#2431B1#2431B1

#2431B1 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 40.3% C 0.199 H 269.5°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#2431B1
RGB	rgb(36, 49, 177)
HSL	hsl(234, 66%, 42%)
HSV	hsv(234, 80%, 69%)
CMYK	cmyk(79.7%, 72.3%, 0%, 30.6%)
CIE-LAB	lab(28.76, 41.20, -68.63)
CIE-LCH	lch(28.76, 80.04, 300.98°)
OKLab	oklab(40.29% -0.0018 -0.1988)
OKLCH	oklch(40.29% 0.199 269.5)
XYZ	xyz(9.7590, 5.7449, 42.1810)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.68

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2431B1 #B1A424

analogous

#2478B1 #2431B1 #5E24B1

triadic

#2431B1 #B12431 #31B124

tetradic

#2431B1 #B12478 #B1A424 #24B15E

square

#2431B1 #B12478 #B1A424 #24B15E

split-complementary

#2431B1 #B15E24 #78B124

monochromatic

#0F154B #1A237E #2431B1 #3B49D7 #6E79E1

Accessibility & contrast

On white

9.77

#2431B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#2431B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2431B1

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2431B1	#FFFFFF	#000000	##FFFFFF
##2431B1	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004BB5

Deuteranopia (green-blind)

#003DAF

Tritanopia (blue-blind)

#00566E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2431b1;
/* rgb */ color: rgb(36, 49, 177);
/* oklch */ color: oklch(40.3% 0.199 269.5);

Tailwind

colors: {
  custom: {
    50: '#786aca',
    500: '#2431b1',
    950: '#000000',
  },
}

SCSS

$custom: #2431b1;
$custom-light: #786aca;
$custom-dark: #000000;

JSON

{
  "hex": "#2431b1",
  "rgb": {
    "r": 36,
    "g": 49,
    "b": 177
  },
  "hsl": {
    "h": 234.468,
    "s": 66.197,
    "l": 41.765
  },
  "oklch": {
    "l": 0.40287,
    "c": 0.1988,
    "h": 269.5
  },
  "luminance": 0.05746
}

Semantic roles & 50–950 ramp

primary

#2431B1

secondary

#C8BF69

accent

#D93FE9

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2431B1

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

Preview Lab → · Contrast checker → · Palette generator →