#233D9B#233D9B

#233D9B is a dark, vivid blue. Relative luminance 0.061; OKLCH L 40.2% C 0.156 H 267.1°. Best body text is #FFFFFF at 9.49:1 contrast (WCAG AA passes).

Color values

HEX	#233D9B
RGB	rgb(35, 61, 155)
HSL	hsl(227, 63%, 37%)
HSV	hsv(227, 77%, 61%)
CMYK	cmyk(77.4%, 60.6%, 0%, 39.2%)
CIE-LAB	lab(29.56, 25.22, -54.05)
CIE-LCH	lch(29.56, 59.64, 295.01°)
OKLab	oklab(40.24% -0.008 -0.1561)
OKLCH	oklch(40.24% 0.156 267.1)
XYZ	xyz(8.2762, 6.0604, 31.7376)
Luminance	0.0606 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233D9B #9B8123

analogous

#23799B #233D9B #45239B

triadic

#233D9B #9B233D #3D9B23

tetradic

#233D9B #9B2379 #9B8123 #239B45

square

#233D9B #9B2379 #9B8123 #239B45

split-complementary

#233D9B #9B4523 #799B23

monochromatic

#0C1637 #182969 #233D9B #2E51CD #5E79DB

Accessibility & contrast

On white

9.49

#233D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.21

#233D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233D9B

9.49:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233D9B	#FFFFFF	#000000	##FFFFFF
##233D9B	1.00	9.49	2.21	9.49
#FFFFFF	9.49	1.00	21.00	1.00
#000000	2.21	21.00	1.00	21.00
##FFFFFF	9.49	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005566

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #233d9b;
/* rgb */ color: rgb(35, 61, 155);
/* oklch */ color: oklch(40.2% 0.156 267.1);

Tailwind

colors: {
  custom: {
    50: '#7172b9',
    500: '#233d9b',
    950: '#000000',
  },
}

SCSS

$custom: #233d9b;
$custom-light: #7172b9;
$custom-dark: #000000;

JSON

{
  "hex": "#233d9b",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 155
  },
  "hsl": {
    "h": 227,
    "s": 63.158,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40235,
    "c": 0.15634,
    "h": 267.1
  },
  "luminance": 0.06061
}

Semantic roles & 50–950 ramp

primary

#233D9B

secondary

#BFA95A

accent

#C342E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #233D9B

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

Preview Lab → · Contrast checker → · Palette generator →