
  custom: {
    50: '#7569c1',
    500: '#2531a5',
    950: '#000000',
  },
}

SCSS

$custom: #2531a5;
$custom-light: #7569c1;
$custom-dark: #000000;

JSON

{
  "hex": "#2531a5",
  "rgb": {
    "r": 37,
    "g": 49,
    "b": 165
  },
  "hsl": {
    "h": 234.375,
    "s": 63.366,
    "l": 39.608
  },
  "oklch": {
    "l": 0.39091,
    "c": 0.18339,
    "h": 270.2
  },
  "luminance": 0.05307
}

Semantic roles & 50–950 ramp

primary

#2531A5

secondary

#C3BA63

accent

#D741E6

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0612

muted

#7C7A81

Preview Lab

Preview with #2531A5

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

Preview Lab → · Contrast checker → · Palette generator →