#121858#121858

#121858 is a dark, moderate blue. Relative luminance 0.015; OKLCH L 25.5% C 0.113 H 271.3°. Best body text is #FFFFFF at 16.19:1 contrast (WCAG AA passes).

Color values

HEX	#121858
RGB	rgb(18, 24, 88)
HSL	hsl(235, 66%, 21%)
HSV	hsv(235, 80%, 35%)
CMYK	cmyk(79.5%, 72.7%, 0%, 65.5%)
CIE-LAB	lab(12.52, 22.46, -39.20)
CIE-LCH	lch(12.52, 45.18, 299.81°)
OKLab	oklab(25.5% 0.0025 -0.1134)
OKLCH	oklch(25.5% 0.113 271.3)
XYZ	xyz(2.3369, 1.4862, 9.3943)
Luminance	0.0149 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#121858 #585212

analogous

#123B58 #121858 #2F1258

triadic

#121858 #581218 #185812

tetradic

#121858 #58123B #585212 #12582F

square

#121858 #58123B #585212 #12582F

split-complementary

#121858 #582F12 #3B5812

monochromatic

#050719 #080A25 #121858 #1C268B #2734BE

Accessibility & contrast

On white

16.19

#121858 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.30

#121858 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #121858

16.19:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##121858	#FFFFFF	#000000	##FFFFFF
##121858	1.00	16.19	1.30	16.19
#FFFFFF	16.19	1.00	21.00	1.00
#000000	1.30	21.00	1.00	21.00
##FFFFFF	16.19	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#00245A

Deuteranopia (green-blind)

#001D57

Tritanopia (blue-blind)

#002935

Achromatopsia (no color)

#212121

Design tokens & code

CSS

--color: #121858;
/* rgb */ color: rgb(18, 24, 88);
/* oklch */ color: oklch(25.5% 0.113 271.3);

Tailwind

colors: {
  custom: {
    50: '#5d5588',
    500: '#121858',
    950: '#000000',
  },
}

SCSS

$custom: #121858;
$custom-light: #5d5588;
$custom-dark: #000000;

JSON

{
  "hex": "#121858",
  "rgb": {
    "r": 18,
    "g": 24,
    "b": 88
  },
  "hsl": {
    "h": 234.857,
    "s": 66.038,
    "l": 20.784
  },
  "oklch": {
    "l": 0.255,
    "c": 0.11342,
    "h": 271.3
  },
  "luminance": 0.01486
}

Semantic roles & 50–950 ramp

primary

#121858

secondary

#918935

accent

#DA3FE9

background

#F5F4F8

surface

#E9E7F0

border

#C5C3CB

text

#05030B

muted

#79787C

Preview Lab

Preview with #121858

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

Preview Lab → · Contrast checker → · Palette generator →