#121F4B#121F4B

#121F4B is a dark, moderate blue. Relative luminance 0.016; OKLCH L 25.7% C 0.083 H 267.7°. Best body text is #FFFFFF at 15.87:1 contrast (WCAG AA passes).

Color values

HEX	#121F4B
RGB	rgb(18, 31, 75)
HSL	hsl(226, 61%, 18%)
HSV	hsv(226, 76%, 29%)
CMYK	cmyk(76%, 58.7%, 0%, 70.6%)
CIE-LAB	lab(13.33, 11.82, -29.02)
CIE-LCH	lch(13.33, 31.34, 292.17°)
OKLab	oklab(25.72% -0.0033 -0.0834)
OKLCH	oklch(25.72% 0.083 267.7)
XYZ	xyz(2.0090, 1.6164, 6.8614)
Luminance	0.0162 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F4B #4B3E12

analogous

#123B4B #121F4B #21124B

triadic

#121F4B #4B121F #1F4B12

tetradic

#121F4B #4B123B #4B3E12 #124B21

square

#121F4B #4B123B #4B3E12 #124B21

split-complementary

#121F4B #4B2112 #3B4B12

monochromatic

#060A19 #060B1A #121F4B #1E337C #2A48AE

Accessibility & contrast

On white

15.87

#121F4B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.32

#121F4B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F4B

15.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F4B	#FFFFFF	#000000	##FFFFFF
##121F4B	1.00	15.87	1.32	15.87
#FFFFFF	15.87	1.00	21.00	1.00
#000000	1.32	21.00	1.00	21.00
##FFFFFF	15.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#03254D

Deuteranopia (green-blind)

#00204A

Tritanopia (blue-blind)

#002A31

Achromatopsia (no color)

#222222

Design tokens & code

CSS

--color: #121f4b;
/* rgb */ color: rgb(18, 31, 75);
/* oklch */ color: oklch(25.7% 0.083 267.7);

Tailwind

colors: {
  custom: {
    50: '#585a7e',
    500: '#121f4b',
    950: '#000000',
  },
}

SCSS

$custom: #121f4b;
$custom-light: #585a7e;
$custom-dark: #000000;

JSON

{
  "hex": "#121f4b",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 75
  },
  "hsl": {
    "h": 226.316,
    "s": 61.29,
    "l": 18.235
  },
  "oklch": {
    "l": 0.2572,
    "c": 0.08349,
    "h": 267.7
  },
  "luminance": 0.01617
}

Semantic roles & 50–950 ramp

primary

#121F4B

secondary

#847235

accent

#C043E4

background

#F5F5F7

surface

#E9E9EE

border

#C5C5C9

text

#04030A

muted

#79787C

Preview Lab

Preview with #121F4B

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

Preview Lab → · Contrast checker → · Palette generator →