#233D99#233D99

#233D99 is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.1% C 0.154 H 267.0°. Best body text is #FFFFFF at 9.55:1 contrast (WCAG AA passes).

Color values

HEX	#233D99
RGB	rgb(35, 61, 153)
HSL	hsl(227, 63%, 37%)
HSV	hsv(227, 77%, 60%)
CMYK	cmyk(77.1%, 60.1%, 0%, 40%)
CIE-LAB	lab(29.40, 24.44, -53.10)
CIE-LCH	lch(29.40, 58.46, 294.72°)
OKLab	oklab(40.06% -0.008 -0.1534)
OKLCH	oklch(40.06% 0.154 267)
XYZ	xyz(8.1096, 5.9938, 30.8603)
Luminance	0.0600 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233D99 #997F23

analogous

#237899 #233D99 #442399

triadic

#233D99 #99233D #3D9923

tetradic

#233D99 #992378 #997F23 #239944

square

#233D99 #992378 #997F23 #239944

split-complementary

#233D99 #994423 #789923

monochromatic

#0C1535 #182967 #233D99 #2E51CB #5D78DA

Accessibility & contrast

On white

9.55

#233D99 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.20

#233D99 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233D99

9.55:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233D99	#FFFFFF	#000000	##FFFFFF
##233D99	1.00	9.55	2.20	9.55
#FFFFFF	9.55	1.00	21.00	1.00
#000000	2.20	21.00	1.00	21.00
##FFFFFF	9.55	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9C

Deuteranopia (green-blind)

#004097

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #233d99;
/* rgb */ color: rgb(35, 61, 153);
/* oklch */ color: oklch(40.1% 0.154 267.0);

Tailwind

colors: {
  custom: {
    50: '#7172b8',
    500: '#233d99',
    950: '#000000',
  },
}

SCSS

$custom: #233d99;
$custom-light: #7172b8;
$custom-dark: #000000;

JSON

{
  "hex": "#233d99",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 153
  },
  "hsl": {
    "h": 226.78,
    "s": 62.766,
    "l": 36.863
  },
  "oklch": {
    "l": 0.40058,
    "c": 0.15357,
    "h": 267
  },
  "luminance": 0.05995
}

Semantic roles & 50–950 ramp

primary

#233D99

secondary

#BEA859

accent

#C242E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090711

muted

#7B7A80

Preview Lab

Preview with #233D99

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

Preview Lab → · Contrast checker → · Palette generator →