#183055#183055

#183055 is a dark, moderate blue. Relative luminance 0.030; OKLCH L 31.1% C 0.073 H 258.8°. Best body text is #FFFFFF at 13.18:1 contrast (WCAG AA passes).

Color values

HEX	#183055
RGB	rgb(24, 48, 85)
HSL	hsl(216, 56%, 21%)
HSV	hsv(216, 72%, 33%)
CMYK	cmyk(71.8%, 43.5%, 0%, 66.7%)
CIE-LAB	lab(19.90, 4.55, -25.24)
CIE-LCH	lch(19.90, 25.64, 280.22°)
OKLab	oklab(31.08% -0.0142 -0.0719)
OKLCH	oklch(31.08% 0.073 258.8)
XYZ	xyz(3.0727, 2.9637, 9.0027)
Luminance	0.0296 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183055 #553D18

analogous

#184F55 #183055 #1F1855

triadic

#183055 #551830 #305518

tetradic

#183055 #55184F #553D18 #18551F

square

#183055 #55184F #553D18 #18551F

split-complementary

#183055 #551F18 #4F5518

monochromatic

#070D18 #0B1525 #183055 #254B85 #3366B4

Accessibility & contrast

On white

13.18

#183055 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.59

#183055 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183055

13.18:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183055	#FFFFFF	#000000	##FFFFFF
##183055	1.00	13.18	1.59	13.18
#FFFFFF	13.18	1.00	21.00	1.00
#000000	1.59	21.00	1.00	21.00
##FFFFFF	13.18	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1F3356

Deuteranopia (green-blind)

#162D54

Tritanopia (blue-blind)

#00383E

Achromatopsia (no color)

#303030

Design tokens & code

CSS

--color: #183055;
/* rgb */ color: rgb(24, 48, 85);
/* oklch */ color: oklch(31.1% 0.073 258.8);

Tailwind

colors: {
  custom: {
    50: '#5d6785',
    500: '#183055',
    950: '#000000',
  },
}

SCSS

$custom: #183055;
$custom-light: #5d6785;
$custom-dark: #000000;

JSON

{
  "hex": "#183055",
  "rgb": {
    "r": 24,
    "g": 48,
    "b": 85
  },
  "hsl": {
    "h": 216.393,
    "s": 55.963,
    "l": 21.373
  },
  "oklch": {
    "l": 0.31076,
    "c": 0.07327,
    "h": 258.8
  },
  "luminance": 0.02964
}

Semantic roles & 50–950 ramp

primary

#183055

secondary

#8C6D3D

accent

#A449DF

background

#F5F6F8

surface

#E9EBEF

border

#C5C6CA

text

#04060B

muted

#797A7C

Preview Lab

Preview with #183055

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

Preview Lab → · Contrast checker → · Palette generator →