#233F78#233F78

#233F78 is a dark, moderate blue. Relative luminance 0.053; OKLCH L 37.8% C 0.103 H 262.8°. Best body text is #FFFFFF at 10.23:1 contrast (WCAG AA passes).

Color values

HEX	#233F78
RGB	rgb(35, 63, 120)
HSL	hsl(220, 55%, 30%)
HSV	hsv(220, 71%, 47%)
CMYK	cmyk(70.8%, 47.5%, 0%, 52.9%)
CIE-LAB	lab(27.48, 10.09, -35.75)
CIE-LCH	lch(27.48, 37.14, 285.76°)
OKLab	oklab(37.82% -0.013 -0.1023)
OKLCH	oklch(37.82% 0.103 262.8)
XYZ	xyz(5.8596, 5.2678, 18.4736)
Luminance	0.0527 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F78 #785C23

analogous

#236A78 #233F78 #312378

triadic

#233F78 #78233F #3F7823

tetradic

#233F78 #78236A #785C23 #237831

square

#233F78 #78236A #785C23 #237831

split-complementary

#233F78 #783123 #6A7823

monochromatic

#070D19 #152649 #233F78 #3158A7 #4B75CA

Accessibility & contrast

On white

10.23

#233F78 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#233F78 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F78

10.23:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F78	#FFFFFF	#000000	##FFFFFF
##233F78	1.00	10.23	2.05	10.23
#FFFFFF	10.23	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.23	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23457A

Deuteranopia (green-blind)

#123D77

Tritanopia (blue-blind)

#004C55

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #233f78;
/* rgb */ color: rgb(35, 63, 120);
/* oklch */ color: oklch(37.8% 0.103 262.8);

Tailwind

colors: {
  custom: {
    50: '#69739f',
    500: '#233f78',
    950: '#000000',
  },
}

SCSS

$custom: #233f78;
$custom-light: #69739f;
$custom-dark: #000000;

JSON

{
  "hex": "#233f78",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 120
  },
  "hsl": {
    "h": 220.235,
    "s": 54.839,
    "l": 30.392
  },
  "oklch": {
    "l": 0.37823,
    "c": 0.1031,
    "h": 262.8
  },
  "luminance": 0.05268
}

Semantic roles & 50–950 ramp

primary

#233F78

secondary

#AB8C4C

accent

#AD4ADE

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#07080E

muted

#7A7B7E

Preview Lab

Preview with #233F78

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

Preview Lab → · Contrast checker → · Palette generator →