#233DA1#233DA1

#233DA1 is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.8% C 0.165 H 267.2°. Best body text is #FFFFFF at 9.32:1 contrast (WCAG AA passes).

Color values

HEX	#233DA1
RGB	rgb(35, 61, 161)
HSL	hsl(228, 64%, 38%)
HSV	hsv(228, 78%, 63%)
CMYK	cmyk(78.3%, 62.1%, 0%, 36.9%)
CIE-LAB	lab(30.08, 27.53, -56.85)
CIE-LCH	lch(30.08, 63.16, 295.84°)
OKLab	oklab(40.78% -0.008 -0.1643)
OKLCH	oklch(40.78% 0.165 267.2)
XYZ	xyz(8.7927, 6.2670, 34.4576)
Luminance	0.0627 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233DA1 #A18723

analogous

#237CA1 #233DA1 #4823A1

triadic

#233DA1 #A1233D #3DA123

tetradic

#233DA1 #A1237C #A18723 #23A148

square

#233DA1 #A1237C #A18723 #23A148

split-complementary

#233DA1 #A14823 #7CA123

monochromatic

#0D173C #182A6F #233DA1 #2F51D2 #627BDD

Accessibility & contrast

On white

9.32

#233DA1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#233DA1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233DA1

9.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233DA1	#FFFFFF	#000000	##FFFFFF
##233DA1	1.00	9.32	2.25	9.32
#FFFFFF	9.32	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004DA4

Deuteranopia (green-blind)

#00419F

Tritanopia (blue-blind)

#005769

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #233da1;
/* rgb */ color: rgb(35, 61, 161);
/* oklch */ color: oklch(40.8% 0.165 267.2);

Tailwind

colors: {
  custom: {
    50: '#7372be',
    500: '#233da1',
    950: '#000000',
  },
}

SCSS

$custom: #233da1;
$custom-light: #7372be;
$custom-dark: #000000;

JSON

{
  "hex": "#233da1",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 161
  },
  "hsl": {
    "h": 227.619,
    "s": 64.286,
    "l": 38.431
  },
  "oklch": {
    "l": 0.40775,
    "c": 0.16454,
    "h": 267.2
  },
  "luminance": 0.06268
}

Semantic roles & 50–950 ramp

primary

#233DA1

secondary

#C2AD5E

accent

#C541E7

background

#F7F6FB

surface

#EEECF7

border

#C9C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #233DA1

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

Preview Lab → · Contrast checker → · Palette generator →