#233F9C#233F9C

#233F9C is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.7% C 0.155 H 266.5°. Best body text is #FFFFFF at 9.28:1 contrast (WCAG AA passes).

Color values

HEX	#233F9C
RGB	rgb(35, 63, 156)
HSL	hsl(226, 63%, 37%)
HSV	hsv(226, 78%, 61%)
CMYK	cmyk(77.6%, 59.6%, 0%, 38.8%)
CIE-LAB	lab(30.19, 24.25, -53.64)
CIE-LCH	lch(30.19, 58.87, 294.33°)
OKLab	oklab(40.72% -0.0094 -0.1549)
OKLCH	oklch(40.72% 0.155 266.5)
XYZ	xyz(8.4693, 6.3117, 32.2180)
Luminance	0.0631 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F9C #9C8023

analogous

#237B9C #233F9C #44239C

triadic

#233F9C #9C233F #3F9C23

tetradic

#233F9C #9C237B #9C8023 #239C44

square

#233F9C #9C237B #9C8023 #239C44

split-complementary

#233F9C #9C4423 #7B9C23

monochromatic

#0D1738 #182B6A #233F9C #2E53CE #5E7BDB

Accessibility & contrast

On white

9.28

#233F9C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#233F9C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F9C

9.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F9C	#FFFFFF	#000000	##FFFFFF
##233F9C	1.00	9.28	2.26	9.28
#FFFFFF	9.28	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004D9F

Deuteranopia (green-blind)

#00429A

Tritanopia (blue-blind)

#005667

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #233f9c;
/* rgb */ color: rgb(35, 63, 156);
/* oklch */ color: oklch(40.7% 0.155 266.5);

Tailwind

colors: {
  custom: {
    50: '#7173ba',
    500: '#233f9c',
    950: '#000000',
  },
}

SCSS

$custom: #233f9c;
$custom-light: #7173ba;
$custom-dark: #000000;

JSON

{
  "hex": "#233f9c",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 156
  },
  "hsl": {
    "h": 226.116,
    "s": 63.351,
    "l": 37.451
  },
  "oklch": {
    "l": 0.40724,
    "c": 0.15519,
    "h": 266.5
  },
  "luminance": 0.06313
}

Semantic roles & 50–950 ramp

primary

#233F9C

secondary

#C0A85B

accent

#C041E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090812

muted

#7B7B81

Preview Lab

Preview with #233F9C

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

Preview Lab → · Contrast checker → · Palette generator →