#2151B2#2151B2

#2151B2 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.2% C 0.163 H 262.3°. Best body text is #FFFFFF at 7.28:1 contrast (WCAG AA passes).

Color values

HEX	#2151B2
RGB	rgb(33, 81, 178)
HSL	hsl(220, 69%, 41%)
HSV	hsv(220, 81%, 70%)
CMYK	cmyk(81.5%, 54.5%, 0%, 30.2%)
CIE-LAB	lab(36.78, 20.52, -56.09)
CIE-LCH	lch(36.78, 59.73, 290.10°)
OKLab	oklab(46.22% -0.022 -0.1618)
OKLCH	oklch(46.22% 0.163 262.3)
XYZ	xyz(11.6026, 9.4211, 43.3178)
Luminance	0.0942 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2151B2 #B28221

analogous

#219AB2 #2151B2 #3A21B2

triadic

#2151B2 #B22151 #51B221

tetradic

#2151B2 #B2219A #B28221 #21B23A

square

#2151B2 #B2219A #B28221 #21B23A

split-complementary

#2151B2 #B23A21 #9AB221

monochromatic

#0E224B #173A7E #2151B2 #366CDA #6A92E3

Accessibility & contrast

On white

7.28

#2151B2 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.88

#2151B2 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2151B2

7.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2151B2	#FFFFFF	#000000	##FFFFFF
##2151B2	1.00	7.28	2.88	7.28
#FFFFFF	7.28	1.00	21.00	1.00
#000000	2.88	21.00	1.00	21.00
##FFFFFF	7.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB5

Deuteranopia (green-blind)

#0050B0

Tritanopia (blue-blind)

#006979

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #2151b2;
/* rgb */ color: rgb(33, 81, 178);
/* oklch */ color: oklch(46.2% 0.163 262.3);

Tailwind

colors: {
  custom: {
    50: '#7581ca',
    500: '#2151b2',
    950: '#000000',
  },
}

SCSS

$custom: #2151b2;
$custom-light: #7581ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2151b2",
  "rgb": {
    "r": 33,
    "g": 81,
    "b": 178
  },
  "hsl": {
    "h": 220.138,
    "s": 68.72,
    "l": 41.373
  },
  "oklch": {
    "l": 0.46216,
    "c": 0.16332,
    "h": 262.3
  },
  "luminance": 0.09423
}

Semantic roles & 50–950 ramp

primary

#2151B2

secondary

#C9A866

accent

#B23CEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2151B2

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

Preview Lab → · Contrast checker → · Palette generator →