#233FA8#233FA8

#233FA8 is a dark, vivid blue. Relative luminance 0.067; OKLCH L 41.8% C 0.172 H 266.9°. Best body text is #FFFFFF at 8.94:1 contrast (WCAG AA passes).

Color values

HEX	#233FA8
RGB	rgb(35, 63, 168)
HSL	hsl(227, 66%, 40%)
HSV	hsv(227, 79%, 66%)
CMYK	cmyk(79.2%, 62.5%, 0%, 34.1%)
CIE-LAB	lab(31.20, 28.87, -59.22)
CIE-LCH	lch(31.20, 65.89, 295.99°)
OKLab	oklab(41.8% -0.0093 -0.1713)
OKLCH	oklch(41.8% 0.172 266.9)
XYZ	xyz(9.5361, 6.7384, 37.8363)
Luminance	0.0674 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233FA8 #A88C23

analogous

#2382A8 #233FA8 #4923A8

triadic

#233FA8 #A8233F #3FA823

tetradic

#233FA8 #A82382 #A88C23 #23A849

square

#233FA8 #A82382 #A88C23 #23A849

split-complementary

#233FA8 #A84923 #82A823

monochromatic

#0E1943 #182C75 #233FA8 #3455D5 #6680DF

Accessibility & contrast

On white

8.94

#233FA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.35

#233FA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233FA8

8.94:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233FA8	#FFFFFF	#000000	##FFFFFF
##233FA8	1.00	8.94	2.35	8.94
#FFFFFF	8.94	1.00	21.00	1.00
#000000	2.35	21.00	1.00	21.00
##FFFFFF	8.94	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0050AB

Deuteranopia (green-blind)

#0043A6

Tritanopia (blue-blind)

#005A6D

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #233fa8;
/* rgb */ color: rgb(35, 63, 168);
/* oklch */ color: oklch(41.8% 0.172 266.9);

Tailwind

colors: {
  custom: {
    50: '#7473c3',
    500: '#233fa8',
    950: '#000000',
  },
}

SCSS

$custom: #233fa8;
$custom-light: #7473c3;
$custom-dark: #000000;

JSON

{
  "hex": "#233fa8",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 168
  },
  "hsl": {
    "h": 227.368,
    "s": 65.517,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41798,
    "c": 0.17153,
    "h": 266.9
  },
  "luminance": 0.06739
}

Semantic roles & 50–950 ramp

primary

#233FA8

secondary

#C5B062

accent

#C53FE8

background

#F7F7FC

surface

#EEEDF8

border

#C9C8D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #233FA8

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

Preview Lab → · Contrast checker → · Palette generator →