#2128A4#2128A4

#2128A4 is a dark, vivid blue. Relative luminance 0.045; OKLCH L 37.4% C 0.193 H 270.2°. Best body text is #FFFFFF at 11.03:1 contrast (WCAG AA passes).

Color values

HEX	#2128A4
RGB	rgb(33, 40, 164)
HSL	hsl(237, 66%, 39%)
HSV	hsv(237, 80%, 64%)
CMYK	cmyk(79.9%, 75.6%, 0%, 35.7%)
CIE-LAB	lab(25.32, 41.78, -66.49)
CIE-LCH	lch(25.32, 78.52, 302.14°)
OKLab	oklab(37.38% 0.0005 -0.1926)
OKLCH	oklch(37.38% 0.193 270.2)
XYZ	xyz(8.0845, 4.5203, 35.5612)
Luminance	0.0452 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2128A4 #A49D21

analogous

#2169A4 #2128A4 #5B21A4

triadic

#2128A4 #A42128 #28A421

tetradic

#2128A4 #A42169 #A49D21 #21A45B

square

#2128A4 #A42169 #A49D21 #21A45B

split-complementary

#2128A4 #A45B21 #69A421

monochromatic

#0C0F3E #171C71 #2128A4 #2D36D5 #6067DF

Accessibility & contrast

On white

11.03

#2128A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.90

#2128A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2128A4

11.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2128A4	#FFFFFF	#000000	##FFFFFF
##2128A4	1.00	11.03	1.90	11.03
#FFFFFF	11.03	1.00	21.00	1.00
#000000	1.90	21.00	1.00	21.00
##FFFFFF	11.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0042A8

Deuteranopia (green-blind)

#0035A2

Tritanopia (blue-blind)

#004D64

Achromatopsia (no color)

#3C3C3C

Design tokens & code

CSS

--color: #2128a4;
/* rgb */ color: rgb(33, 40, 164);
/* oklch */ color: oklch(37.4% 0.193 270.2);

Tailwind

colors: {
  custom: {
    50: '#7563c0',
    500: '#2128a4',
    950: '#000000',
  },
}

SCSS

$custom: #2128a4;
$custom-light: #7563c0;
$custom-dark: #000000;

JSON

{
  "hex": "#2128a4",
  "rgb": {
    "r": 33,
    "g": 40,
    "b": 164
  },
  "hsl": {
    "h": 236.794,
    "s": 66.497,
    "l": 38.627
  },
  "oklch": {
    "l": 0.37381,
    "c": 0.19258,
    "h": 270.2
  },
  "luminance": 0.04521
}

Semantic roles & 50–950 ramp

primary

#2128A4

secondary

#C4BE5D

accent

#E03EE9

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0512

muted

#7C7A81

Preview Lab

Preview with #2128A4

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

Preview Lab → · Contrast checker → · Palette generator →