#233C9B#233C9B

#233C9B is a dark, vivid blue. Relative luminance 0.060; OKLCH L 40.0% C 0.158 H 267.3°. Best body text is #FFFFFF at 9.58:1 contrast (WCAG AA passes).

Color values

HEX	#233C9B
RGB	rgb(35, 60, 155)
HSL	hsl(228, 63%, 37%)
HSV	hsv(228, 77%, 61%)
CMYK	cmyk(77.4%, 61.3%, 0%, 39.2%)
CIE-LAB	lab(29.30, 25.89, -54.48)
CIE-LCH	lch(29.30, 60.32, 295.42°)
OKLab	oklab(40.04% -0.0073 -0.1574)
OKLCH	oklch(40.04% 0.158 267.3)
XYZ	xyz(8.2233, 5.9547, 31.7200)
Luminance	0.0596 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233C9B #9B8223

analogous

#23789B #233C9B #46239B

triadic

#233C9B #9B233C #3C9B23

tetradic

#233C9B #9B2378 #9B8223 #239B46

square

#233C9B #9B2378 #9B8223 #239B46

split-complementary

#233C9B #9B4623 #789B23

monochromatic

#0C1537 #182969 #233C9B #2E4FCD #5E78DB

Accessibility & contrast

On white

9.58

#233C9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.19

#233C9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233C9B

9.58:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233C9B	#FFFFFF	#000000	##FFFFFF
##233C9B	1.00	9.58	2.19	9.58
#FFFFFF	9.58	1.00	21.00	1.00
#000000	2.19	21.00	1.00	21.00
##FFFFFF	9.58	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004B9E

Deuteranopia (green-blind)

#004099

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#454545

Design tokens & code

CSS

--color: #233c9b;
/* rgb */ color: rgb(35, 60, 155);
/* oklch */ color: oklch(40.0% 0.158 267.3);

Tailwind

colors: {
  custom: {
    50: '#7171b9',
    500: '#233c9b',
    950: '#000000',
  },
}

SCSS

$custom: #233c9b;
$custom-light: #7171b9;
$custom-dark: #000000;

JSON

{
  "hex": "#233c9b",
  "rgb": {
    "r": 35,
    "g": 60,
    "b": 155
  },
  "hsl": {
    "h": 227.5,
    "s": 63.158,
    "l": 37.255
  },
  "oklch": {
    "l": 0.40036,
    "c": 0.15759,
    "h": 267.3
  },
  "luminance": 0.05956
}

Semantic roles & 50–950 ramp

primary

#233C9B

secondary

#BFAA5A

accent

#C442E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #233C9B

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

Preview Lab → · Contrast checker → · Palette generator →