#121B5A#121B5A

#121B5A is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.3% C 0.112 H 270.1°. Best body text is #FFFFFF at 15.79:1 contrast (WCAG AA passes).

Color values

HEX	#121B5A
RGB	rgb(18, 27, 90)
HSL	hsl(233, 67%, 21%)
HSV	hsv(233, 80%, 35%)
CMYK	cmyk(80%, 70%, 0%, 64.7%)
CIE-LAB	lab(13.53, 21.12, -38.89)
CIE-LCH	lch(13.53, 44.25, 298.51°)
OKLab	oklab(26.3% 0.0003 -0.1124)
OKLCH	oklch(26.3% 0.112 270.1)
XYZ	xyz(2.4862, 1.6504, 9.8584)
Luminance	0.0165 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B5A #5A5112

analogous

#123F5A #121B5A #2D125A

triadic

#121B5A #5A121B #1B5A12

tetradic

#121B5A #5A123F #5A5112 #125A2D

square

#121B5A #5A123F #5A5112 #125A2D

split-complementary

#121B5A #5A2D12 #3F5A12

monochromatic

#05081A #080C27 #121B5A #1C2A8D #263AC0

Accessibility & contrast

On white

15.79

#121B5A on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#121B5A on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B5A

15.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B5A	#FFFFFF	#000000	##FFFFFF
##121B5A	1.00	15.79	1.33	15.79
#FFFFFF	15.79	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265C

Deuteranopia (green-blind)

#001F59

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #121b5a;
/* rgb */ color: rgb(18, 27, 90);
/* oklch */ color: oklch(26.3% 0.112 270.1);

Tailwind

colors: {
  custom: {
    50: '#5d5789',
    500: '#121b5a',
    950: '#000000',
  },
}

SCSS

$custom: #121b5a;
$custom-light: #5d5789;
$custom-dark: #000000;

JSON

{
  "hex": "#121b5a",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 90
  },
  "hsl": {
    "h": 232.5,
    "s": 66.667,
    "l": 21.176
  },
  "oklch": {
    "l": 0.26303,
    "c": 0.11245,
    "h": 270.1
  },
  "luminance": 0.01651
}

Semantic roles & 50–950 ramp

primary

#121B5A

secondary

#938735

accent

#D43EEA

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #121B5A

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

Preview Lab → · Contrast checker → · Palette generator →