#233F5B#233F5B

#233F5B is a dark, muted cyan. Relative luminance 0.047; OKLCH L 35.9% C 0.060 H 249.8°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#233F5B
RGB	rgb(35, 63, 91)
HSL	hsl(210, 44%, 25%)
HSV	hsv(210, 62%, 36%)
CMYK	cmyk(61.5%, 30.8%, 0%, 64.3%)
CIE-LAB	lab(25.77, -1.06, -19.90)
CIE-LCH	lch(25.77, 19.93, 266.95°)
OKLab	oklab(35.93% -0.0206 -0.056)
OKLCH	oklch(35.93% 0.06 249.8)
XYZ	xyz(4.3583, 4.6673, 10.5667)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F5B #5B3F23

analogous

#235B5B #233F5B #23235B

triadic

#233F5B #5B233F #3F5B23

tetradic

#233F5B #5B235B #5B3F23 #235B23

square

#233F5B #5B235B #5B3F23 #235B23

split-complementary

#233F5B #5B2323 #5B5B23

monochromatic

#090F16 #12202F #233F5B #345E87 #457CB3

Accessibility & contrast

On white

10.86

#233F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#233F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F5B

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F5B	#FFFFFF	#000000	##FFFFFF
##233F5B	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#33405C

Deuteranopia (green-blind)

#2C3B5A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #233f5b;
/* rgb */ color: rgb(35, 63, 91);
/* oklch */ color: oklch(35.9% 0.060 249.8);

Tailwind

colors: {
  custom: {
    50: '#637389',
    500: '#233f5b',
    950: '#000000',
  },
}

SCSS

$custom: #233f5b;
$custom-light: #637389;
$custom-dark: #000000;

JSON

{
  "hex": "#233f5b",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 91
  },
  "hsl": {
    "h": 210,
    "s": 44.444,
    "l": 24.706
  },
  "oklch": {
    "l": 0.35927,
    "c": 0.05962,
    "h": 249.8
  },
  "luminance": 0.04668
}

Semantic roles & 50–950 ramp

primary

#233F5B

secondary

#8F6D4B

accent

#9454D4

background

#F6F7F8

surface

#EBEDF0

border

#C6C8CB

text

#05080B

muted

#7A7B7C

Preview Lab

Preview with #233F5B

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

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