#183B7B#183B7B

#183B7B is a dark, moderate blue. Relative luminance 0.048; OKLCH L 36.6% C 0.117 H 261.2°. Best body text is #FFFFFF at 10.77:1 contrast (WCAG AA passes).

Color values

HEX	#183B7B
RGB	rgb(24, 59, 123)
HSL	hsl(219, 67%, 29%)
HSV	hsv(219, 80%, 48%)
CMYK	cmyk(80.5%, 52%, 0%, 51.8%)
CIE-LAB	lab(26.01, 12.47, -40.03)
CIE-LCH	lch(26.01, 41.92, 287.30°)
OKLab	oklab(36.64% -0.0178 -0.1151)
OKLCH	oklch(36.64% 0.117 261.2)
XYZ	xyz(5.5145, 4.7515, 19.3616)
Luminance	0.0475 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#183B7B #7B5818

analogous

#186D7B #183B7B #27187B

triadic

#183B7B #7B183B #3B7B18

tetradic

#183B7B #7B186D #7B5818 #187B27

square

#183B7B #7B186D #7B5818 #187B27

split-complementary

#183B7B #7B2718 #6D7B18

monochromatic

#050C1A #0E2248 #183B7B #2254AE #366FD8

Accessibility & contrast

On white

10.77

#183B7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#183B7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #183B7B

10.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##183B7B	#FFFFFF	#000000	##FFFFFF
##183B7B	1.00	10.77	1.95	10.77
#FFFFFF	10.77	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#14427D

Deuteranopia (green-blind)

#00397A

Tritanopia (blue-blind)

#004A55

Achromatopsia (no color)

#3E3E3E

Design tokens & code

CSS

--color: #183b7b;
/* rgb */ color: rgb(24, 59, 123);
/* oklch */ color: oklch(36.6% 0.117 261.2);

Tailwind

colors: {
  custom: {
    50: '#6670a2',
    500: '#183b7b',
    950: '#000000',
  },
}

SCSS

$custom: #183b7b;
$custom-light: #6670a2;
$custom-dark: #000000;

JSON

{
  "hex": "#183b7b",
  "rgb": {
    "r": 24,
    "g": 59,
    "b": 123
  },
  "hsl": {
    "h": 218.788,
    "s": 67.347,
    "l": 28.824
  },
  "oklch": {
    "l": 0.36635,
    "c": 0.11651,
    "h": 261.2
  },
  "luminance": 0.04752
}

Semantic roles & 50–950 ramp

primary

#183B7B

secondary

#B0883F

accent

#AD3EEA

background

#F6F6FA

surface

#EBECF3

border

#C6C7CD

text

#07070F

muted

#7A7A7F

Preview Lab

Preview with #183B7B

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

Preview Lab → · Contrast checker → · Palette generator →