#2137BC#2137BC

#2137BC is a dark, highly saturated blue. Relative luminance 0.067; OKLCH L 42.3% C 0.207 H 267.8°. Best body text is #FFFFFF at 8.98:1 contrast (WCAG AA passes).

Color values

HEX	#2137BC
RGB	rgb(33, 55, 188)
HSL	hsl(231, 70%, 43%)
HSV	hsv(231, 82%, 74%)
CMYK	cmyk(82.4%, 70.7%, 0%, 26.3%)
CIE-LAB	lab(31.08, 41.23, -71.33)
CIE-LCH	lch(31.08, 82.39, 300.03°)
OKLab	oklab(42.26% -0.0081 -0.2067)
OKLCH	oklch(42.26% 0.207 267.8)
XYZ	xyz(11.0673, 6.6852, 48.2743)
Luminance	0.0669 (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

#2137BC #BCA621

analogous

#2184BC #2137BC #5821BC

triadic

#2137BC #BC2137 #37BC21

tetradic

#2137BC #BC2184 #BCA621 #21BC58

square

#2137BC #BC2184 #BCA621 #21BC58

split-complementary

#2137BC #BC5821 #84BC21

monochromatic

#0F1954 #182888 #2137BC #3D54DD #7182E6

Accessibility & contrast

On white

8.98

#2137BC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.34

#2137BC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2137BC

8.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2137BC	#FFFFFF	#000000	##FFFFFF
##2137BC	1.00	8.98	2.34	8.98
#FFFFFF	8.98	1.00	21.00	1.00
#000000	2.34	21.00	1.00	21.00
##FFFFFF	8.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0051C0

Deuteranopia (green-blind)

#0042BA

Tritanopia (blue-blind)

#005D75

Achromatopsia (no color)

#494949

Design tokens & code

CSS

--color: #2137bc;
/* rgb */ color: rgb(33, 55, 188);
/* oklch */ color: oklch(42.3% 0.207 267.8);

Tailwind

colors: {
  custom: {
    50: '#7a6ed1',
    500: '#2137bc',
    950: '#000000',
  },
}

SCSS

$custom: #2137bc;
$custom-light: #7a6ed1;
$custom-dark: #000000;

JSON

{
  "hex": "#2137bc",
  "rgb": {
    "r": 33,
    "g": 55,
    "b": 188
  },
  "hsl": {
    "h": 231.484,
    "s": 70.136,
    "l": 43.333
  },
  "oklch": {
    "l": 0.42257,
    "c": 0.20689,
    "h": 267.8
  },
  "luminance": 0.06687
}

Semantic roles & 50–950 ramp

primary

#2137BC

secondary

#CDBF6C

accent

#D43BED

background

#F8F6FD

surface

#EFECFA

border

#CAC7D3

text

#0B0714

muted

#7C7A83

Preview Lab

Preview with #2137BC

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

Preview Lab → · Contrast checker → · Palette generator →