#233F8B#233F8B

#233F8B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.3% C 0.131 H 265.5°. Best body text is #FFFFFF at 9.74:1 contrast (WCAG AA passes).

Color values

HEX	#233F8B
RGB	rgb(35, 63, 139)
HSL	hsl(224, 60%, 34%)
HSV	hsv(224, 75%, 55%)
CMYK	cmyk(74.8%, 54.7%, 0%, 45.5%)
CIE-LAB	lab(28.84, 17.59, -45.42)
CIE-LCH	lch(28.84, 48.71, 291.17°)
OKLab	oklab(39.29% -0.0104 -0.1307)
OKLCH	oklch(39.29% 0.131 265.5)
XYZ	xyz(7.1292, 5.7757, 25.1602)
Luminance	0.0578 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F8B #8B6F23

analogous

#23738B #233F8B #3B238B

triadic

#233F8B #8B233F #3F8B23

tetradic

#233F8B #8B2373 #8B6F23 #238B3B

square

#233F8B #8B2373 #8B6F23 #238B3B

split-complementary

#233F8B #8B3B23 #738B23

monochromatic

#0A1329 #17295A #233F8B #2F55BC #5477D4

Accessibility & contrast

On white

9.74

#233F8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.16

#233F8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F8B

9.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F8B	#FFFFFF	#000000	##FFFFFF
##233F8B	1.00	9.74	2.16	9.74
#FFFFFF	9.74	1.00	21.00	1.00
#000000	2.16	21.00	1.00	21.00
##FFFFFF	9.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#07498E

Deuteranopia (green-blind)

#003F89

Tritanopia (blue-blind)

#00515E

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #233f8b;
/* rgb */ color: rgb(35, 63, 139);
/* oklch */ color: oklch(39.3% 0.131 265.5);

Tailwind

colors: {
  custom: {
    50: '#6d73ad',
    500: '#233f8b',
    950: '#000000',
  },
}

SCSS

$custom: #233f8b;
$custom-light: #6d73ad;
$custom-dark: #000000;

JSON

{
  "hex": "#233f8b",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 139
  },
  "hsl": {
    "h": 223.846,
    "s": 59.77,
    "l": 34.118
  },
  "oklch": {
    "l": 0.39288,
    "c": 0.13115,
    "h": 265.5
  },
  "luminance": 0.05776
}

Semantic roles & 50–950 ramp

primary

#233F8B

secondary

#B89C52

accent

#B845E3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080810

muted

#7B7B7F

Preview Lab

Preview with #233F8B

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

Preview Lab → · Contrast checker → · Palette generator →