#2557B2#2557B2

#2557B2 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.6% C 0.155 H 261.2°. Best body text is #FFFFFF at 6.81:1 contrast (WCAG AA passes).

Color values

HEX	#2557B2
RGB	rgb(37, 87, 178)
HSL	hsl(219, 66%, 42%)
HSV	hsv(219, 79%, 70%)
CMYK	cmyk(79.2%, 51.1%, 0%, 30.2%)
CIE-LAB	lab(38.59, 16.94, -53.16)
CIE-LCH	lch(38.59, 55.79, 287.68°)
OKLab	oklab(47.63% -0.0238 -0.153)
OKLCH	oklch(47.63% 0.155 261.2)
XYZ	xyz(12.2041, 10.4226, 43.4794)
Luminance	0.1042 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2557B2 #B28025

analogous

#259EB2 #2557B2 #3925B2

triadic

#2557B2 #B22557 #57B225

tetradic

#2557B2 #B2259E #B28025 #25B239

square

#2557B2 #B2259E #B28025 #25B239

split-complementary

#2557B2 #B23925 #9EB225

monochromatic

#10254D #1A3E7F #2557B2 #3D74D7 #7098E1

Accessibility & contrast

On white

6.81

#2557B2 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#2557B2 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2557B2

6.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2557B2	#FFFFFF	#000000	##FFFFFF
##2557B2	1.00	6.81	3.08	6.81
#FFFFFF	6.81	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1C62B5

Deuteranopia (green-blind)

#0055B0

Tritanopia (blue-blind)

#006D7C

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #2557b2;
/* rgb */ color: rgb(37, 87, 178);
/* oklch */ color: oklch(47.6% 0.155 261.2);

Tailwind

colors: {
  custom: {
    50: '#7685ca',
    500: '#2557b2',
    950: '#000000',
  },
}

SCSS

$custom: #2557b2;
$custom-light: #7685ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2557b2",
  "rgb": {
    "r": 37,
    "g": 87,
    "b": 178
  },
  "hsl": {
    "h": 218.723,
    "s": 65.581,
    "l": 42.157
  },
  "oklch": {
    "l": 0.47627,
    "c": 0.15486,
    "h": 261.2
  },
  "luminance": 0.10424
}

Semantic roles & 50–950 ramp

primary

#2557B2

secondary

#C8A76B

accent

#AD3FE9

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #2557B2

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

Preview Lab → · Contrast checker → · Palette generator →