#183B6C#183B6C

#183B6C is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.5% C 0.094 H 257.4°. Best body text is #FFFFFF at 11.16:1 contrast (WCAG AA passes).

Color values

HEX	#183B6C
RGB	rgb(24, 59, 108)
HSL	hsl(215, 64%, 26%)
HSV	hsv(215, 78%, 42%)
CMYK	cmyk(77.8%, 45.4%, 0%, 57.6%)
CIE-LAB	lab(24.97, 6.25, -32.18)
CIE-LCH	lch(24.97, 32.78, 280.99°)
OKLab	oklab(35.49% -0.0205 -0.0921)
OKLCH	oklch(35.49% 0.094 257.4)
XYZ	xyz(4.6464, 4.4043, 14.7897)
Luminance	0.0440 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B6C #6C4918

analogous

#18656C #183B6C #1F186C

triadic

#183B6C #6C183B #3B6C18

tetradic

#183B6C #6C1865 #6C4918 #186C1F

square

#183B6C #6C1865 #6C4918 #186C1F

split-complementary

#183B6C #6C1F18 #656C18

monochromatic

#060E19 #0D203A #183B6C #23569E #2E72D0

Accessibility & contrast

On white

11.16

#183B6C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.88

#183B6C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B6C

11.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B6C	#FFFFFF	#000000	##FFFFFF
##183B6C	1.00	11.16	1.88	11.16
#FFFFFF	11.16	1.00	21.00	1.00
#000000	1.88	21.00	1.00	21.00
##FFFFFF	11.16	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#233F6E

Deuteranopia (green-blind)

#14386B

Tritanopia (blue-blind)

#00474E

Achromatopsia (no color)

#3B3B3B

Design tokens & code

CSS

--color: #183b6c;
/* rgb */ color: rgb(24, 59, 108);
/* oklch */ color: oklch(35.5% 0.094 257.4);

Tailwind

colors: {
  custom: {
    50: '#627096',
    500: '#183b6c',
    950: '#000000',
  },
}

SCSS

$custom: #183b6c;
$custom-light: #627096;
$custom-dark: #000000;

JSON

{
  "hex": "#183b6c",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 108
  },
  "hsl": {
    "h": 215,
    "s": 63.636,
    "l": 25.882
  },
  "oklch": {
    "l": 0.3549,
    "c": 0.09432,
    "h": 257.4
  },
  "luminance": 0.04405
}

Semantic roles & 50–950 ramp

primary

#183B6C

secondary

#A2783E

accent

#A241E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183B6C

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

Preview Lab → · Contrast checker → · Palette generator →