#243A7B#243A7B

#243A7B is a dark, moderate blue. Relative luminance 0.048; OKLCH L 37.0% C 0.114 H 266.7°. Best body text is #FFFFFF at 10.68:1 contrast (WCAG AA passes).

Color values

HEX	#243A7B
RGB	rgb(36, 58, 123)
HSL	hsl(225, 55%, 31%)
HSV	hsv(225, 71%, 48%)
CMYK	cmyk(70.7%, 52.8%, 0%, 51.8%)
CIE-LAB	lab(26.25, 14.91, -39.63)
CIE-LCH	lch(26.25, 42.34, 290.63°)
OKLab	oklab(36.96% -0.0065 -0.1138)
OKLCH	oklch(36.96% 0.114 266.7)
XYZ	xyz(5.8145, 4.8307, 19.3610)
Luminance	0.0483 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243A7B #7B6524

analogous

#24657B #243A7B #39247B

triadic

#243A7B #7B243A #3A7B24

tetradic

#243A7B #7B2465 #7B6524 #247B39

square

#243A7B #7B2465 #7B6524 #247B39

split-complementary

#243A7B #7B3924 #657B24

monochromatic

#080D1C #16244C #243A7B #3250AA #4E6ECB

Accessibility & contrast

On white

10.68

#243A7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.97

#243A7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243A7B

10.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243A7B	#FFFFFF	#000000	##FFFFFF
##243A7B	1.00	10.68	1.97	10.68
#FFFFFF	10.68	1.00	21.00	1.00
#000000	1.97	21.00	1.00	21.00
##FFFFFF	10.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#13427D

Deuteranopia (green-blind)

#003A7A

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243a7b;
/* rgb */ color: rgb(36, 58, 123);
/* oklch */ color: oklch(37.0% 0.114 266.7);

Tailwind

colors: {
  custom: {
    50: '#6a6fa2',
    500: '#243a7b',
    950: '#000000',
  },
}

SCSS

$custom: #243a7b;
$custom-light: #6a6fa2;
$custom-dark: #000000;

JSON

{
  "hex": "#243a7b",
  "rgb": {
    "r": 36,
    "g": 58,
    "b": 123
  },
  "hsl": {
    "h": 224.828,
    "s": 54.717,
    "l": 31.176
  },
  "oklch": {
    "l": 0.36958,
    "c": 0.11395,
    "h": 266.7
  },
  "luminance": 0.04831
}

Semantic roles & 50–950 ramp

primary

#243A7B

secondary

#AD954D

accent

#B94ADE

background

#F6F6FA

surface

#ECECF3

border

#C7C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #243A7B

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

Preview Lab → · Contrast checker → · Palette generator →