#121B4B#121B4B

#121B4B is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.8% C 0.089 H 270.4°. Best body text is #FFFFFF at 16.36:1 contrast (WCAG AA passes).

Color values

HEX	#121B4B
RGB	rgb(18, 27, 75)
HSL	hsl(231, 61%, 18%)
HSV	hsv(231, 76%, 29%)
CMYK	cmyk(76%, 64%, 0%, 70.6%)
CIE-LAB	lab(12.09, 14.87, -31.03)
CIE-LCH	lch(12.09, 34.41, 295.61°)
OKLab	oklab(24.79% 0.0007 -0.0894)
OKLCH	oklch(24.79% 0.089 270.4)
XYZ	xyz(1.9110, 1.4203, 6.8287)
Luminance	0.0142 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B4B #4B4212

analogous

#12374B #121B4B #25124B

triadic

#121B4B #4B121B #1B4B12

tetradic

#121B4B #4B1237 #4B4212 #124B25

square

#121B4B #4B1237 #4B4212 #124B25

split-complementary

#121B4B #4B2512 #374B12

monochromatic

#060919 #06091A #121B4B #1E2D7C #2A3FAE

Accessibility & contrast

On white

16.36

#121B4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.28

#121B4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B4B

16.36:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B4B	#FFFFFF	#000000	##FFFFFF
##121B4B	1.00	16.36	1.28	16.36
#FFFFFF	16.36	1.00	21.00	1.00
#000000	1.28	21.00	1.00	21.00
##FFFFFF	16.36	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00224D

Deuteranopia (green-blind)

#001D4A

Tritanopia (blue-blind)

#002730

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #121b4b;
/* rgb */ color: rgb(18, 27, 75);
/* oklch */ color: oklch(24.8% 0.089 270.4);

Tailwind

colors: {
  custom: {
    50: '#59577e',
    500: '#121b4b',
    950: '#000000',
  },
}

SCSS

$custom: #121b4b;
$custom-light: #59577e;
$custom-dark: #000000;

JSON

{
  "hex": "#121b4b",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 75
  },
  "hsl": {
    "h": 230.526,
    "s": 61.29,
    "l": 18.235
  },
  "oklch": {
    "l": 0.24791,
    "c": 0.08939,
    "h": 270.4
  },
  "luminance": 0.0142
}

Semantic roles & 50–950 ramp

primary

#121B4B

secondary

#847835

accent

#CB43E4

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #121B4B

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

Preview Lab → · Contrast checker → · Palette generator →