#121B5B#121B5B

#121B5B is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.4% C 0.114 H 270.1°. Best body text is #FFFFFF at 15.75:1 contrast (WCAG AA passes).

Color values

HEX	#121B5B
RGB	rgb(18, 27, 91)
HSL	hsl(233, 67%, 21%)
HSV	hsv(233, 80%, 36%)
CMYK	cmyk(80.2%, 70.3%, 0%, 64.3%)
CIE-LAB	lab(13.64, 21.53, -39.39)
CIE-LCH	lch(13.64, 44.89, 298.66°)
OKLab	oklab(26.41% 0.0002 -0.1139)
OKLCH	oklch(26.41% 0.114 270.1)
XYZ	xyz(2.5291, 1.6675, 10.0841)
Luminance	0.0167 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B5B #5B5212

analogous

#12405B #121B5B #2E125B

triadic

#121B5B #5B121B #1B5B12

tetradic

#121B5B #5B1240 #5B5212 #125B2E

square

#121B5B #5B1240 #5B5212 #125B2E

split-complementary

#121B5B #5B2E12 #405B12

monochromatic

#05081A #080C28 #121B5B #1C2A8E #2639C1

Accessibility & contrast

On white

15.75

#121B5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#121B5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B5B

15.75:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B5B	#FFFFFF	#000000	##FFFFFF
##121B5B	1.00	15.75	1.33	15.75
#FFFFFF	15.75	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.75	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265D

Deuteranopia (green-blind)

#001F5A

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #121b5b;
/* rgb */ color: rgb(18, 27, 91);
/* oklch */ color: oklch(26.4% 0.114 270.1);

Tailwind

colors: {
  custom: {
    50: '#5d578a',
    500: '#121b5b',
    950: '#000000',
  },
}

SCSS

$custom: #121b5b;
$custom-light: #5d578a;
$custom-dark: #000000;

JSON

{
  "hex": "#121b5b",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 91
  },
  "hsl": {
    "h": 232.603,
    "s": 66.972,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26409,
    "c": 0.11392,
    "h": 270.1
  },
  "luminance": 0.01668
}

Semantic roles & 50–950 ramp

primary

#121B5B

secondary

#938835

accent

#D53EEA

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #121B5B

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

Preview Lab → · Contrast checker → · Palette generator →