#231A5B#231A5B

#231A5B is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.5% C 0.111 H 282.6°. Best body text is #FFFFFF at 15.33:1 contrast (WCAG AA passes).

Color values

HEX	#231A5B
RGB	rgb(35, 26, 91)
HSL	hsl(248, 56%, 23%)
HSV	hsv(248, 71%, 36%)
CMYK	cmyk(61.5%, 71.4%, 0%, 64.3%)
CIE-LAB	lab(14.69, 24.87, -37.62)
CIE-LCH	lch(14.69, 45.10, 303.47°)
OKLab	oklab(27.51% 0.0242 -0.1082)
OKLCH	oklch(27.51% 0.111 282.6)
XYZ	xyz(2.9503, 1.8513, 10.0974)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#231A5B #525B1A

analogous

#1A315B #231A5B #431A5B

triadic

#231A5B #5B231A #1A5B23

tetradic

#231A5B #5B1A31 #525B1A #1A5B43

square

#231A5B #5B1A31 #525B1A #1A5B43

split-complementary

#231A5B #5B431A #315B1A

monochromatic

#090718 #110C2B #231A5B #35288B #4835BA

Accessibility & contrast

On white

15.33

#231A5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#231A5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #231A5B

15.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##231A5B	#FFFFFF	#000000	##FFFFFF
##231A5B	1.00	15.33	1.37	15.33
#FFFFFF	15.33	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00235A

Tritanopia (blue-blind)

#052B38

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #231a5b;
/* rgb */ color: rgb(35, 26, 91);
/* oklch */ color: oklch(27.5% 0.111 282.6);

Tailwind

colors: {
  custom: {
    50: '#65578a',
    500: '#231a5b',
    950: '#000000',
  },
}

SCSS

$custom: #231a5b;
$custom-light: #65578a;
$custom-dark: #000000;

JSON

{
  "hex": "#231a5b",
  "rgb": {
    "r": 35,
    "g": 26,
    "b": 91
  },
  "hsl": {
    "h": 248.308,
    "s": 55.556,
    "l": 22.941
  },
  "oklch": {
    "l": 0.27512,
    "c": 0.11089,
    "h": 282.6
  },
  "luminance": 0.01851
}

Semantic roles & 50–950 ramp

primary

#231A5B

secondary

#869140

accent

#DF49CA

background

#F6F5F8

surface

#EBE9F0

border

#C6C5CB

text

#06030C

muted

#7A787D

Preview Lab

Preview with #231A5B

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

Preview Lab → · Contrast checker → · Palette generator →