#121F5A#121F5A

#121F5A is a dark, moderate blue. Relative luminance 0.018; OKLCH L 27.1% C 0.107 H 268.6°. Best body text is #FFFFFF at 15.34:1 contrast (WCAG AA passes).

Color values

HEX	#121F5A
RGB	rgb(18, 31, 90)
HSL	hsl(229, 67%, 21%)
HSV	hsv(229, 80%, 35%)
CMYK	cmyk(80%, 65.6%, 0%, 64.7%)
CIE-LAB	lab(14.66, 18.19, -37.04)
CIE-LCH	lch(14.66, 41.27, 296.16°)
OKLab	oklab(27.13% -0.0027 -0.107)
OKLCH	oklch(27.13% 0.107 268.6)
XYZ	xyz(2.5843, 1.8465, 9.8911)
Luminance	0.0185 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F5A #5A4D12

analogous

#12435A #121F5A #29125A

triadic

#121F5A #5A121F #1F5A12

tetradic

#121F5A #5A1243 #5A4D12 #125A29

square

#121F5A #5A1243 #5A4D12 #125A29

split-complementary

#121F5A #5A2912 #435A12

monochromatic

#05091A #080D27 #121F5A #1C318D #2642C0

Accessibility & contrast

On white

15.34

#121F5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#121F5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F5A

15.34:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F5A	#FFFFFF	#000000	##FFFFFF
##121F5A	1.00	15.34	1.37	15.34
#FFFFFF	15.34	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.34	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00285C

Deuteranopia (green-blind)

#002259

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #121f5a;
/* rgb */ color: rgb(18, 31, 90);
/* oklch */ color: oklch(27.1% 0.107 268.6);

Tailwind

colors: {
  custom: {
    50: '#5d5a89',
    500: '#121f5a',
    950: '#000000',
  },
}

SCSS

$custom: #121f5a;
$custom-light: #5d5a89;
$custom-dark: #000000;

JSON

{
  "hex": "#121f5a",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 90
  },
  "hsl": {
    "h": 229.167,
    "s": 66.667,
    "l": 21.176
  },
  "oklch": {
    "l": 0.27133,
    "c": 0.10703,
    "h": 268.6
  },
  "luminance": 0.01847
}

Semantic roles & 50–950 ramp

primary

#121F5A

secondary

#938235

accent

#CB3EEA

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #121F5A

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

Preview Lab → · Contrast checker → · Palette generator →