#121C5B#121C5B

#121C5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.6% C 0.113 H 269.8°. Best body text is #FFFFFF at 15.64:1 contrast (WCAG AA passes).

Color values

HEX	#121C5B
RGB	rgb(18, 28, 91)
HSL	hsl(232, 67%, 21%)
HSV	hsv(232, 80%, 36%)
CMYK	cmyk(80.2%, 69.2%, 0%, 64.3%)
CIE-LAB	lab(13.91, 20.81, -38.94)
CIE-LCH	lch(13.91, 44.15, 298.12°)
OKLab	oklab(26.61% -0.0005 -0.1126)
OKLCH	oklch(26.61% 0.113 269.8)
XYZ	xyz(2.5524, 1.7142, 10.0919)
Luminance	0.0171 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121C5B #5B5112

analogous

#12415B #121C5B #2D125B

triadic

#121C5B #5B121C #1C5B12

tetradic

#121C5B #5B1241 #5B5112 #125B2D

square

#121C5B #5B1241 #5B5112 #125B2D

split-complementary

#121C5B #5B2D12 #415B12

monochromatic

#05081A #080C28 #121C5B #1C2C8E #263BC1

Accessibility & contrast

On white

15.64

#121C5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#121C5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121C5B

15.64:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121C5B	#FFFFFF	#000000	##FFFFFF
##121C5B	1.00	15.64	1.34	15.64
#FFFFFF	15.64	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.64	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00205A

Tritanopia (blue-blind)

#002D38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #121c5b;
/* rgb */ color: rgb(18, 28, 91);
/* oklch */ color: oklch(26.6% 0.113 269.8);

Tailwind

colors: {
  custom: {
    50: '#5d588a',
    500: '#121c5b',
    950: '#000000',
  },
}

SCSS

$custom: #121c5b;
$custom-light: #5d588a;
$custom-dark: #000000;

JSON

{
  "hex": "#121c5b",
  "rgb": {
    "r": 18,
    "g": 28,
    "b": 91
  },
  "hsl": {
    "h": 231.781,
    "s": 66.972,
    "l": 21.373
  },
  "oklch": {
    "l": 0.2661,
    "c": 0.1126,
    "h": 269.8
  },
  "luminance": 0.01714
}

Semantic roles & 50–950 ramp

primary

#121C5B

secondary

#938735

accent

#D23EEA

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #121C5B

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

Preview Lab → · Contrast checker → · Palette generator →