#2550B4#2550B4

#2550B4 is a mid, vivid blue. Relative luminance 0.094; OKLCH L 46.3% C 0.166 H 263.6°. Best body text is #FFFFFF at 7.28:1 contrast (WCAG AA passes).

Color values

HEX	#2550B4
RGB	rgb(37, 80, 180)
HSL	hsl(222, 66%, 43%)
HSV	hsv(222, 79%, 71%)
CMYK	cmyk(79.4%, 55.6%, 0%, 29.4%)
CIE-LAB	lab(36.79, 22.36, -57.26)
CIE-LCH	lch(36.79, 61.47, 291.33°)
OKLab	oklab(46.31% -0.0185 -0.1652)
OKLCH	oklch(46.31% 0.166 263.6)
XYZ	xyz(11.8669, 9.4245, 44.3649)
Luminance	0.0943 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2550B4 #B48925

analogous

#2598B4 #2550B4 #4125B4

triadic

#2550B4 #B42550 #50B425

tetradic

#2550B4 #B42598 #B48925 #25B441

square

#2550B4 #B42598 #B48925 #25B441

split-complementary

#2550B4 #B44125 #98B425

monochromatic

#10234E #1B3981 #2550B4 #3F6DD7 #7193E2

Accessibility & contrast

On white

7.28

#2550B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.89

#2550B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2550B4

7.28:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2550B4	#FFFFFF	#000000	##FFFFFF
##2550B4	1.00	7.28	2.89	7.28
#FFFFFF	7.28	1.00	21.00	1.00
#000000	2.89	21.00	1.00	21.00
##FFFFFF	7.28	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#005DB7

Deuteranopia (green-blind)

#0050B2

Tritanopia (blue-blind)

#00697A

Achromatopsia (no color)

#575757

Design tokens & code

CSS

--color: #2550b4;
/* rgb */ color: rgb(37, 80, 180);
/* oklch */ color: oklch(46.3% 0.166 263.6);

Tailwind

colors: {
  custom: {
    50: '#7780cb',
    500: '#2550b4',
    950: '#000000',
  },
}

SCSS

$custom: #2550b4;
$custom-light: #7780cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2550b4",
  "rgb": {
    "r": 37,
    "g": 80,
    "b": 180
  },
  "hsl": {
    "h": 221.958,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.46305,
    "c": 0.16624,
    "h": 263.6
  },
  "luminance": 0.09426
}

Semantic roles & 50–950 ramp

primary

#2550B4

secondary

#C9AD6C

accent

#B63FE9

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2550B4

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

Preview Lab → · Contrast checker → · Palette generator →