#2151AD#2151AD

#2151AD is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.8% C 0.157 H 261.7°. Best body text is #FFFFFF at 7.38:1 contrast (WCAG AA passes).

Color values

HEX	#2151AD
RGB	rgb(33, 81, 173)
HSL	hsl(219, 68%, 40%)
HSV	hsv(219, 81%, 68%)
CMYK	cmyk(80.9%, 53.2%, 0%, 32.2%)
CIE-LAB	lab(36.41, 18.56, -53.73)
CIE-LCH	lch(36.41, 56.84, 289.05°)
OKLab	oklab(45.82% -0.0225 -0.1549)
OKLCH	oklch(45.82% 0.157 261.7)
XYZ	xyz(11.1097, 9.2240, 40.7219)
Luminance	0.0922 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151AD #AD7D21

analogous

#2197AD #2151AD #3721AD

triadic

#2151AD #AD2151 #51AD21

tetradic

#2151AD #AD2197 #AD7D21 #21AD37

square

#2151AD #AD2197 #AD7D21 #21AD37

split-complementary

#2151AD #AD3721 #97AD21

monochromatic

#0D2146 #17397A #2151AD #336CD8 #6691E2

Accessibility & contrast

On white

7.38

#2151AD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.85

#2151AD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2151AD

7.38:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151AD	#FFFFFF	#000000	##FFFFFF
##2151AD	1.00	7.38	2.85	7.38
#FFFFFF	7.38	1.00	21.00	1.00
#000000	2.85	21.00	1.00	21.00
##FFFFFF	7.38	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0B5CB0

Deuteranopia (green-blind)

#0050AB

Tritanopia (blue-blind)

#006877

Achromatopsia (no color)

#565656

Design tokens & code

CSS

--color: #2151ad;
/* rgb */ color: rgb(33, 81, 173);
/* oklch */ color: oklch(45.8% 0.157 261.7);

Tailwind

colors: {
  custom: {
    50: '#7481c6',
    500: '#2151ad',
    950: '#000000',
  },
}

SCSS

$custom: #2151ad;
$custom-light: #7481c6;
$custom-dark: #000000;

JSON

{
  "hex": "#2151ad",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 173
  },
  "hsl": {
    "h": 219.429,
    "s": 67.961,
    "l": 40.392
  },
  "oklch": {
    "l": 0.45817,
    "c": 0.15652,
    "h": 261.7
  },
  "luminance": 0.09225
}

Semantic roles & 50–950 ramp

primary

#2151AD

secondary

#C7A562

accent

#AF3DEB

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2151AD

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

Preview Lab → · Contrast checker → · Palette generator →