#233CB1#233CB1

#233CB1 is a dark, vivid blue. Relative luminance 0.068; OKLCH L 42.1% C 0.187 H 267.6°. Best body text is #FFFFFF at 8.93:1 contrast (WCAG AA passes).

Color values

HEX	#233CB1
RGB	rgb(35, 60, 177)
HSL	hsl(229, 67%, 42%)
HSV	hsv(229, 80%, 69%)
CMYK	cmyk(80.2%, 66.1%, 0%, 30.6%)
CIE-LAB	lab(31.26, 34.23, -64.51)
CIE-LCH	lch(31.26, 73.03, 297.95°)
OKLab	oklab(42.09% -0.0078 -0.1868)
OKLCH	oklch(42.09% 0.187 267.6)
XYZ	xyz(10.2420, 6.7622, 42.3519)
Luminance	0.0676 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233CB1 #B19823

analogous

#2383B1 #233CB1 #5123B1

triadic

#233CB1 #B1233C #3CB123

tetradic

#233CB1 #B12383 #B19823 #23B151

square

#233CB1 #B12383 #B19823 #23B151

split-complementary

#233CB1 #B15123 #83B123

monochromatic

#0F194B #192B7E #233CB1 #3955D8 #6C81E2

Accessibility & contrast

On white

8.93

#233CB1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#233CB1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233CB1

8.93:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233CB1	#FFFFFF	#000000	##FFFFFF
##233CB1	1.00	8.93	2.35	8.93
#FFFFFF	8.93	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.93	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050B5

Deuteranopia (green-blind)

#0043AF

Tritanopia (blue-blind)

#005B71

Achromatopsia (no color)

#4A4A4A

Design tokens & code

CSS

--color: #233cb1;
/* rgb */ color: rgb(35, 60, 177);
/* oklch */ color: oklch(42.1% 0.187 267.6);

Tailwind

colors: {
  custom: {
    50: '#7771c9',
    500: '#233cb1',
    950: '#000000',
  },
}

SCSS

$custom: #233cb1;
$custom-light: #7771c9;
$custom-dark: #000000;

JSON

{
  "hex": "#233cb1",
  "rgb": {
    "r": 35,
    "g": 60,
    "b": 177
  },
  "hsl": {
    "h": 229.437,
    "s": 66.981,
    "l": 41.569
  },
  "oklch": {
    "l": 0.42088,
    "c": 0.18695,
    "h": 267.6
  },
  "luminance": 0.06763
}

Semantic roles & 50–950 ramp

primary

#233CB1

secondary

#C8B768

accent

#CC3EEA

background

#F8F6FC

surface

#EFECF8

border

#CAC7D1

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #233CB1

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

Preview Lab → · Contrast checker → · Palette generator →