#121F3F#121F3F

#121F3F is a very dark, moderate blue. Relative luminance 0.015; OKLCH L 24.7% C 0.063 H 265.4°. Best body text is #FFFFFF at 16.24:1 contrast (WCAG AA passes).

Color values

HEX	#121F3F
RGB	rgb(18, 31, 63)
HSL	hsl(223, 56%, 16%)
HSV	hsv(223, 71%, 25%)
CMYK	cmyk(71.4%, 50.8%, 0%, 75.3%)
CIE-LAB	lab(12.40, 6.70, -22.17)
CIE-LCH	lch(12.40, 23.16, 286.81°)
OKLab	oklab(24.71% -0.0051 -0.0633)
OKLCH	oklch(24.71% 0.063 265.4)
XYZ	xyz(1.6363, 1.4673, 4.8986)
Luminance	0.0147 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F3F #3F3212

analogous

#12353F #121F3F #1B123F

triadic

#121F3F #3F121F #1F3F12

tetradic

#121F3F #3F1235 #3F3212 #123F1B

square

#121F3F #3F1235 #3F3212 #123F1B

split-complementary

#121F3F #3F1B12 #353F12

monochromatic

#070C18 #070C18 #121F3F #20366F #2D4E9E

Accessibility & contrast

On white

16.24

#121F3F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.29

#121F3F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F3F

16.24:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F3F	#FFFFFF	#000000	##FFFFFF
##121F3F	1.00	16.24	1.29	16.24
#FFFFFF	16.24	1.00	21.00	1.00
#000000	1.29	21.00	1.00	21.00
##FFFFFF	16.24	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#102240

Deuteranopia (green-blind)

#091E3E

Tritanopia (blue-blind)

#00262B

Achromatopsia (no color)

#202020

Design tokens & code

CSS

--color: #121f3f;
/* rgb */ color: rgb(18, 31, 63);
/* oklch */ color: oklch(24.7% 0.063 265.4);

Tailwind

colors: {
  custom: {
    50: '#555a74',
    500: '#121f3f',
    950: '#000000',
  },
}

SCSS

$custom: #121f3f;
$custom-light: #555a74;
$custom-dark: #000000;

JSON

{
  "hex": "#121f3f",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 63
  },
  "hsl": {
    "h": 222.667,
    "s": 55.556,
    "l": 15.882
  },
  "oklch": {
    "l": 0.24713,
    "c": 0.06347,
    "h": 265.4
  },
  "luminance": 0.01467
}

Semantic roles & 50–950 ramp

primary

#121F3F

secondary

#786535

accent

#B449DF

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#030308

muted

#78787B

Preview Lab

Preview with #121F3F

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

Preview Lab → · Contrast checker → · Palette generator →