#233C5B#233C5B

#233C5B is a dark, moderate cyan. Relative luminance 0.043; OKLCH L 35.2% C 0.063 H 254.6°. Best body text is #FFFFFF at 11.24:1 contrast (WCAG AA passes).

Color values

HEX	#233C5B
RGB	rgb(35, 60, 91)
HSL	hsl(213, 44%, 25%)
HSV	hsv(213, 62%, 36%)
CMYK	cmyk(61.5%, 34.1%, 0%, 64.3%)
CIE-LAB	lab(24.78, 0.96, -21.45)
CIE-LCH	lch(24.78, 21.47, 272.56°)
OKLab	oklab(35.15% -0.0167 -0.0605)
OKLCH	oklch(35.15% 0.063 254.6)
XYZ	xyz(4.1967, 4.3440, 10.5128)
Luminance	0.0434 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233C5B #5B4223

analogous

#23585B #233C5B #26235B

triadic

#233C5B #5B233C #3C5B23

tetradic

#233C5B #5B2358 #5B4223 #235B26

square

#233C5B #5B2358 #5B4223 #235B26

split-complementary

#233C5B #5B2623 #585B23

monochromatic

#090F16 #121F2F #233C5B #345987 #4576B3

Accessibility & contrast

On white

11.24

#233C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.87

#233C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233C5B

11.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233C5B	#FFFFFF	#000000	##FFFFFF
##233C5B	1.00	11.24	1.87	11.24
#FFFFFF	11.24	1.00	21.00	1.00
#000000	1.87	21.00	1.00	21.00
##FFFFFF	11.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2F3E5C

Deuteranopia (green-blind)

#28385A

Tritanopia (blue-blind)

#004347

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #233c5b;
/* rgb */ color: rgb(35, 60, 91);
/* oklch */ color: oklch(35.2% 0.063 254.6);

Tailwind

colors: {
  custom: {
    50: '#637189',
    500: '#233c5b',
    950: '#000000',
  },
}

SCSS

$custom: #233c5b;
$custom-light: #637189;
$custom-dark: #000000;

JSON

{
  "hex": "#233c5b",
  "rgb": {
    "r": 35,
    "g": 60,
    "b": 91
  },
  "hsl": {
    "h": 213.214,
    "s": 44.444,
    "l": 24.706
  },
  "oklch": {
    "l": 0.35152,
    "c": 0.06273,
    "h": 254.6
  },
  "luminance": 0.04344
}

Semantic roles & 50–950 ramp

primary

#233C5B

secondary

#8F714B

accent

#9B54D4

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05070B

muted

#7A7A7C

Preview Lab

Preview with #233C5B

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

Preview Lab → · Contrast checker → · Palette generator →