#233A9B#233A9B

#233A9B is a dark, vivid blue. Relative luminance 0.058; OKLCH L 39.6% C 0.160 H 267.9°. Best body text is #FFFFFF at 9.77:1 contrast (WCAG AA passes).

Color values

HEX	#233A9B
RGB	rgb(35, 58, 155)
HSL	hsl(229, 63%, 37%)
HSV	hsv(229, 77%, 61%)
CMYK	cmyk(77.4%, 62.6%, 0%, 39.2%)
CIE-LAB	lab(28.77, 27.24, -55.34)
CIE-LCH	lch(28.77, 61.69, 296.21°)
OKLab	oklab(39.65% -0.006 -0.16)
OKLCH	oklch(39.65% 0.16 267.9)
XYZ	xyz(8.1205, 5.7491, 31.6857)
Luminance	0.0575 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233A9B #9B8423

analogous

#23769B #233A9B #48239B

triadic

#233A9B #9B233A #3A9B23

tetradic

#233A9B #9B2376 #9B8423 #239B48

square

#233A9B #9B2376 #9B8423 #239B48

split-complementary

#233A9B #9B4823 #769B23

monochromatic

#0C1537 #182769 #233A9B #2E4DCD #5E76DB

Accessibility & contrast

On white

9.77

#233A9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.15

#233A9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233A9B

9.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233A9B	#FFFFFF	#000000	##FFFFFF
##233A9B	1.00	9.77	2.15	9.77
#FFFFFF	9.77	1.00	21.00	1.00
#000000	2.15	21.00	1.00	21.00
##FFFFFF	9.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#003E99

Tritanopia (blue-blind)

#005365

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #233a9b;
/* rgb */ color: rgb(35, 58, 155);
/* oklch */ color: oklch(39.6% 0.160 267.9);

Tailwind

colors: {
  custom: {
    50: '#7170b9',
    500: '#233a9b',
    950: '#000000',
  },
}

SCSS

$custom: #233a9b;
$custom-light: #7170b9;
$custom-dark: #000000;

JSON

{
  "hex": "#233a9b",
  "rgb": {
    "r": 35,
    "g": 58,
    "b": 155
  },
  "hsl": {
    "h": 228.5,
    "s": 63.158,
    "l": 37.255
  },
  "oklch": {
    "l": 0.39645,
    "c": 0.16008,
    "h": 267.9
  },
  "luminance": 0.0575
}

Semantic roles & 50–950 ramp

primary

#233A9B

secondary

#BFAC5A

accent

#C742E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #233A9B

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

Preview Lab → · Contrast checker → · Palette generator →