#121F5B#121F5B

#121F5B is a dark, moderate blue. Relative luminance 0.019; OKLCH L 27.2% C 0.109 H 268.6°. Best body text is #FFFFFF at 15.30:1 contrast (WCAG AA passes).

Color values

HEX	#121F5B
RGB	rgb(18, 31, 91)
HSL	hsl(229, 67%, 21%)
HSV	hsv(229, 80%, 36%)
CMYK	cmyk(80.2%, 65.9%, 0%, 64.3%)
CIE-LAB	lab(14.75, 18.61, -37.56)
CIE-LCH	lch(14.75, 41.92, 296.36°)
OKLab	oklab(27.23% -0.0027 -0.1085)
OKLCH	oklch(27.23% 0.109 268.6)
XYZ	xyz(2.6271, 1.8636, 10.1168)
Luminance	0.0186 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121F5B #5B4E12

analogous

#12445B #121F5B #2A125B

triadic

#121F5B #5B121F #1F5B12

tetradic

#121F5B #5B1244 #5B4E12 #125B2A

square

#121F5B #5B1244 #5B4E12 #125B2A

split-complementary

#121F5B #5B2A12 #445B12

monochromatic

#05091A #080E28 #121F5B #1C308E #2642C1

Accessibility & contrast

On white

15.30

#121F5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.37

#121F5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121F5B

15.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121F5B	#FFFFFF	#000000	##FFFFFF
##121F5B	1.00	15.30	1.37	15.30
#FFFFFF	15.30	1.00	21.00	1.00
#000000	1.37	21.00	1.00	21.00
##FFFFFF	15.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00295D

Deuteranopia (green-blind)

#00225A

Tritanopia (blue-blind)

#002E39

Achromatopsia (no color)

#252525

Design tokens & code

CSS

--color: #121f5b;
/* rgb */ color: rgb(18, 31, 91);
/* oklch */ color: oklch(27.2% 0.109 268.6);

Tailwind

colors: {
  custom: {
    50: '#5d5a8a',
    500: '#121f5b',
    950: '#000000',
  },
}

SCSS

$custom: #121f5b;
$custom-light: #5d5a8a;
$custom-dark: #000000;

JSON

{
  "hex": "#121f5b",
  "rgb": {
    "r": 18,
    "g": 31,
    "b": 91
  },
  "hsl": {
    "h": 229.315,
    "s": 66.972,
    "l": 21.373
  },
  "oklch": {
    "l": 0.27233,
    "c": 0.10855,
    "h": 268.6
  },
  "luminance": 0.01864
}

Semantic roles & 50–950 ramp

primary

#121F5B

secondary

#938335

accent

#CB3EEA

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #121F5B

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

Preview Lab → · Contrast checker → · Palette generator →