#233DB1#233DB1

#233DB1 is a dark, vivid blue. Relative luminance 0.069; OKLCH L 42.3% C 0.186 H 267.4°. Best body text is #FFFFFF at 8.85:1 contrast (WCAG AA passes).

Color values

HEX	#233DB1
RGB	rgb(35, 61, 177)
HSL	hsl(229, 67%, 42%)
HSV	hsv(229, 80%, 69%)
CMYK	cmyk(80.2%, 65.5%, 0%, 30.6%)
CIE-LAB	lab(31.50, 33.58, -64.11)
CIE-LCH	lch(31.50, 72.37, 297.65°)
OKLab	oklab(42.27% -0.0083 -0.1856)
OKLCH	oklch(42.27% 0.186 267.4)
XYZ	xyz(10.2949, 6.8679, 42.3695)
Luminance	0.0687 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233DB1 #B19723

analogous

#2384B1 #233DB1 #5023B1

triadic

#233DB1 #B1233D #3DB123

tetradic

#233DB1 #B12384 #B19723 #23B150

square

#233DB1 #B12384 #B19723 #23B150

split-complementary

#233DB1 #B15023 #84B123

monochromatic

#0F1A4B #192B7E #233DB1 #3956D8 #6C82E2

Accessibility & contrast

On white

8.85

#233DB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.37

#233DB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233DB1

8.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233DB1	#FFFFFF	#000000	##FFFFFF
##233DB1	1.00	8.85	2.37	8.85
#FFFFFF	8.85	1.00	21.00	1.00
#000000	2.37	21.00	1.00	21.00
##FFFFFF	8.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051B5

Deuteranopia (green-blind)

#0043AF

Tritanopia (blue-blind)

#005C71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #233db1;
/* rgb */ color: rgb(35, 61, 177);
/* oklch */ color: oklch(42.3% 0.186 267.4);

Tailwind

colors: {
  custom: {
    50: '#7772c9',
    500: '#233db1',
    950: '#000000',
  },
}

SCSS

$custom: #233db1;
$custom-light: #7772c9;
$custom-dark: #000000;

JSON

{
  "hex": "#233db1",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 177
  },
  "hsl": {
    "h": 229.014,
    "s": 66.981,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42267,
    "c": 0.1858,
    "h": 267.4
  },
  "luminance": 0.06869
}

Semantic roles & 50–950 ramp

primary

#233DB1

secondary

#C8B768

accent

#CA3EEA

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #233DB1

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

Preview Lab → · Contrast checker → · Palette generator →