#233D5B#233D5B

#233D5B is a dark, moderate cyan. Relative luminance 0.044; OKLCH L 35.4% C 0.062 H 253.0°. Best body text is #FFFFFF at 11.11:1 contrast (WCAG AA passes).

Color values

HEX	#233D5B
RGB	rgb(35, 61, 91)
HSL	hsl(212, 44%, 25%)
HSV	hsv(212, 62%, 36%)
CMYK	cmyk(61.5%, 33%, 0%, 64.3%)
CIE-LAB	lab(25.11, 0.28, -20.93)
CIE-LCH	lch(25.11, 20.93, 270.77°)
OKLab	oklab(35.41% -0.018 -0.059)
OKLCH	oklch(35.41% 0.062 253)
XYZ	xyz(4.2495, 4.4498, 10.5305)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233D5B #5B4123

analogous

#23595B #233D5B #25235B

triadic

#233D5B #5B233D #3D5B23

tetradic

#233D5B #5B2359 #5B4123 #235B25

square

#233D5B #5B2359 #5B4123 #235B25

split-complementary

#233D5B #5B2523 #595B23

monochromatic

#090F16 #121F2F #233D5B #345B87 #4578B3

Accessibility & contrast

On white

11.11

#233D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#233D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233D5B

11.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233D5B	#FFFFFF	#000000	##FFFFFF
##233D5B	1.00	11.11	1.89	11.11
#FFFFFF	11.11	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#313F5C

Deuteranopia (green-blind)

#29395A

Tritanopia (blue-blind)

#004448

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #233d5b;
/* rgb */ color: rgb(35, 61, 91);
/* oklch */ color: oklch(35.4% 0.062 253.0);

Tailwind

colors: {
  custom: {
    50: '#637289',
    500: '#233d5b',
    950: '#000000',
  },
}

SCSS

$custom: #233d5b;
$custom-light: #637289;
$custom-dark: #000000;

JSON

{
  "hex": "#233d5b",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 91
  },
  "hsl": {
    "h": 212.143,
    "s": 44.444,
    "l": 24.706
  },
  "oklch": {
    "l": 0.35409,
    "c": 0.06165,
    "h": 253
  },
  "luminance": 0.0445
}

Semantic roles & 50–950 ramp

primary

#233D5B

secondary

#8F6F4B

accent

#9854D4

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05070B

muted

#7A7A7C

Preview Lab

Preview with #233D5B

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

Preview Lab → · Contrast checker → · Palette generator →