#233B8F#233B8F

#233B8F is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.8% C 0.142 H 267.2°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#233B8F
RGB	rgb(35, 59, 143)
HSL	hsl(227, 61%, 35%)
HSV	hsv(227, 76%, 56%)
CMYK	cmyk(75.5%, 58.7%, 0%, 43.9%)
CIE-LAB	lab(28.03, 21.92, -49.21)
CIE-LCH	lch(28.03, 53.87, 294.01°)
OKLab	oklab(38.78% -0.0069 -0.1419)
OKLCH	oklch(38.78% 0.142 267.2)
XYZ	xyz(7.2133, 5.4677, 26.6565)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233B8F #8F7723

analogous

#23718F #233B8F #41238F

triadic

#233B8F #8F233B #3B8F23

tetradic

#233B8F #8F2371 #8F7723 #238F41

square

#233B8F #8F2371 #8F7723 #238F41

split-complementary

#233B8F #8F4123 #718F23

monochromatic

#0B122D #17275E #233B8F #2F4FC0 #5773D6

Accessibility & contrast

On white

10.03

#233B8F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#233B8F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233B8F

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233B8F	#FFFFFF	#000000	##FFFFFF
##233B8F	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004792

Deuteranopia (green-blind)

#003D8D

Tritanopia (blue-blind)

#00505F

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #233b8f;
/* rgb */ color: rgb(35, 59, 143);
/* oklch */ color: oklch(38.8% 0.142 267.2);

Tailwind

colors: {
  custom: {
    50: '#6e70b0',
    500: '#233b8f',
    950: '#000000',
  },
}

SCSS

$custom: #233b8f;
$custom-light: #6e70b0;
$custom-dark: #000000;

JSON

{
  "hex": "#233b8f",
  "rgb": {
    "r": 35,
    "g": 59,
    "b": 143
  },
  "hsl": {
    "h": 226.667,
    "s": 60.674,
    "l": 34.902
  },
  "oklch": {
    "l": 0.38776,
    "c": 0.14211,
    "h": 267.2
  },
  "luminance": 0.05468
}

Semantic roles & 50–950 ramp

primary

#233B8F

secondary

#BAA354

accent

#C044E4

background

#F7F6FA

surface

#EDECF5

border

#C8C7CF

text

#080711

muted

#7B7A80

Preview Lab

Preview with #233B8F

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

Preview Lab → · Contrast checker → · Palette generator →