#243B74#243B74

#243B74 is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.102 H 265.2°. Best body text is #FFFFFF at 10.75:1 contrast (WCAG AA passes).

Color values

HEX	#243B74
RGB	rgb(36, 59, 116)
HSL	hsl(223, 53%, 30%)
HSV	hsv(223, 69%, 45%)
CMYK	cmyk(69%, 49.1%, 0%, 54.5%)
CIE-LAB	lab(26.05, 11.47, -35.52)
CIE-LCH	lch(26.05, 37.32, 287.90°)
OKLab	oklab(36.65% -0.0085 -0.1016)
OKLCH	oklch(36.65% 0.102 265.2)
XYZ	xyz(5.4428, 4.7634, 17.1522)
Luminance	0.0476 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B74 #745D24

analogous

#246374 #243B74 #352474

triadic

#243B74 #74243B #3B7424

tetradic

#243B74 #742463 #745D24 #247435

square

#243B74 #742463 #745D24 #247435

split-complementary

#243B74 #743524 #637424

monochromatic

#070C17 #162345 #243B74 #3253A3 #4B6FC7

Accessibility & contrast

On white

10.75

#243B74 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#243B74 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B74

10.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B74	#FFFFFF	#000000	##FFFFFF
##243B74	1.00	10.75	1.95	10.75
#FFFFFF	10.75	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E4276

Deuteranopia (green-blind)

#0E3A73

Tritanopia (blue-blind)

#004852

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #243b74;
/* rgb */ color: rgb(36, 59, 116);
/* oklch */ color: oklch(36.6% 0.102 265.2);

Tailwind

colors: {
  custom: {
    50: '#68709c',
    500: '#243b74',
    950: '#000000',
  },
}

SCSS

$custom: #243b74;
$custom-light: #68709c;
$custom-dark: #000000;

JSON

{
  "hex": "#243b74",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 116
  },
  "hsl": {
    "h": 222.75,
    "s": 52.632,
    "l": 29.804
  },
  "oklch": {
    "l": 0.36649,
    "c": 0.10201,
    "h": 265.2
  },
  "luminance": 0.04764
}

Semantic roles & 50–950 ramp

primary

#243B74

secondary

#A78D4D

accent

#B34CDC

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #243B74

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

Preview Lab → · Contrast checker → · Palette generator →