#233C8B#233C8B

#233C8B is a dark, vivid blue. Relative luminance 0.055; OKLCH L 38.6% C 0.135 H 266.7°. Best body text is #FFFFFF at 10.04:1 contrast (WCAG AA passes).

Color values

HEX	#233C8B
RGB	rgb(35, 60, 139)
HSL	hsl(226, 60%, 34%)
HSV	hsv(226, 75%, 55%)
CMYK	cmyk(74.8%, 56.8%, 0%, 45.5%)
CIE-LAB	lab(27.99, 19.66, -46.80)
CIE-LCH	lch(27.99, 50.76, 292.79°)
OKLab	oklab(38.65% -0.0079 -0.1349)
OKLCH	oklch(38.65% 0.135 266.7)
XYZ	xyz(6.9676, 5.4524, 25.1063)
Luminance	0.0545 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233C8B #8B7223

analogous

#23708B #233C8B #3E238B

triadic

#233C8B #8B233C #3C8B23

tetradic

#233C8B #8B2370 #8B7223 #238B3E

square

#233C8B #8B2370 #8B7223 #238B3E

split-complementary

#233C8B #8B3E23 #708B23

monochromatic

#0A1229 #17275A #233C8B #2F51BC #5473D4

Accessibility & contrast

On white

10.04

#233C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#233C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233C8B

10.04:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233C8B	#FFFFFF	#000000	##FFFFFF
##233C8B	1.00	10.04	2.09	10.04
#FFFFFF	10.04	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.04	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00478E

Deuteranopia (green-blind)

#003D89

Tritanopia (blue-blind)

#004F5D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #233c8b;
/* rgb */ color: rgb(35, 60, 139);
/* oklch */ color: oklch(38.6% 0.135 266.7);

Tailwind

colors: {
  custom: {
    50: '#6d71ad',
    500: '#233c8b',
    950: '#000000',
  },
}

SCSS

$custom: #233c8b;
$custom-light: #6d71ad;
$custom-dark: #000000;

JSON

{
  "hex": "#233c8b",
  "rgb": {
    "r": 35,
    "g": 60,
    "b": 139
  },
  "hsl": {
    "h": 225.577,
    "s": 59.77,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38645,
    "c": 0.13509,
    "h": 266.7
  },
  "luminance": 0.05453
}

Semantic roles & 50–950 ramp

primary

#233C8B

secondary

#B89F52

accent

#BD45E3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #233C8B

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

Preview Lab → · Contrast checker → · Palette generator →