#121B51#121B51

#121B51 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.4% C 0.099 H 270.4°. Best body text is #FFFFFF at 16.14:1 contrast (WCAG AA passes).

Color values

HEX	#121B51
RGB	rgb(18, 27, 81)
HSL	hsl(231, 64%, 19%)
HSV	hsv(231, 78%, 32%)
CMYK	cmyk(77.8%, 66.7%, 0%, 68.2%)
CIE-LAB	lab(12.65, 17.40, -34.24)
CIE-LCH	lch(12.65, 38.41, 296.94°)
OKLab	oklab(25.38% 0.0007 -0.0988)
OKLCH	oklch(25.38% 0.099 270.4)
XYZ	xyz(2.1261, 1.5063, 7.9617)
Luminance	0.0151 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Midnight Blue (survey)

#020035

ΔE00 6.46

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121B51 #514812

analogous

#123B51 #121B51 #291251

triadic

#121B51 #51121B #1B5112

tetradic

#121B51 #51123B #514812 #125129

square

#121B51 #51123B #514812 #125129

split-complementary

#121B51 #512912 #3B5112

monochromatic

#060819 #070A1F #121B51 #1D2C83 #283CB5

Accessibility & contrast

On white

16.14

#121B51 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#121B51 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121B51

16.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121B51	#FFFFFF	#000000	##FFFFFF
##121B51	1.00	16.14	1.30	16.14
#FFFFFF	16.14	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.14	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#002453

Deuteranopia (green-blind)

#001E50

Tritanopia (blue-blind)

#002933

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #121b51;
/* rgb */ color: rgb(18, 27, 81);
/* oklch */ color: oklch(25.4% 0.099 270.4);

Tailwind

colors: {
  custom: {
    50: '#5a5782',
    500: '#121b51',
    950: '#000000',
  },
}

SCSS

$custom: #121b51;
$custom-light: #5a5782;
$custom-dark: #000000;

JSON

{
  "hex": "#121b51",
  "rgb": {
    "r": 18,
    "g": 27,
    "b": 81
  },
  "hsl": {
    "h": 231.429,
    "s": 63.636,
    "l": 19.412
  },
  "oklch": {
    "l": 0.25378,
    "c": 0.09883,
    "h": 270.4
  },
  "luminance": 0.01507
}

Semantic roles & 50–950 ramp

primary

#121B51

secondary

#8A7E35

accent

#CF41E7

background

#F5F5F8

surface

#E9E9EF

border

#C5C5CA

text

#04030A

muted

#79787C

Preview Lab

Preview with #121B51

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

Preview Lab → · Contrast checker → · Palette generator →