#233D8F#233D8F

#233D8F is a dark, vivid blue. Relative luminance 0.057; OKLCH L 39.2% C 0.140 H 266.5°. Best body text is #FFFFFF at 9.83:1 contrast (WCAG AA passes).

Color values

HEX	#233D8F
RGB	rgb(35, 61, 143)
HSL	hsl(226, 61%, 35%)
HSV	hsv(226, 76%, 56%)
CMYK	cmyk(75.5%, 57.3%, 0%, 43.9%)
CIE-LAB	lab(28.58, 20.54, -48.30)
CIE-LCH	lch(28.58, 52.49, 293.04°)
OKLab	oklab(39.19% -0.0084 -0.1393)
OKLCH	oklch(39.19% 0.14 266.5)
XYZ	xyz(7.3181, 5.6772, 26.6914)
Luminance	0.0568 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233D8F #8F7523

analogous

#23738F #233D8F #3F238F

triadic

#233D8F #8F233D #3D8F23

tetradic

#233D8F #8F2373 #8F7523 #238F3F

square

#233D8F #8F2373 #8F7523 #238F3F

split-complementary

#233D8F #8F3F23 #738F23

monochromatic

#0B132D #17285E #233D8F #2F52C0 #5775D6

Accessibility & contrast

On white

9.83

#233D8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#233D8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233D8F

9.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233D8F	#FFFFFF	#000000	##FFFFFF
##233D8F	1.00	9.83	2.14	9.83
#FFFFFF	9.83	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004992

Deuteranopia (green-blind)

#003F8D

Tritanopia (blue-blind)

#005160

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #233d8f;
/* rgb */ color: rgb(35, 61, 143);
/* oklch */ color: oklch(39.2% 0.140 266.5);

Tailwind

colors: {
  custom: {
    50: '#6e72b0',
    500: '#233d8f',
    950: '#000000',
  },
}

SCSS

$custom: #233d8f;
$custom-light: #6e72b0;
$custom-dark: #000000;

JSON

{
  "hex": "#233d8f",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 143
  },
  "hsl": {
    "h": 225.556,
    "s": 60.674,
    "l": 34.902
  },
  "oklch": {
    "l": 0.39193,
    "c": 0.13952,
    "h": 266.5
  },
  "luminance": 0.05678
}

Semantic roles & 50–950 ramp

primary

#233D8F

secondary

#BAA154

accent

#BD44E4

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #233D8F

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

Preview Lab → · Contrast checker → · Palette generator →