#183155#183155

#183155 is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.3% C 0.072 H 257.7°. Best body text is #FFFFFF at 13.05:1 contrast (WCAG AA passes).

Color values

HEX	#183155
RGB	rgb(24, 49, 85)
HSL	hsl(215, 56%, 21%)
HSV	hsv(215, 72%, 33%)
CMYK	cmyk(71.8%, 42.4%, 0%, 66.7%)
CIE-LAB	lab(20.23, 3.83, -24.71)
CIE-LCH	lch(20.23, 25.01, 278.82°)
OKLab	oklab(31.33% -0.0154 -0.0703)
OKLCH	oklch(31.33% 0.072 257.7)
XYZ	xyz(3.1141, 3.0464, 9.0165)
Luminance	0.0305 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183155 #553C18

analogous

#185055 #183155 #1E1855

triadic

#183155 #551831 #315518

tetradic

#183155 #551850 #553C18 #18551E

square

#183155 #551850 #553C18 #18551E

split-complementary

#183155 #551E18 #505518

monochromatic

#070E18 #0B1525 #183155 #254D85 #3368B4

Accessibility & contrast

On white

13.05

#183155 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.61

#183155 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183155

13.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183155	#FFFFFF	#000000	##FFFFFF
##183155	1.00	13.05	1.61	13.05
#FFFFFF	13.05	1.00	21.00	1.00
#000000	1.61	21.00	1.00	21.00
##FFFFFF	13.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#213456

Deuteranopia (green-blind)

#182E54

Tritanopia (blue-blind)

#00393E

Achromatopsia (no color)

#313131

Design tokens & code

CSS

--color: #183155;
/* rgb */ color: rgb(24, 49, 85);
/* oklch */ color: oklch(31.3% 0.072 257.7);

Tailwind

colors: {
  custom: {
    50: '#5d6885',
    500: '#183155',
    950: '#000000',
  },
}

SCSS

$custom: #183155;
$custom-light: #5d6885;
$custom-dark: #000000;

JSON

{
  "hex": "#183155",
  "rgb": {
    "r": 24,
    "g": 49,
    "b": 85
  },
  "hsl": {
    "h": 215.41,
    "s": 55.963,
    "l": 21.373
  },
  "oklch": {
    "l": 0.31333,
    "c": 0.07198,
    "h": 257.7
  },
  "luminance": 0.03047
}

Semantic roles & 50–950 ramp

primary

#183155

secondary

#8C6B3D

accent

#A149DF

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060B

muted

#797A7C

Preview Lab

Preview with #183155

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

Preview Lab → · Contrast checker → · Palette generator →