#183B6E#183B6E

#183B6E is a dark, moderate blue. Relative luminance 0.044; OKLCH L 35.6% C 0.097 H 258.1°. Best body text is #FFFFFF at 11.11:1 contrast (WCAG AA passes).

Color values

HEX	#183B6E
RGB	rgb(24, 59, 110)
HSL	hsl(216, 64%, 26%)
HSV	hsv(216, 78%, 43%)
CMYK	cmyk(78.2%, 46.4%, 0%, 56.9%)
CIE-LAB	lab(25.10, 7.08, -33.25)
CIE-LCH	lch(25.10, 33.99, 282.01°)
OKLab	oklab(35.64% -0.0201 -0.0952)
OKLCH	oklch(35.64% 0.097 258.1)
XYZ	xyz(4.7541, 4.4474, 15.3567)
Luminance	0.0445 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B6E #6E4B18

analogous

#18666E #183B6E #20186E

triadic

#183B6E #6E183B #3B6E18

tetradic

#183B6E #6E1866 #6E4B18 #186E20

square

#183B6E #6E1866 #6E4B18 #186E20

split-complementary

#183B6E #6E2018 #666E18

monochromatic

#050D19 #0D203C #183B6E #2356A0 #2F71D2

Accessibility & contrast

On white

11.11

#183B6E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.89

#183B6E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B6E

11.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B6E	#FFFFFF	#000000	##FFFFFF
##183B6E	1.00	11.11	1.89	11.11
#FFFFFF	11.11	1.00	21.00	1.00
#000000	1.89	21.00	1.00	21.00
##FFFFFF	11.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214070

Deuteranopia (green-blind)

#11386D

Tritanopia (blue-blind)

#00474F

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #183b6e;
/* rgb */ color: rgb(24, 59, 110);
/* oklch */ color: oklch(35.6% 0.097 258.1);

Tailwind

colors: {
  custom: {
    50: '#627098',
    500: '#183b6e',
    950: '#000000',
  },
}

SCSS

$custom: #183b6e;
$custom-light: #627098;
$custom-dark: #000000;

JSON

{
  "hex": "#183b6e",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 110
  },
  "hsl": {
    "h": 215.581,
    "s": 64.179,
    "l": 26.275
  },
  "oklch": {
    "l": 0.35636,
    "c": 0.09729,
    "h": 258.1
  },
  "luminance": 0.04448
}

Semantic roles & 50–950 ramp

primary

#183B6E

secondary

#A47A3E

accent

#A341E7

background

#F6F6F9

surface

#EBECF2

border

#C6C7CC

text

#06070D

muted

#7A7A7E

Preview Lab

Preview with #183B6E

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

Preview Lab → · Contrast checker → · Palette generator →