#233DA8#233DA8

#233DA8 is a dark, vivid blue. Relative luminance 0.065; OKLCH L 41.4% C 0.174 H 267.3°. Best body text is #FFFFFF at 9.11:1 contrast (WCAG AA passes).

Color values

HEX	#233DA8
RGB	rgb(35, 61, 168)
HSL	hsl(228, 66%, 40%)
HSV	hsv(228, 79%, 66%)
CMYK	cmyk(79.2%, 63.7%, 0%, 34.1%)
CIE-LAB	lab(30.69, 30.20, -60.06)
CIE-LCH	lch(30.69, 67.23, 296.69°)
OKLab	oklab(41.42% -0.008 -0.1738)
OKLCH	oklch(41.42% 0.174 267.3)
XYZ	xyz(9.4273, 6.5209, 37.8000)
Luminance	0.0652 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233DA8 #A88E23

analogous

#237FA8 #233DA8 #4C23A8

triadic

#233DA8 #A8233D #3DA823

tetradic

#233DA8 #A8237F #A88E23 #23A84C

square

#233DA8 #A8237F #A88E23 #23A84C

split-complementary

#233DA8 #A84C23 #7FA823

monochromatic

#0E1843 #182B75 #233DA8 #3453D5 #667EDF

Accessibility & contrast

On white

9.11

#233DA8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.30

#233DA8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233DA8

9.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233DA8	#FFFFFF	#000000	##FFFFFF
##233DA8	1.00	9.11	2.30	9.11
#FFFFFF	9.11	1.00	21.00	1.00
#000000	2.30	21.00	1.00	21.00
##FFFFFF	9.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FAB

Deuteranopia (green-blind)

#0042A6

Tritanopia (blue-blind)

#00596C

Achromatopsia (no color)

#484848

Design tokens & code

CSS

--color: #233da8;
/* rgb */ color: rgb(35, 61, 168);
/* oklch */ color: oklch(41.4% 0.174 267.3);

Tailwind

colors: {
  custom: {
    50: '#7472c3',
    500: '#233da8',
    950: '#000000',
  },
}

SCSS

$custom: #233da8;
$custom-light: #7472c3;
$custom-dark: #000000;

JSON

{
  "hex": "#233da8",
  "rgb": {
    "r": 35,
    "g": 61,
    "b": 168
  },
  "hsl": {
    "h": 228.271,
    "s": 65.517,
    "l": 39.804
  },
  "oklch": {
    "l": 0.41419,
    "c": 0.17396,
    "h": 267.3
  },
  "luminance": 0.06522
}

Semantic roles & 50–950 ramp

primary

#233DA8

secondary

#C5B162

accent

#C73FE8

background

#F7F6FC

surface

#EEECF8

border

#C9C7D1

text

#0A0813

muted

#7C7B82

Preview Lab

Preview with #233DA8

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

Preview Lab → · Contrast checker → · Palette generator →