#2129A8#2129A8

#2129A8 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 38.0% C 0.197 H 269.9°. Best body text is #FFFFFF at 10.78:1 contrast (WCAG AA passes).

Color values

HEX	#2129A8
RGB	rgb(33, 41, 168)
HSL	hsl(236, 67%, 39%)
HSV	hsv(236, 80%, 66%)
CMYK	cmyk(80.4%, 75.6%, 0%, 34.1%)
CIE-LAB	lab(25.97, 42.58, -67.84)
CIE-LCH	lch(25.97, 80.09, 302.11°)
OKLab	oklab(37.97% -0.0005 -0.1965)
OKLCH	oklch(37.97% 0.197 269.9)
XYZ	xyz(8.4856, 4.7354, 37.5050)
Luminance	0.0474 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2129A8 #A8A021

analogous

#216DA8 #2129A8 #5C21A8

triadic

#2129A8 #A82129 #29A821

tetradic

#2129A8 #A8216D #A8A021 #21A85C

square

#2129A8 #A8216D #A8A021 #21A85C

split-complementary

#2129A8 #A85C21 #6DA821

monochromatic

#0D1042 #171D75 #2129A8 #303AD6 #636AE0

Accessibility & contrast

On white

10.78

#2129A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.95

#2129A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2129A8

10.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2129A8	#FFFFFF	#000000	##FFFFFF
##2129A8	1.00	10.78	1.95	10.78
#FFFFFF	10.78	1.00	21.00	1.00
#000000	1.95	21.00	1.00	21.00
##FFFFFF	10.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044AC

Deuteranopia (green-blind)

#0037A6

Tritanopia (blue-blind)

#004F67

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #2129a8;
/* rgb */ color: rgb(33, 41, 168);
/* oklch */ color: oklch(38.0% 0.197 269.9);

Tailwind

colors: {
  custom: {
    50: '#7664c3',
    500: '#2129a8',
    950: '#000000',
  },
}

SCSS

$custom: #2129a8;
$custom-light: #7664c3;
$custom-dark: #000000;

JSON

{
  "hex": "#2129a8",
  "rgb": {
    "r": 33,
    "g": 41,
    "b": 168
  },
  "hsl": {
    "h": 236.444,
    "s": 67.164,
    "l": 39.412
  },
  "oklch": {
    "l": 0.37969,
    "c": 0.19651,
    "h": 269.9
  },
  "luminance": 0.04736
}

Semantic roles & 50–950 ramp

primary

#2129A8

secondary

#C5BF5F

accent

#E03EEA

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0513

muted

#7C7A82

Preview Lab

Preview with #2129A8

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

Preview Lab → · Contrast checker → · Palette generator →