#2557A4#2557A4

#2557A4 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 46.6% C 0.136 H 259.0°. Best body text is #FFFFFF at 7.05:1 contrast (WCAG AA passes).

Color values

HEX	#2557A4
RGB	rgb(37, 87, 164)
HSL	hsl(216, 63%, 39%)
HSV	hsv(216, 77%, 64%)
CMYK	cmyk(77.4%, 47%, 0%, 35.7%)
CIE-LAB	lab(37.64, 11.48, -46.38)
CIE-LCH	lch(37.64, 47.78, 283.90°)
OKLab	oklab(46.6% -0.0259 -0.1331)
OKLCH	oklch(46.6% 0.136 259)
XYZ	xyz(10.8695, 9.8888, 36.4506)
Luminance	0.0989 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2557A4 #A47225

analogous

#2597A4 #2557A4 #3325A4

triadic

#2557A4 #A42557 #57A425

tetradic

#2557A4 #A42597 #A47225 #25A433

square

#2557A4 #A42597 #A47225 #25A433

split-complementary

#2557A4 #A43325 #97A425

monochromatic

#0E2240 #1A3D72 #2557A4 #3572D1 #6795DD

Accessibility & contrast

On white

7.05

#2557A4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.98

#2557A4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2557A4

7.05:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2557A4	#FFFFFF	#000000	##FFFFFF
##2557A4	1.00	7.05	2.98	7.05
#FFFFFF	7.05	1.00	21.00	1.00
#000000	2.98	21.00	1.00	21.00
##FFFFFF	7.05	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E5FA7

Deuteranopia (green-blind)

#0D53A2

Tritanopia (blue-blind)

#006975

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2557a4;
/* rgb */ color: rgb(37, 87, 164);
/* oklch */ color: oklch(46.6% 0.136 259.0);

Tailwind

colors: {
  custom: {
    50: '#7385bf',
    500: '#2557a4',
    950: '#000000',
  },
}

SCSS

$custom: #2557a4;
$custom-light: #7385bf;
$custom-dark: #000000;

JSON

{
  "hex": "#2557a4",
  "rgb": {
    "r": 37,
    "g": 87,
    "b": 164
  },
  "hsl": {
    "h": 216.378,
    "s": 63.184,
    "l": 39.412
  },
  "oklch": {
    "l": 0.46596,
    "c": 0.13559,
    "h": 259
  },
  "luminance": 0.0989
}

Semantic roles & 50–950 ramp

primary

#2557A4

secondary

#C29D62

accent

#A542E6

background

#F7F8FB

surface

#EDEFF7

border

#C8CAD0

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #2557A4

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

Preview Lab → · Contrast checker → · Palette generator →