#2166BD#2166BD

#2166BD is a mid, vivid cyan. Relative luminance 0.135; OKLCH L 51.6% C 0.153 H 256.4°. Best body text is #FFFFFF at 5.68:1 contrast (WCAG AA passes).

Color values

HEX	#2166BD
RGB	rgb(33, 102, 189)
HSL	hsl(213, 70%, 44%)
HSV	hsv(213, 83%, 74%)
CMYK	cmyk(82.5%, 46%, 0%, 25.9%)
CIE-LAB	lab(43.50, 11.05, -51.68)
CIE-LCH	lch(43.50, 52.85, 282.07°)
OKLab	oklab(51.61% -0.0359 -0.1484)
OKLCH	oklch(51.61% 0.153 256.4)
XYZ	xyz(14.5605, 13.4984, 49.9723)
Luminance	0.1350 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2166BD #BD7821

analogous

#21B4BD #2166BD #2A21BD

triadic

#2166BD #BD2166 #66BD21

tetradic

#2166BD #BD21B4 #BD7821 #21BD2A

square

#2166BD #BD21B4 #BD7821 #21BD2A

split-complementary

#2166BD #BD2A21 #B4BD21

monochromatic

#0F2E55 #184A89 #2166BD #3E84DD #72A5E6

Accessibility & contrast

On white

5.68

#2166BD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.70

#2166BD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2166BD

5.68:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2166BD	#FFFFFF	#000000	##FFFFFF
##2166BD	1.00	5.68	3.70	5.68
#FFFFFF	5.68	1.00	21.00	1.00
#000000	3.70	21.00	1.00	21.00
##FFFFFF	5.68	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#376EC0

Deuteranopia (green-blind)

#0D60BB

Tritanopia (blue-blind)

#007B88

Achromatopsia (no color)

#676767

Design tokens & code

CSS

--color: #2166bd;
/* rgb */ color: rgb(33, 102, 189);
/* oklch */ color: oklch(51.6% 0.153 256.4);

Tailwind

colors: {
  custom: {
    50: '#7791d1',
    500: '#2166bd',
    950: '#000000',
  },
}

SCSS

$custom: #2166bd;
$custom-light: #7791d1;
$custom-dark: #000000;

JSON

{
  "hex": "#2166bd",
  "rgb": {
    "r": 33,
    "g": 102,
    "b": 189
  },
  "hsl": {
    "h": 213.462,
    "s": 70.27,
    "l": 43.529
  },
  "oklch": {
    "l": 0.51607,
    "c": 0.15268,
    "h": 256.4
  },
  "luminance": 0.135
}

Semantic roles & 50–950 ramp

primary

#2166BD

secondary

#CDA26D

accent

#9E3BED

background

#F7F8FC

surface

#EEF0F9

border

#C9CBD2

text

#0A0C14

muted

#7C7D82

Preview Lab

Preview with #2166BD

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

Preview Lab → · Contrast checker → · Palette generator →