#233B51#233B51

#233B51 is a dark, muted cyan. Relative luminance 0.041; OKLCH L 34.3% C 0.049 H 247.4°. Best body text is #FFFFFF at 11.57:1 contrast (WCAG AA passes).

Color values

HEX	#233B51
RGB	rgb(35, 59, 81)
HSL	hsl(209, 40%, 23%)
HSV	hsv(209, 57%, 32%)
CMYK	cmyk(56.8%, 27.2%, 0%, 68.2%)
CIE-LAB	lab(23.93, -2.02, -16.20)
CIE-LCH	lch(23.93, 16.33, 262.88°)
OKLab	oklab(34.32% -0.0189 -0.0453)
OKLCH	oklch(34.32% 0.049 247.4)
XYZ	xyz(3.7418, 4.0790, 8.3731)
Luminance	0.0408 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233B51 #513923

analogous

#235150 #233B51 #232451

triadic

#233B51 #51233B #3B5123

tetradic

#233B51 #502351 #513923 #245123

square

#233B51 #502351 #513923 #245123

split-complementary

#233B51 #512324 #515023

monochromatic

#091015 #111C26 #233B51 #355A7C #4879A6

Accessibility & contrast

On white

11.57

#233B51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.82

#233B51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233B51

11.57:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233B51	#FFFFFF	#000000	##FFFFFF
##233B51	1.00	11.57	1.82	11.57
#FFFFFF	11.57	1.00	21.00	1.00
#000000	1.82	21.00	1.00	21.00
##FFFFFF	11.57	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#323C52

Deuteranopia (green-blind)

#2C3751

Tritanopia (blue-blind)

#0A4043

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #233b51;
/* rgb */ color: rgb(35, 59, 81);
/* oklch */ color: oklch(34.3% 0.049 247.4);

Tailwind

colors: {
  custom: {
    50: '#617082',
    500: '#233b51',
    950: '#000000',
  },
}

SCSS

$custom: #233b51;
$custom-light: #617082;
$custom-dark: #000000;

JSON

{
  "hex": "#233b51",
  "rgb": {
    "r": 35,
    "g": 59,
    "b": 81
  },
  "hsl": {
    "h": 208.696,
    "s": 39.655,
    "l": 22.745
  },
  "oklch": {
    "l": 0.34318,
    "c": 0.04909,
    "h": 247.4
  },
  "luminance": 0.04079
}

Semantic roles & 50–950 ramp

primary

#233B51

secondary

#85674B

accent

#9158D0

background

#F5F6F7

surface

#EAECEE

border

#C6C7C9

text

#05070A

muted

#797A7C

Preview Lab

Preview with #233B51

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

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