#121C58#121C58

#121C58 is a dark, moderate blue. Relative luminance 0.017; OKLCH L 26.3% C 0.108 H 269.8°. Best body text is #FFFFFF at 15.76:1 contrast (WCAG AA passes).

Color values

HEX	#121C58
RGB	rgb(18, 28, 88)
HSL	hsl(231, 66%, 21%)
HSV	hsv(231, 80%, 35%)
CMYK	cmyk(79.5%, 68.2%, 0%, 65.5%)
CIE-LAB	lab(13.61, 19.57, -37.41)
CIE-LCH	lch(13.61, 42.22, 297.62°)
OKLab	oklab(26.3% -0.0003 -0.1081)
OKLCH	oklch(26.3% 0.108 269.8)
XYZ	xyz(2.4256, 1.6634, 9.4239)
Luminance	0.0166 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121C58 #584E12

analogous

#123F58 #121C58 #2B1258

triadic

#121C58 #58121C #1C5812

tetradic

#121C58 #58123F #584E12 #12582B

square

#121C58 #58123F #584E12 #12582B

split-complementary

#121C58 #582B12 #3F5812

monochromatic

#050819 #080C25 #121C58 #1C2C8B #273CBE

Accessibility & contrast

On white

15.76

#121C58 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.33

#121C58 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121C58

15.76:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121C58	#FFFFFF	#000000	##FFFFFF
##121C58	1.00	15.76	1.33	15.76
#FFFFFF	15.76	1.00	21.00	1.00
#000000	1.33	21.00	1.00	21.00
##FFFFFF	15.76	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00265A

Deuteranopia (green-blind)

#002057

Tritanopia (blue-blind)

#002C37

Achromatopsia (no color)

#232323

Design tokens & code

CSS

--color: #121c58;
/* rgb */ color: rgb(18, 28, 88);
/* oklch */ color: oklch(26.3% 0.108 269.8);

Tailwind

colors: {
  custom: {
    50: '#5c5888',
    500: '#121c58',
    950: '#000000',
  },
}

SCSS

$custom: #121c58;
$custom-light: #5c5888;
$custom-dark: #000000;

JSON

{
  "hex": "#121c58",
  "rgb": {
    "r": 18,
    "g": 28,
    "b": 88
  },
  "hsl": {
    "h": 231.429,
    "s": 66.038,
    "l": 20.784
  },
  "oklch": {
    "l": 0.26299,
    "c": 0.10812,
    "h": 269.8
  },
  "luminance": 0.01664
}

Semantic roles & 50–950 ramp

primary

#121C58

secondary

#918435

accent

#D13FE9

background

#F5F5F8

surface

#E9E9F0

border

#C5C5CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #121C58

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

Preview Lab → · Contrast checker → · Palette generator →