#121B3E#121B3E

#121B3E is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.6% C 0.068 H 269.7°. Best body text is #FFFFFF at 16.77:1 contrast (WCAG AA passes).

Color values

HEX	#121B3E
RGB	rgb(18, 27, 62)
HSL	hsl(228, 55%, 16%)
HSV	hsv(228, 71%, 24%)
CMYK	cmyk(71%, 56.5%, 0%, 75.7%)
CIE-LAB	lab(10.99, 9.36, -23.72)
CIE-LCH	lch(10.99, 25.50, 291.54°)
OKLab	oklab(23.62% -0.0003 -0.0679)
OKLCH	oklch(23.62% 0.068 269.7)
XYZ	xyz(1.5106, 1.2601, 4.7201)
Luminance	0.0126 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B3E #3E3512

analogous

#12313E #121B3E #1F123E

triadic

#121B3E #3E121B #1B3E12

tetradic

#121B3E #3E1231 #3E3512 #123E1F

square

#121B3E #3E1231 #3E3512 #123E1F

split-complementary

#121B3E #3E1F12 #313E12

monochromatic

#070A18 #070A18 #121B3E #20306D #2E449D

Accessibility & contrast

On white

16.77

#121B3E on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#121B3E on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B3E

16.77:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B3E	#FFFFFF	#000000	##FFFFFF
##121B3E	1.00	16.77	1.25	16.77
#FFFFFF	16.77	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.77	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#09203F

Deuteranopia (green-blind)

#021C3D

Tritanopia (blue-blind)

#002329

Achromatopsia (no color)

#1D1D1D

Design tokens & code

CSS

--color: #121b3e;
/* rgb */ color: rgb(18, 27, 62);
/* oklch */ color: oklch(23.6% 0.068 269.7);

Tailwind

colors: {
  custom: {
    50: '#555673',
    500: '#121b3e',
    950: '#000000',
  },
}

SCSS

$custom: #121b3e;
$custom-light: #555673;
$custom-dark: #000000;

JSON

{
  "hex": "#121b3e",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 62
  },
  "hsl": {
    "h": 227.727,
    "s": 55,
    "l": 15.686
  },
  "oklch": {
    "l": 0.23616,
    "c": 0.06789,
    "h": 269.7
  },
  "luminance": 0.0126
}

Semantic roles & 50–950 ramp

primary

#121B3E

secondary

#776935

accent

#C049DE

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #121B3E

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

Preview Lab → · Contrast checker → · Palette generator →