#121D5B#121D5B

#121D5B is a dark, moderate blue. Relative luminance 0.018; OKLCH L 26.8% C 0.111 H 269.4°. Best body text is #FFFFFF at 15.53:1 contrast (WCAG AA passes).

Color values

HEX	#121D5B
RGB	rgb(18, 29, 91)
HSL	hsl(231, 67%, 21%)
HSV	hsv(231, 80%, 36%)
CMYK	cmyk(80.2%, 68.1%, 0%, 64.3%)
CIE-LAB	lab(14.19, 20.08, -38.49)
CIE-LCH	lch(14.19, 43.41, 297.55°)
OKLab	oklab(26.81% -0.0012 -0.1113)
OKLCH	oklch(26.81% 0.111 269.4)
XYZ	xyz(2.5765, 1.7624, 10.0999)
Luminance	0.0176 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121D5B #5B5012

analogous

#12425B #121D5B #2C125B

triadic

#121D5B #5B121D #1D5B12

tetradic

#121D5B #5B1242 #5B5012 #125B2C

square

#121D5B #5B1242 #5B5012 #125B2C

split-complementary

#121D5B #5B2C12 #425B12

monochromatic

#05081A #080D28 #121D5B #1C2D8E #263EC1

Accessibility & contrast

On white

15.53

#121D5B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.35

#121D5B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121D5B

15.53:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121D5B	#FFFFFF	#000000	##FFFFFF
##121D5B	1.00	15.53	1.35	15.53
#FFFFFF	15.53	1.00	21.00	1.00
#000000	1.35	21.00	1.00	21.00
##FFFFFF	15.53	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00275D

Deuteranopia (green-blind)

#00215A

Tritanopia (blue-blind)

#002D39

Achromatopsia (no color)

#242424

Design tokens & code

CSS

--color: #121d5b;
/* rgb */ color: rgb(18, 29, 91);
/* oklch */ color: oklch(26.8% 0.111 269.4);

Tailwind

colors: {
  custom: {
    50: '#5d588a',
    500: '#121d5b',
    950: '#000000',
  },
}

SCSS

$custom: #121d5b;
$custom-light: #5d588a;
$custom-dark: #000000;

JSON

{
  "hex": "#121d5b",
  "rgb": {
    "r": 18,
    "g": 29,
    "b": 91
  },
  "hsl": {
    "h": 230.959,
    "s": 66.972,
    "l": 21.373
  },
  "oklch": {
    "l": 0.26814,
    "c": 0.11127,
    "h": 269.4
  },
  "luminance": 0.01763
}

Semantic roles & 50–950 ramp

primary

#121D5B

secondary

#938535

accent

#D03EEA

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030C

muted

#79787D

Preview Lab

Preview with #121D5B

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

Preview Lab → · Contrast checker → · Palette generator →