#243B70#243B70

#243B70 is a dark, moderate blue. Relative luminance 0.047; OKLCH L 36.4% C 0.096 H 264.5°. Best body text is #FFFFFF at 10.85:1 contrast (WCAG AA passes).

Color values

HEX	#243B70
RGB	rgb(36, 59, 112)
HSL	hsl(222, 51%, 29%)
HSV	hsv(222, 68%, 44%)
CMYK	cmyk(67.9%, 47.3%, 0%, 56.1%)
CIE-LAB	lab(25.78, 9.91, -33.40)
CIE-LCH	lch(25.78, 34.84, 286.52°)
OKLab	oklab(36.36% -0.0092 -0.0954)
OKLCH	oklch(36.36% 0.096 264.5)
XYZ	xyz(5.2151, 4.6724, 15.9531)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#243B70 #705924

analogous

#246170 #243B70 #332470

triadic

#243B70 #70243B #3B7024

tetradic

#243B70 #702461 #705924 #247033

square

#243B70 #702461 #705924 #247033

split-complementary

#243B70 #703324 #617024

monochromatic

#070C17 #152342 #243B70 #33539E #4A6FC5

Accessibility & contrast

On white

10.85

#243B70 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#243B70 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #243B70

10.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##243B70	#FFFFFF	#000000	##FFFFFF
##243B70	1.00	10.85	1.93	10.85
#FFFFFF	10.85	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214172

Deuteranopia (green-blind)

#143A6F

Tritanopia (blue-blind)

#004750

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #243b70;
/* rgb */ color: rgb(36, 59, 112);
/* oklch */ color: oklch(36.4% 0.096 264.5);

Tailwind

colors: {
  custom: {
    50: '#687099',
    500: '#243b70',
    950: '#000000',
  },
}

SCSS

$custom: #243b70;
$custom-light: #687099;
$custom-dark: #000000;

JSON

{
  "hex": "#243b70",
  "rgb": {
    "r": 36,
    "g": 59,
    "b": 112
  },
  "hsl": {
    "h": 221.842,
    "s": 51.351,
    "l": 29.02
  },
  "oklch": {
    "l": 0.36356,
    "c": 0.09587,
    "h": 264.5
  },
  "luminance": 0.04673
}

Semantic roles & 50–950 ramp

primary

#243B70

secondary

#A3894D

accent

#B04DDB

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07070E

muted

#7A7A7E

Preview Lab

Preview with #243B70

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

Preview Lab → · Contrast checker → · Palette generator →