#233FB4#233FB4

#233FB4 is a dark, vivid blue. Relative luminance 0.072; OKLCH L 42.9% C 0.187 H 267.1°. Best body text is #FFFFFF at 8.60:1 contrast (WCAG AA passes).

Color values

HEX	#233FB4
RGB	rgb(35, 63, 180)
HSL	hsl(228, 67%, 42%)
HSV	hsv(228, 81%, 71%)
CMYK	cmyk(80.6%, 65%, 0%, 29.4%)
CIE-LAB	lab(32.27, 33.40, -64.63)
CIE-LCH	lch(32.27, 72.75, 297.33°)
OKLab	oklab(42.92% -0.0095 -0.1871)
OKLCH	oklch(42.92% 0.187 267.1)
XYZ	xyz(10.7060, 7.2064, 43.9979)
Luminance	0.0721 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233FB4 #B49823

analogous

#2387B4 #233FB4 #5023B4

triadic

#233FB4 #B4233F #3FB423

tetradic

#233FB4 #B42387 #B49823 #23B450

square

#233FB4 #B42387 #B49823 #23B450

split-complementary

#233FB4 #B45023 #87B423

monochromatic

#0F1B4E #192D81 #233FB4 #3B5AD9 #6E85E3

Accessibility & contrast

On white

8.60

#233FB4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.44

#233FB4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233FB4

8.60:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233FB4	#FFFFFF	#000000	##FFFFFF
##233FB4	1.00	8.60	2.44	8.60
#FFFFFF	8.60	1.00	21.00	1.00
#000000	2.44	21.00	1.00	21.00
##FFFFFF	8.60	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0053B8

Deuteranopia (green-blind)

#0045B2

Tritanopia (blue-blind)

#005E74

Achromatopsia (no color)

#4C4C4C

Design tokens & code

CSS

--color: #233fb4;
/* rgb */ color: rgb(35, 63, 180);
/* oklch */ color: oklch(42.9% 0.187 267.1);

Tailwind

colors: {
  custom: {
    50: '#7774cb',
    500: '#233fb4',
    950: '#000000',
  },
}

SCSS

$custom: #233fb4;
$custom-light: #7774cb;
$custom-dark: #000000;

JSON

{
  "hex": "#233fb4",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 180
  },
  "hsl": {
    "h": 228.414,
    "s": 67.442,
    "l": 42.157
  },
  "oklch": {
    "l": 0.42915,
    "c": 0.18736,
    "h": 267.1
  },
  "luminance": 0.07208
}

Semantic roles & 50–950 ramp

primary

#233FB4

secondary

#C9B769

accent

#C93DEA

background

#F8F7FC

surface

#EFEDF9

border

#CAC8D2

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #233FB4

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

Preview Lab → · Contrast checker → · Palette generator →