#2557AD#2557AD

#2557AD is a mid, vivid blue. Relative luminance 0.102; OKLCH L 47.3% C 0.148 H 260.5°. Best body text is #FFFFFF at 6.90:1 contrast (WCAG AA passes).

Color values

HEX	#2557AD
RGB	rgb(37, 87, 173)
HSL	hsl(218, 65%, 41%)
HSV	hsv(218, 79%, 68%)
CMYK	cmyk(78.6%, 49.7%, 0%, 32.2%)
CIE-LAB	lab(38.24, 14.99, -50.76)
CIE-LCH	lch(38.24, 52.93, 286.46°)
OKLab	oklab(47.25% -0.0245 -0.146)
OKLCH	oklch(47.25% 0.148 260.5)
XYZ	xyz(11.7112, 10.2255, 40.8835)
Luminance	0.1023 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2557AD #AD7B25

analogous

#259BAD #2557AD #3725AD

triadic

#2557AD #AD2557 #57AD25

tetradic

#2557AD #AD259B #AD7B25 #25AD37

square

#2557AD #AD259B #AD7B25 #25AD37

split-complementary

#2557AD #AD3725 #9BAD25

monochromatic

#0F2448 #1A3E7B #2557AD #3A73D5 #6D97E0

Accessibility & contrast

On white

6.90

#2557AD on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.05

#2557AD on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2557AD

6.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2557AD	#FFFFFF	#000000	##FFFFFF
##2557AD	1.00	6.90	3.05	6.90
#FFFFFF	6.90	1.00	21.00	1.00
#000000	3.05	21.00	1.00	21.00
##FFFFFF	6.90	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2461B0

Deuteranopia (green-blind)

#0054AB

Tritanopia (blue-blind)

#006C7A

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #2557ad;
/* rgb */ color: rgb(37, 87, 173);
/* oklch */ color: oklch(47.3% 0.148 260.5);

Tailwind

colors: {
  custom: {
    50: '#7585c6',
    500: '#2557ad',
    950: '#000000',
  },
}

SCSS

$custom: #2557ad;
$custom-light: #7585c6;
$custom-dark: #000000;

JSON

{
  "hex": "#2557ad",
  "rgb": {
    "r": 37,
    "g": 87,
    "b": 173
  },
  "hsl": {
    "h": 217.941,
    "s": 64.762,
    "l": 41.176
  },
  "oklch": {
    "l": 0.47252,
    "c": 0.14802,
    "h": 260.5
  },
  "luminance": 0.10227
}

Semantic roles & 50–950 ramp

primary

#2557AD

secondary

#C6A368

accent

#AA40E8

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #2557AD

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

Preview Lab → · Contrast checker → · Palette generator →