#233B63#233B63

#233B63 is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.4% C 0.076 H 260.1°. Best body text is #FFFFFF at 11.19:1 contrast (WCAG AA passes).

Color values

HEX	#233B63
RGB	rgb(35, 59, 99)
HSL	hsl(218, 48%, 26%)
HSV	hsv(218, 65%, 39%)
CMYK	cmyk(64.6%, 40.4%, 0%, 61.2%)
CIE-LAB	lab(24.91, 4.67, -26.44)
CIE-LCH	lch(24.91, 26.85, 280.01°)
OKLab	oklab(35.4% -0.0131 -0.075)
OKLCH	oklch(35.4% 0.076 260.1)
XYZ	xyz(4.5084, 4.3857, 12.4109)
Luminance	0.0439 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233B63 #634B23

analogous

#235B63 #233B63 #2B2363

triadic

#233B63 #63233B #3B6323

tetradic

#233B63 #63235B #634B23 #23632B

square

#233B63 #63235B #634B23 #23632B

split-complementary

#233B63 #632B23 #5B6323

monochromatic

#080D17 #132036 #233B63 #335690 #4471BD

Accessibility & contrast

On white

11.19

#233B63 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#233B63 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233B63

11.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233B63	#FFFFFF	#000000	##FFFFFF
##233B63	1.00	11.19	1.88	11.19
#FFFFFF	11.19	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A3E65

Deuteranopia (green-blind)

#213862

Tritanopia (blue-blind)

#00444A

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #233b63;
/* rgb */ color: rgb(35, 59, 99);
/* oklch */ color: oklch(35.4% 0.076 260.1);

Tailwind

colors: {
  custom: {
    50: '#64708f',
    500: '#233b63',
    950: '#000000',
  },
}

SCSS

$custom: #233b63;
$custom-light: #64708f;
$custom-dark: #000000;

JSON

{
  "hex": "#233b63",
  "rgb": {
    "r": 35,
    "g": 59,
    "b": 99
  },
  "hsl": {
    "h": 217.5,
    "s": 47.761,
    "l": 26.275
  },
  "oklch": {
    "l": 0.35402,
    "c": 0.07618,
    "h": 260.1
  },
  "luminance": 0.04386
}

Semantic roles & 50–950 ramp

primary

#233B63

secondary

#977A4B

accent

#A550D7

background

#F6F6F8

surface

#EBECF0

border

#C6C7CB

text

#06070C

muted

#7A7A7D

Preview Lab

Preview with #233B63

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

Preview Lab → · Contrast checker → · Palette generator →