#2557A8#2557A8

#2557A8 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 46.9% C 0.141 H 259.7°. Best body text is #FFFFFF at 6.98:1 contrast (WCAG AA passes).

Color values

HEX	#2557A8
RGB	rgb(37, 87, 168)
HSL	hsl(217, 64%, 40%)
HSV	hsv(217, 78%, 66%)
CMYK	cmyk(78%, 48.2%, 0%, 34.1%)
CIE-LAB	lab(37.91, 13.04, -48.34)
CIE-LCH	lch(37.91, 50.07, 285.10°)
OKLab	oklab(46.88% -0.0252 -0.1388)
OKLCH	oklch(46.88% 0.141 259.7)
XYZ	xyz(11.2365, 10.0356, 38.3831)
Luminance	0.1004 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2557A8 #A87625

analogous

#2598A8 #2557A8 #3425A8

triadic

#2557A8 #A82557 #57A825

tetradic

#2557A8 #A82598 #A87625 #25A834

square

#2557A8 #A82598 #A87625 #25A834

split-complementary

#2557A8 #A83425 #98A825

monochromatic

#0F2344 #1A3D76 #2557A8 #3773D3 #6996DE

Accessibility & contrast

On white

6.98

#2557A8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.01

#2557A8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2557A8

6.98:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2557A8	#FFFFFF	#000000	##FFFFFF
##2557A8	1.00	6.98	3.01	6.98
#FFFFFF	6.98	1.00	21.00	1.00
#000000	3.01	21.00	1.00	21.00
##FFFFFF	6.98	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2A60AB

Deuteranopia (green-blind)

#0054A6

Tritanopia (blue-blind)

#006A77

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2557a8;
/* rgb */ color: rgb(37, 87, 168);
/* oklch */ color: oklch(46.9% 0.141 259.7);

Tailwind

colors: {
  custom: {
    50: '#7385c2',
    500: '#2557a8',
    950: '#000000',
  },
}

SCSS

$custom: #2557a8;
$custom-light: #7385c2;
$custom-dark: #000000;

JSON

{
  "hex": "#2557a8",
  "rgb": {
    "r": 37,
    "g": 87,
    "b": 168
  },
  "hsl": {
    "h": 217.099,
    "s": 63.902,
    "l": 40.196
  },
  "oklch": {
    "l": 0.46884,
    "c": 0.14112,
    "h": 259.7
  },
  "luminance": 0.10037
}

Semantic roles & 50–950 ramp

primary

#2557A8

secondary

#C4A065

accent

#A841E7

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #2557A8

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

Preview Lab → · Contrast checker → · Palette generator →