#2557A6#2557A6

#2557A6 is a mid, vivid blue. Relative luminance 0.100; OKLCH L 46.7% C 0.138 H 259.4°. Best body text is #FFFFFF at 7.02:1 contrast (WCAG AA passes).

Color values

HEX	#2557A6
RGB	rgb(37, 87, 166)
HSL	hsl(217, 64%, 40%)
HSV	hsv(217, 78%, 65%)
CMYK	cmyk(77.7%, 47.6%, 0%, 34.9%)
CIE-LAB	lab(37.77, 12.26, -47.37)
CIE-LCH	lch(37.77, 48.93, 284.51°)
OKLab	oklab(46.74% -0.0256 -0.136)
OKLCH	oklch(46.74% 0.138 259.4)
XYZ	xyz(11.0516, 9.9616, 37.4093)
Luminance	0.0996 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2557A6 #A67425

analogous

#2598A6 #2557A6 #3325A6

triadic

#2557A6 #A62557 #57A625

tetradic

#2557A6 #A62598 #A67425 #25A633

square

#2557A6 #A62598 #A67425 #25A633

split-complementary

#2557A6 #A63325 #98A625

monochromatic

#0F2342 #1A3D74 #2557A6 #3673D2 #6896DD

Accessibility & contrast

On white

7.02

#2557A6 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.99

#2557A6 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2557A6

7.02:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2557A6	#FFFFFF	#000000	##FFFFFF
##2557A6	1.00	7.02	2.99	7.02
#FFFFFF	7.02	1.00	21.00	1.00
#000000	2.99	21.00	1.00	21.00
##FFFFFF	7.02	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C5FA9

Deuteranopia (green-blind)

#0653A4

Tritanopia (blue-blind)

#006A76

Achromatopsia (no color)

#595959

Design tokens & code

CSS

--color: #2557a6;
/* rgb */ color: rgb(37, 87, 166);
/* oklch */ color: oklch(46.7% 0.138 259.4);

Tailwind

colors: {
  custom: {
    50: '#7385c1',
    500: '#2557a6',
    950: '#000000',
  },
}

SCSS

$custom: #2557a6;
$custom-light: #7385c1;
$custom-dark: #000000;

JSON

{
  "hex": "#2557a6",
  "rgb": {
    "r": 37,
    "g": 87,
    "b": 166
  },
  "hsl": {
    "h": 216.744,
    "s": 63.547,
    "l": 39.804
  },
  "oklch": {
    "l": 0.4674,
    "c": 0.13836,
    "h": 259.4
  },
  "luminance": 0.09963
}

Semantic roles & 50–950 ramp

primary

#2557A6

secondary

#C39E64

accent

#A641E7

background

#F7F8FB

surface

#EEEFF7

border

#C9CAD0

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #2557A6

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

Preview Lab → · Contrast checker → · Palette generator →