#2556B1#2556B1

#2556B1 is a mid, vivid blue. Relative luminance 0.102; OKLCH L 47.3% C 0.155 H 261.4°. Best body text is #FFFFFF at 6.90:1 contrast (WCAG AA passes).

Color values

HEX	#2556B1
RGB	rgb(37, 86, 177)
HSL	hsl(219, 65%, 42%)
HSV	hsv(219, 79%, 69%)
CMYK	cmyk(79.1%, 51.4%, 0%, 30.6%)
CIE-LAB	lab(38.24, 17.21, -53.14)
CIE-LCH	lch(38.24, 55.86, 287.95°)
OKLab	oklab(47.34% -0.0231 -0.153)
OKLCH	oklch(47.34% 0.155 261.4)
XYZ	xyz(12.0237, 10.2218, 42.9258)
Luminance	0.1022 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2556B1 #B18025

analogous

#259CB1 #2556B1 #3A25B1

triadic

#2556B1 #B12556 #56B125

tetradic

#2556B1 #B1259C #B18025 #25B13A

square

#2556B1 #B1259C #B18025 #25B13A

split-complementary

#2556B1 #B13A25 #9CB125

monochromatic

#10254C #1A3D7E #2556B1 #3D73D6 #6F97E1

Accessibility & contrast

On white

6.90

#2556B1 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.04

#2556B1 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2556B1

6.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2556B1	#FFFFFF	#000000	##FFFFFF
##2556B1	1.00	6.90	3.04	6.90
#FFFFFF	6.90	1.00	21.00	1.00
#000000	3.04	21.00	1.00	21.00
##FFFFFF	6.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1B61B4

Deuteranopia (green-blind)

#0054AF

Tritanopia (blue-blind)

#006C7B

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #2556b1;
/* rgb */ color: rgb(37, 86, 177);
/* oklch */ color: oklch(47.3% 0.155 261.4);

Tailwind

colors: {
  custom: {
    50: '#7685c9',
    500: '#2556b1',
    950: '#000000',
  },
}

SCSS

$custom: #2556b1;
$custom-light: #7685c9;
$custom-dark: #000000;

JSON

{
  "hex": "#2556b1",
  "rgb": {
    "r": 37,
    "g": 86,
    "b": 177
  },
  "hsl": {
    "h": 219,
    "s": 65.421,
    "l": 41.961
  },
  "oklch": {
    "l": 0.47335,
    "c": 0.15473,
    "h": 261.4
  },
  "luminance": 0.10223
}

Semantic roles & 50–950 ramp

primary

#2556B1

secondary

#C8A76A

accent

#AD3FE8

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0A13

muted

#7C7C82

Preview Lab

Preview with #2556B1

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

Preview Lab → · Contrast checker → · Palette generator →