#233FB0#233FB0

#233FB0 is a dark, vivid blue. Relative luminance 0.070; OKLCH L 42.5% C 0.182 H 267.0°. Best body text is #FFFFFF at 8.72:1 contrast (WCAG AA passes).

Color values

HEX	#233FB0
RGB	rgb(35, 63, 176)
HSL	hsl(228, 67%, 41%)
HSV	hsv(228, 80%, 69%)
CMYK	cmyk(80.1%, 64.2%, 0%, 31%)
CIE-LAB	lab(31.91, 31.90, -62.85)
CIE-LCH	lch(31.91, 70.48, 296.91°)
OKLab	oklab(42.54% -0.0094 -0.1819)
OKLCH	oklch(42.54% 0.182 267)
XYZ	xyz(10.3044, 7.0457, 41.8828)
Luminance	0.0705 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233FB0 #B09423

analogous

#2386B0 #233FB0 #4E23B0

triadic

#233FB0 #B0233F #3FB023

tetradic

#233FB0 #B02386 #B09423 #23B04E

square

#233FB0 #B02386 #B09423 #23B04E

split-complementary

#233FB0 #B04E23 #86B023

monochromatic

#0F1A4A #192D7D #233FB0 #3958D8 #6C83E2

Accessibility & contrast

On white

8.72

#233FB0 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.41

#233FB0 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233FB0

8.72:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233FB0	#FFFFFF	#000000	##FFFFFF
##233FB0	1.00	8.72	2.41	8.72
#FFFFFF	8.72	1.00	21.00	1.00
#000000	2.41	21.00	1.00	21.00
##FFFFFF	8.72	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0052B4

Deuteranopia (green-blind)

#0045AE

Tritanopia (blue-blind)

#005D71

Achromatopsia (no color)

#4B4B4B

Design tokens & code

CSS

--color: #233fb0;
/* rgb */ color: rgb(35, 63, 176);
/* oklch */ color: oklch(42.5% 0.182 267.0);

Tailwind

colors: {
  custom: {
    50: '#7673c9',
    500: '#233fb0',
    950: '#000000',
  },
}

SCSS

$custom: #233fb0;
$custom-light: #7673c9;
$custom-dark: #000000;

JSON

{
  "hex": "#233fb0",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 176
  },
  "hsl": {
    "h": 228.085,
    "s": 66.825,
    "l": 41.373
  },
  "oklch": {
    "l": 0.42539,
    "c": 0.18214,
    "h": 267
  },
  "luminance": 0.07047
}

Semantic roles & 50–950 ramp

primary

#233FB0

secondary

#C8B567

accent

#C83EEA

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #233FB0

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

Preview Lab → · Contrast checker → · Palette generator →