#181F5C#181F5C

#181F5C is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.7% C 0.108 H 272.2°. Best body text is #FFFFFF at 15.11:1 contrast (WCAG AA passes).

Color values

HEX	#181F5C
RGB	rgb(24, 31, 92)
HSL	hsl(234, 59%, 23%)
HSV	hsv(234, 74%, 36%)
CMYK	cmyk(73.9%, 66.3%, 0%, 63.9%)
CIE-LAB	lab(15.20, 19.88, -37.48)
CIE-LCH	lch(15.20, 42.43, 297.94°)
OKLab	oklab(27.69% 0.0041 -0.1081)
OKLCH	oklch(27.69% 0.108 272.2)
XYZ	xyz(2.7978, 1.9466, 10.3514)
Luminance	0.0195 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#181F5C #5C5518

analogous

#18415C #181F5C #33185C

triadic

#181F5C #5C181F #1F5C18

tetradic

#181F5C #5C1841 #5C5518 #185C33

square

#181F5C #5C1841 #5C5518 #185C33

split-complementary

#181F5C #5C3318 #415C18

monochromatic

#060818 #0B0F2B #181F5C #252F8D #3140BD

Accessibility & contrast

On white

15.11

#181F5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.39

#181F5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #181F5C

15.11:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##181F5C	#FFFFFF	#000000	##FFFFFF
##181F5C	1.00	15.11	1.39	15.11
#FFFFFF	15.11	1.00	21.00	1.00
#000000	1.39	21.00	1.00	21.00
##FFFFFF	15.11	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295E

Deuteranopia (green-blind)

#00235B

Tritanopia (blue-blind)

#002E3A

Achromatopsia (no color)

#262626

Design tokens & code

CSS

--color: #181f5c;
/* rgb */ color: rgb(24, 31, 92);
/* oklch */ color: oklch(27.7% 0.108 272.2);

Tailwind

colors: {
  custom: {
    50: '#5f5a8b',
    500: '#181f5c',
    950: '#000000',
  },
}

SCSS

$custom: #181f5c;
$custom-light: #5f5a8b;
$custom-dark: #000000;

JSON

{
  "hex": "#181f5c",
  "rgb": {
    "r": 24,
    "g": 31,
    "b": 92
  },
  "hsl": {
    "h": 233.824,
    "s": 58.621,
    "l": 22.745
  },
  "oklch": {
    "l": 0.27691,
    "c": 0.10821,
    "h": 272.2
  },
  "luminance": 0.01947
}

Semantic roles & 50–950 ramp

primary

#181F5C

secondary

#938A3D

accent

#D246E2

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #181F5C

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

Preview Lab → · Contrast checker → · Palette generator →