#233B9B#233B9B

#233B9B is a dark, vivid blue. Relative luminance 0.059; OKLCH L 39.8% C 0.159 H 267.6°. Best body text is #FFFFFF at 9.68:1 contrast (WCAG AA passes).

Color values

HEX	#233B9B
RGB	rgb(35, 59, 155)
HSL	hsl(228, 63%, 37%)
HSV	hsv(228, 77%, 61%)
CMYK	cmyk(77.4%, 61.9%, 0%, 39.2%)
CIE-LAB	lab(29.03, 26.57, -54.92)
CIE-LCH	lch(29.03, 61.00, 295.82°)
OKLab	oklab(39.84% -0.0066 -0.1587)
OKLCH	oklch(39.84% 0.159 267.6)
XYZ	xyz(8.1714, 5.8509, 31.7027)
Luminance	0.0585 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#233B9B #9B8323

analogous

#23779B #233B9B #47239B

triadic

#233B9B #9B233B #3B9B23

tetradic

#233B9B #9B2377 #9B8323 #239B47

square

#233B9B #9B2377 #9B8323 #239B47

split-complementary

#233B9B #9B4723 #779B23

monochromatic

#0C1537 #182869 #233B9B #2E4ECD #5E77DB

Accessibility & contrast

On white

9.68

#233B9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.17

#233B9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #233B9B

9.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##233B9B	#FFFFFF	#000000	##FFFFFF
##233B9B	1.00	9.68	2.17	9.68
#FFFFFF	9.68	1.00	21.00	1.00
#000000	2.17	21.00	1.00	21.00
##FFFFFF	9.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004A9E

Deuteranopia (green-blind)

#003F99

Tritanopia (blue-blind)

#005465

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #233b9b;
/* rgb */ color: rgb(35, 59, 155);
/* oklch */ color: oklch(39.8% 0.159 267.6);

Tailwind

colors: {
  custom: {
    50: '#7170b9',
    500: '#233b9b',
    950: '#000000',
  },
}

SCSS

$custom: #233b9b;
$custom-light: #7170b9;
$custom-dark: #000000;

JSON

{
  "hex": "#233b9b",
  "rgb": {
    "r": 35,
    "g": 59,
    "b": 155
  },
  "hsl": {
    "h": 228,
    "s": 63.158,
    "l": 37.255
  },
  "oklch": {
    "l": 0.3984,
    "c": 0.15884,
    "h": 267.6
  },
  "luminance": 0.05852
}

Semantic roles & 50–950 ramp

primary

#233B9B

secondary

#BFAB5A

accent

#C542E6

background

#F7F6FB

surface

#EDECF6

border

#C8C7D0

text

#090712

muted

#7B7A81

Preview Lab

Preview with #233B9B

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

Preview Lab → · Contrast checker → · Palette generator →