#121B5C#121B5C

#121B5C is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.5% C 0.115 H 270.1°. Best body text is #FFFFFF at 15.71:1 contrast (WCAG AA passes).

Color values

HEX	#121B5C
RGB	rgb(18, 27, 92)
HSL	hsl(233, 67%, 22%)
HSV	hsv(233, 80%, 36%)
CMYK	cmyk(80.4%, 70.7%, 0%, 63.9%)
CIE-LAB	lab(13.74, 21.94, -39.89)
CIE-LCH	lch(13.74, 45.53, 298.81°)
OKLab	oklab(26.52% 0.0001 -0.1154)
OKLCH	oklch(26.52% 0.115 270.1)
XYZ	xyz(2.5725, 1.6849, 10.3128)
Luminance	0.0169 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B5C #5C5312

analogous

#12405C #121B5C #2E125C

triadic

#121B5C #5C121B #1B5C12

tetradic

#121B5C #5C1240 #5C5312 #125C2E

square

#121B5C #5C1240 #5C5312 #125C2E

split-complementary

#121B5C #5C2E12 #405C12

monochromatic

#05081A #080C29 #121B5C #1C2A8F #2639C2

Accessibility & contrast

On white

15.71

#121B5C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.34

#121B5C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B5C

15.71:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B5C	#FFFFFF	#000000	##FFFFFF
##121B5C	1.00	15.71	1.34	15.71
#FFFFFF	15.71	1.00	21.00	1.00
#000000	1.34	21.00	1.00	21.00
##FFFFFF	15.71	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275E

Deuteranopia (green-blind)

#00205B

Tritanopia (blue-blind)

#002C38

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #121b5c;
/* rgb */ color: rgb(18, 27, 92);
/* oklch */ color: oklch(26.5% 0.115 270.1);

Tailwind

colors: {
  custom: {
    50: '#5e578b',
    500: '#121b5c',
    950: '#000000',
  },
}

SCSS

$custom: #121b5c;
$custom-light: #5e578b;
$custom-dark: #000000;

JSON

{
  "hex": "#121b5c",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 92
  },
  "hsl": {
    "h": 232.703,
    "s": 67.273,
    "l": 21.569
  },
  "oklch": {
    "l": 0.26515,
    "c": 0.11539,
    "h": 270.1
  },
  "luminance": 0.01685
}

Semantic roles & 50–950 ramp

primary

#121B5C

secondary

#948935

accent

#D53EEA

background

#F5F5F8

surface

#EAE9F0

border

#C6C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #121B5C

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

Preview Lab → · Contrast checker → · Palette generator →