#2128A8#2128A8

#2128A8 is a dark, vivid blue. Relative luminance 0.047; OKLCH L 37.8% C 0.197 H 270.0°. Best body text is #FFFFFF at 10.86:1 contrast (WCAG AA passes).

Color values

HEX	#2128A8
RGB	rgb(33, 40, 168)
HSL	hsl(237, 67%, 39%)
HSV	hsv(237, 80%, 66%)
CMYK	cmyk(80.4%, 76.2%, 0%, 34.1%)
CIE-LAB	lab(25.76, 43.15, -68.18)
CIE-LCH	lch(25.76, 80.68, 302.33°)
OKLab	oklab(37.82% -0.0001 -0.1975)
OKLCH	oklch(37.82% 0.197 270)
XYZ	xyz(8.4515, 4.6671, 37.4936)
Luminance	0.0467 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2128A8 #A8A121

analogous

#216CA8 #2128A8 #5E21A8

triadic

#2128A8 #A82128 #28A821

tetradic

#2128A8 #A8216C #A8A121 #21A85E

square

#2128A8 #A8216C #A8A121 #21A85E

split-complementary

#2128A8 #A85E21 #6CA821

monochromatic

#0D1042 #171C75 #2128A8 #3039D6 #636AE0

Accessibility & contrast

On white

10.86

#2128A8 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.93

#2128A8 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2128A8

10.86:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2128A8	#FFFFFF	#000000	##FFFFFF
##2128A8	1.00	10.86	1.93	10.86
#FFFFFF	10.86	1.00	21.00	1.00
#000000	1.93	21.00	1.00	21.00
##FFFFFF	10.86	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0044AC

Deuteranopia (green-blind)

#0036A6

Tritanopia (blue-blind)

#004E66

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #2128a8;
/* rgb */ color: rgb(33, 40, 168);
/* oklch */ color: oklch(37.8% 0.197 270.0);

Tailwind

colors: {
  custom: {
    50: '#7664c3',
    500: '#2128a8',
    950: '#000000',
  },
}

SCSS

$custom: #2128a8;
$custom-light: #7664c3;
$custom-dark: #000000;

JSON

{
  "hex": "#2128a8",
  "rgb": {
    "r": 33,
    "g": 40,
    "b": 168
  },
  "hsl": {
    "h": 236.889,
    "s": 67.164,
    "l": 39.412
  },
  "oklch": {
    "l": 0.37825,
    "c": 0.19748,
    "h": 270
  },
  "luminance": 0.04668
}

Semantic roles & 50–950 ramp

primary

#2128A8

secondary

#C5C05F

accent

#E13EEA

background

#F7F6FC

surface

#EEEBF8

border

#C9C6D1

text

#0A0513

muted

#7C7A82

Preview Lab

Preview with #2128A8

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

Preview Lab → · Contrast checker → · Palette generator →