#2557A5#2557A5

#2557A5 is a mid, vivid blue. Relative luminance 0.099; OKLCH L 46.7% C 0.137 H 259.2°. Best body text is #FFFFFF at 7.03:1 contrast (WCAG AA passes).

Color values

HEX	#2557A5
RGB	rgb(37, 87, 165)
HSL	hsl(217, 63%, 40%)
HSV	hsv(217, 78%, 65%)
CMYK	cmyk(77.6%, 47.3%, 0%, 35.3%)
CIE-LAB	lab(37.71, 11.87, -46.88)
CIE-LCH	lch(37.71, 48.35, 284.21°)
OKLab	oklab(46.67% -0.0257 -0.1345)
OKLCH	oklch(46.67% 0.137 259.2)
XYZ	xyz(10.9602, 9.9251, 36.9281)
Luminance	0.0993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2557A5 #A57325

analogous

#2597A5 #2557A5 #3325A5

triadic

#2557A5 #A52557 #57A525

tetradic

#2557A5 #A52597 #A57325 #25A533

square

#2557A5 #A52597 #A57325 #25A533

split-complementary

#2557A5 #A53325 #97A525

monochromatic

#0F2241 #1A3D73 #2557A5 #3572D2 #6795DD

Accessibility & contrast

On white

7.03

#2557A5 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#2557A5 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2557A5

7.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2557A5	#FFFFFF	#000000	##FFFFFF
##2557A5	1.00	7.03	2.99	7.03
#FFFFFF	7.03	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2D5FA8

Deuteranopia (green-blind)

#0A53A3

Tritanopia (blue-blind)

#006A76

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2557a5;
/* rgb */ color: rgb(37, 87, 165);
/* oklch */ color: oklch(46.7% 0.137 259.2);

Tailwind

colors: {
  custom: {
    50: '#7385c0',
    500: '#2557a5',
    950: '#000000',
  },
}

SCSS

$custom: #2557a5;
$custom-light: #7385c0;
$custom-dark: #000000;

JSON

{
  "hex": "#2557a5",
  "rgb": {
    "r": 37,
    "g": 87,
    "b": 165
  },
  "hsl": {
    "h": 216.563,
    "s": 63.366,
    "l": 39.608
  },
  "oklch": {
    "l": 0.46668,
    "c": 0.13698,
    "h": 259.2
  },
  "luminance": 0.09926
}

Semantic roles & 50–950 ramp

primary

#2557A5

secondary

#C39D63

accent

#A641E6

background

#F7F8FB

surface

#EDEFF7

border

#C8CAD0

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #2557A5

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

Preview Lab → · Contrast checker → · Palette generator →