#233A5B#233A5B

#233A5B is a dark, moderate blue. Relative luminance 0.041; OKLCH L 34.6% C 0.065 H 257.4°. Best body text is #FFFFFF at 11.49:1 contrast (WCAG AA passes).

Color values

HEX	#233A5B
RGB	rgb(35, 58, 91)
HSL	hsl(215, 44%, 25%)
HSV	hsv(215, 62%, 36%)
CMYK	cmyk(61.5%, 36.3%, 0%, 64.3%)
CIE-LAB	lab(24.12, 2.32, -22.47)
CIE-LCH	lch(24.12, 22.59, 275.90°)
OKLab	oklab(34.64% -0.0141 -0.0635)
OKLCH	oklch(34.64% 0.065 257.4)
XYZ	xyz(4.0939, 4.1384, 10.4786)
Luminance	0.0414 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233A5B #5B4423

analogous

#23565B #233A5B #28235B

triadic

#233A5B #5B233A #3A5B23

tetradic

#233A5B #5B2356 #5B4423 #235B28

square

#233A5B #5B2356 #5B4423 #235B28

split-complementary

#233A5B #5B2823 #565B23

monochromatic

#090E16 #121E2F #233A5B #345687 #4572B3

Accessibility & contrast

On white

11.49

#233A5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.83

#233A5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233A5B

11.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233A5B	#FFFFFF	#000000	##FFFFFF
##233A5B	1.00	11.49	1.83	11.49
#FFFFFF	11.49	1.00	21.00	1.00
#000000	1.83	21.00	1.00	21.00
##FFFFFF	11.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C3C5C

Deuteranopia (green-blind)

#25375A

Tritanopia (blue-blind)

#004146

Achromatopsia (no color)

#393939

Design tokens & code

CSS

--color: #233a5b;
/* rgb */ color: rgb(35, 58, 91);
/* oklch */ color: oklch(34.6% 0.065 257.4);

Tailwind

colors: {
  custom: {
    50: '#636f89',
    500: '#233a5b',
    950: '#000000',
  },
}

SCSS

$custom: #233a5b;
$custom-light: #636f89;
$custom-dark: #000000;

JSON

{
  "hex": "#233a5b",
  "rgb": {
    "r": 35,
    "g": 58,
    "b": 91
  },
  "hsl": {
    "h": 215.357,
    "s": 44.444,
    "l": 24.706
  },
  "oklch": {
    "l": 0.34641,
    "c": 0.06502,
    "h": 257.4
  },
  "luminance": 0.04139
}

Semantic roles & 50–950 ramp

primary

#233A5B

secondary

#8F734B

accent

#9F54D4

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#05070B

muted

#7A7A7C

Preview Lab

Preview with #233A5B

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

Preview Lab → · Contrast checker → · Palette generator →