#2553B4#2553B4

#2553B4 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 46.9% C 0.163 H 262.7°. Best body text is #FFFFFF at 7.06:1 contrast (WCAG AA passes).

Color values

HEX	#2553B4
RGB	rgb(37, 83, 180)
HSL	hsl(221, 66%, 43%)
HSV	hsv(221, 79%, 71%)
CMYK	cmyk(79.4%, 53.9%, 0%, 29.4%)
CIE-LAB	lab(37.61, 20.37, -55.92)
CIE-LCH	lch(37.61, 59.51, 290.02°)
OKLab	oklab(46.93% -0.0206 -0.1612)
OKLCH	oklch(46.93% 0.163 262.7)
XYZ	xyz(12.0915, 9.8737, 44.4397)
Luminance	0.0988 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2553B4 #B48625

analogous

#259BB4 #2553B4 #3E25B4

triadic

#2553B4 #B42553 #53B425

tetradic

#2553B4 #B4259B #B48625 #25B43E

square

#2553B4 #B4259B #B48625 #25B43E

split-complementary

#2553B4 #B43E25 #9BB425

monochromatic

#10244E #1B3C81 #2553B4 #3F70D7 #7196E2

Accessibility & contrast

On white

7.06

#2553B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.97

#2553B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2553B4

7.06:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2553B4	#FFFFFF	#000000	##FFFFFF
##2553B4	1.00	7.06	2.97	7.06
#FFFFFF	7.06	1.00	21.00	1.00
#000000	2.97	21.00	1.00	21.00
##FFFFFF	7.06	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#015FB7

Deuteranopia (green-blind)

#0052B2

Tritanopia (blue-blind)

#006B7B

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2553b4;
/* rgb */ color: rgb(37, 83, 180);
/* oklch */ color: oklch(46.9% 0.163 262.7);

Tailwind

colors: {
  custom: {
    50: '#7682cb',
    500: '#2553b4',
    950: '#000000',
  },
}

SCSS

$custom: #2553b4;
$custom-light: #7682cb;
$custom-dark: #000000;

JSON

{
  "hex": "#2553b4",
  "rgb": {
    "r": 37,
    "g": 83,
    "b": 180
  },
  "hsl": {
    "h": 220.699,
    "s": 65.899,
    "l": 42.549
  },
  "oklch": {
    "l": 0.4693,
    "c": 0.16253,
    "h": 262.7
  },
  "luminance": 0.09875
}

Semantic roles & 50–950 ramp

primary

#2553B4

secondary

#C9AB6C

accent

#B23FE9

background

#F7F7FC

surface

#EEEEF9

border

#C9C9D2

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2553B4

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

Preview Lab → · Contrast checker → · Palette generator →