#121B3F#121B3F

#121B3F is a very dark, moderate blue. Relative luminance 0.013; OKLCH L 23.7% C 0.070 H 269.8°. Best body text is #FFFFFF at 16.74:1 contrast (WCAG AA passes).

Color values

HEX	#121B3F
RGB	rgb(18, 27, 63)
HSL	hsl(228, 56%, 16%)
HSV	hsv(228, 71%, 25%)
CMYK	cmyk(71.4%, 57.1%, 0%, 75.3%)
CIE-LAB	lab(11.07, 9.78, -24.30)
CIE-LCH	lch(11.07, 26.19, 291.93°)
OKLab	oklab(23.7% -0.0002 -0.0696)
OKLCH	oklch(23.7% 0.07 269.8)
XYZ	xyz(1.5383, 1.2712, 4.8660)
Luminance	0.0127 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B3F #3F3612

analogous

#12313F #121B3F #1F123F

triadic

#121B3F #3F121B #1B3F12

tetradic

#121B3F #3F1231 #3F3612 #123F1F

square

#121B3F #3F1231 #3F3612 #123F1F

split-complementary

#121B3F #3F1F12 #313F12

monochromatic

#070A18 #070A18 #121B3F #202F6F #2D449E

Accessibility & contrast

On white

16.74

#121B3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.25

#121B3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B3F

16.74:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B3F	#FFFFFF	#000000	##FFFFFF
##121B3F	1.00	16.74	1.25	16.74
#FFFFFF	16.74	1.00	21.00	1.00
#000000	1.25	21.00	1.00	21.00
##FFFFFF	16.74	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#072040

Deuteranopia (green-blind)

#011C3E

Tritanopia (blue-blind)

#00232A

Achromatopsia (no color)

#1E1E1E

Design tokens & code

CSS

--color: #121b3f;
/* rgb */ color: rgb(18, 27, 63);
/* oklch */ color: oklch(23.7% 0.070 269.8);

Tailwind

colors: {
  custom: {
    50: '#565674',
    500: '#121b3f',
    950: '#000000',
  },
}

SCSS

$custom: #121b3f;
$custom-light: #565674;
$custom-dark: #000000;

JSON

{
  "hex": "#121b3f",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 63
  },
  "hsl": {
    "h": 228,
    "s": 55.556,
    "l": 15.882
  },
  "oklch": {
    "l": 0.23701,
    "c": 0.06959,
    "h": 269.8
  },
  "luminance": 0.01271
}

Semantic roles & 50–950 ramp

primary

#121B3F

secondary

#786B35

accent

#C149DF

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #121B3F

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

Preview Lab → · Contrast checker → · Palette generator →