#233A8B#233A8B

#233A8B is a dark, vivid blue. Relative luminance 0.052; OKLCH L 38.2% C 0.138 H 267.4°. Best body text is #FFFFFF at 10.25:1 contrast (WCAG AA passes).

Color values

HEX	#233A8B
RGB	rgb(35, 58, 139)
HSL	hsl(227, 60%, 34%)
HSV	hsv(227, 75%, 55%)
CMYK	cmyk(74.8%, 58.3%, 0%, 45.5%)
CIE-LAB	lab(27.43, 21.04, -47.71)
CIE-LCH	lch(27.43, 52.15, 293.80°)
OKLab	oklab(38.22% -0.0062 -0.1376)
OKLCH	oklch(38.22% 0.138 267.4)
XYZ	xyz(6.8648, 5.2468, 25.0720)
Luminance	0.0525 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233A8B #8B7423

analogous

#236E8B #233A8B #40238B

triadic

#233A8B #8B233A #3A8B23

tetradic

#233A8B #8B236E #8B7423 #238B40

square

#233A8B #8B236E #8B7423 #238B40

split-complementary

#233A8B #8B4023 #6E8B23

monochromatic

#0A1129 #17265A #233A8B #2F4EBC #5471D4

Accessibility & contrast

On white

10.25

#233A8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.05

#233A8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233A8B

10.25:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233A8B	#FFFFFF	#000000	##FFFFFF
##233A8B	1.00	10.25	2.05	10.25
#FFFFFF	10.25	1.00	21.00	1.00
#000000	2.05	21.00	1.00	21.00
##FFFFFF	10.25	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00468E

Deuteranopia (green-blind)

#003C89

Tritanopia (blue-blind)

#004E5C

Achromatopsia (no color)

#414141

Design tokens & code

CSS

--color: #233a8b;
/* rgb */ color: rgb(35, 58, 139);
/* oklch */ color: oklch(38.2% 0.138 267.4);

Tailwind

colors: {
  custom: {
    50: '#6d6fae',
    500: '#233a8b',
    950: '#000000',
  },
}

SCSS

$custom: #233a8b;
$custom-light: #6d6fae;
$custom-dark: #000000;

JSON

{
  "hex": "#233a8b",
  "rgb": {
    "r": 35,
    "g": 58,
    "b": 139
  },
  "hsl": {
    "h": 226.731,
    "s": 59.77,
    "l": 34.118
  },
  "oklch": {
    "l": 0.38224,
    "c": 0.13771,
    "h": 267.4
  },
  "luminance": 0.05248
}

Semantic roles & 50–950 ramp

primary

#233A8B

secondary

#B8A152

accent

#C045E3

background

#F7F6FA

surface

#EDECF4

border

#C8C7CE

text

#080710

muted

#7B7A7F

Preview Lab

Preview with #233A8B

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

Preview Lab → · Contrast checker → · Palette generator →