#121B4C#121B4C

#121B4C is a very dark, moderate blue. Relative luminance 0.014; OKLCH L 24.9% C 0.091 H 270.4°. Best body text is #FFFFFF at 16.32:1 contrast (WCAG AA passes).

Color values

HEX	#121B4C
RGB	rgb(18, 27, 76)
HSL	hsl(231, 62%, 18%)
HSV	hsv(231, 76%, 30%)
CMYK	cmyk(76.3%, 64.5%, 0%, 70.2%)
CIE-LAB	lab(12.18, 15.29, -31.57)
CIE-LCH	lch(12.18, 35.08, 295.85°)
OKLab	oklab(24.89% 0.0007 -0.091)
OKLCH	oklch(24.89% 0.091 270.4)
XYZ	xyz(1.9454, 1.4341, 7.0104)
Luminance	0.0143 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B4C #4C4312

analogous

#12384C #121B4C #26124C

triadic

#121B4C #4C121B #1B4C12

tetradic

#121B4C #4C1238 #4C4312 #124C26

square

#121B4C #4C1238 #4C4312 #124C26

split-complementary

#121B4C #4C2612 #384C12

monochromatic

#060919 #06091B #121B4C #1E2D7D #293EAF

Accessibility & contrast

On white

16.32

#121B4C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#121B4C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B4C

16.32:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B4C	#FFFFFF	#000000	##FFFFFF
##121B4C	1.00	16.32	1.29	16.32
#FFFFFF	16.32	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.32	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00234E

Deuteranopia (green-blind)

#001D4B

Tritanopia (blue-blind)

#002730

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #121b4c;
/* rgb */ color: rgb(18, 27, 76);
/* oklch */ color: oklch(24.9% 0.091 270.4);

Tailwind

colors: {
  custom: {
    50: '#59577e',
    500: '#121b4c',
    950: '#000000',
  },
}

SCSS

$custom: #121b4c;
$custom-light: #59577e;
$custom-dark: #000000;

JSON

{
  "hex": "#121b4c",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 76
  },
  "hsl": {
    "h": 230.69,
    "s": 61.702,
    "l": 18.431
  },
  "oklch": {
    "l": 0.24887,
    "c": 0.09098,
    "h": 270.4
  },
  "luminance": 0.01434
}

Semantic roles & 50–950 ramp

primary

#121B4C

secondary

#857935

accent

#CC43E5

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #121B4C

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

Preview Lab → · Contrast checker → · Palette generator →