#233F71#233F71

#233F71 is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.3% C 0.093 H 261.1°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#233F71
RGB	rgb(35, 63, 113)
HSL	hsl(218, 53%, 29%)
HSV	hsv(218, 69%, 44%)
CMYK	cmyk(69%, 44.2%, 0%, 55.7%)
CIE-LAB	lab(27.03, 7.34, -32.05)
CIE-LCH	lch(27.03, 32.87, 282.90°)
OKLab	oklab(37.33% -0.0143 -0.0914)
OKLCH	oklch(37.33% 0.093 261.1)
XYZ	xyz(5.4502, 5.1041, 16.3175)
Luminance	0.0510 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233F71 #715523

analogous

#236671 #233F71 #2E2371

triadic

#233F71 #71233F #3F7123

tetradic

#233F71 #712366 #715523 #23712E

square

#233F71 #712366 #715523 #23712E

split-complementary

#233F71 #712E23 #667123

monochromatic

#070D17 #152542 #233F71 #3159A0 #4875C6

Accessibility & contrast

On white

10.39

#233F71 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#233F71 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233F71

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233F71	#FFFFFF	#000000	##FFFFFF
##233F71	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#284473

Deuteranopia (green-blind)

#1C3D70

Tritanopia (blue-blind)

#004A52

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #233f71;
/* rgb */ color: rgb(35, 63, 113);
/* oklch */ color: oklch(37.3% 0.093 261.1);

Tailwind

colors: {
  custom: {
    50: '#67739a',
    500: '#233f71',
    950: '#000000',
  },
}

SCSS

$custom: #233f71;
$custom-light: #67739a;
$custom-dark: #000000;

JSON

{
  "hex": "#233f71",
  "rgb": {
    "r": 35,
    "g": 63,
    "b": 113
  },
  "hsl": {
    "h": 218.462,
    "s": 52.703,
    "l": 29.02
  },
  "oklch": {
    "l": 0.37325,
    "c": 0.09253,
    "h": 261.1
  },
  "luminance": 0.05105
}

Semantic roles & 50–950 ramp

primary

#233F71

secondary

#A4844C

accent

#A84CDC

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06080E

muted

#7A7B7E

Preview Lab

Preview with #233F71

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

Preview Lab → · Contrast checker → · Palette generator →