#2133BC#2133BC

#2133BC is a dark, highly saturated blue. Relative luminance 0.063; OKLCH L 41.6% C 0.211 H 268.2°. Best body text is #FFFFFF at 9.27:1 contrast (WCAG AA passes).

Color values

HEX	#2133BC
RGB	rgb(33, 51, 188)
HSL	hsl(233, 70%, 43%)
HSV	hsv(233, 82%, 74%)
CMYK	cmyk(82.4%, 72.9%, 0%, 26.3%)
CIE-LAB	lab(30.21, 43.64, -72.77)
CIE-LCH	lch(30.21, 84.86, 300.95°)
OKLab	oklab(41.63% -0.0066 -0.2109)
OKLCH	oklch(41.63% 0.211 268.2)
XYZ	xyz(10.8850, 6.3205, 48.2135)
Luminance	0.0632 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2133BC #BCAA21

analogous

#2180BC #2133BC #5C21BC

triadic

#2133BC #BC2133 #33BC21

tetradic

#2133BC #BC2180 #BCAA21 #21BC5C

square

#2133BC #BC2180 #BCAA21 #21BC5C

split-complementary

#2133BC #BC5C21 #80BC21

monochromatic

#0F1754 #182588 #2133BC #3D50DD #717FE6

Accessibility & contrast

On white

9.27

#2133BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#2133BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2133BC

9.27:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2133BC	#FFFFFF	#000000	##FFFFFF
##2133BC	1.00	9.27	2.26	9.27
#FFFFFF	9.27	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.27	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004FC0

Deuteranopia (green-blind)

#003FBA

Tritanopia (blue-blind)

#005B74

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #2133bc;
/* rgb */ color: rgb(33, 51, 188);
/* oklch */ color: oklch(41.6% 0.211 268.2);

Tailwind

colors: {
  custom: {
    50: '#7a6cd1',
    500: '#2133bc',
    950: '#000000',
  },
}

SCSS

$custom: #2133bc;
$custom-light: #7a6cd1;
$custom-dark: #000000;

JSON

{
  "hex": "#2133bc",
  "rgb": {
    "r": 33,
    "g": 51,
    "b": 188
  },
  "hsl": {
    "h": 233.032,
    "s": 70.136,
    "l": 43.333
  },
  "oklch": {
    "l": 0.4163,
    "c": 0.21101,
    "h": 268.2
  },
  "luminance": 0.06322
}

Semantic roles & 50–950 ramp

primary

#2133BC

secondary

#CDC26C

accent

#D83BED

background

#F8F6FD

surface

#EFEBFA

border

#CAC6D3

text

#0B0714

muted

#7C7A83

Preview Lab

Preview with #2133BC

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

Preview Lab → · Contrast checker → · Palette generator →