#557DC9#557DC9

#557DC9 is a mid, vivid blue. Relative luminance 0.208; OKLCH L 59.5% C 0.125 H 262.2°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#557DC9
RGB	rgb(85, 125, 201)
HSL	hsl(219, 52%, 56%)
HSV	hsv(219, 58%, 79%)
CMYK	cmyk(57.7%, 37.8%, 0%, 21.2%)
CIE-LAB	lab(52.75, 8.90, -43.72)
CIE-LCH	lch(52.75, 44.61, 281.50°)
OKLab	oklab(59.54% -0.0169 -0.1239)
OKLCH	oklch(59.54% 0.125 262.2)
XYZ	xyz(21.6189, 20.8138, 58.1252)
Luminance	0.2082 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557DC9 #C9A155

analogous

#55B7C9 #557DC9 #6755C9

triadic

#557DC9 #C9557D #7DC955

tetradic

#557DC9 #C955B7 #C9A155 #55C967

square

#557DC9 #C955B7 #C9A155 #55C967

split-complementary

#557DC9 #C96755 #B7C955

monochromatic

#27457C #365EAB #557DC9 #83A1D8 #B2C4E7

Accessibility & contrast

On white

4.07

#557DC9 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#557DC9 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557DC9

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557DC9	#FFFFFF	#000000	##000000
##557DC9	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5D84CC

Deuteranopia (green-blind)

#4E79C7

Tritanopia (blue-blind)

#008E99

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #557dc9;
/* rgb */ color: rgb(85, 125, 201);
/* oklch */ color: oklch(59.5% 0.125 262.2);

Tailwind

colors: {
  custom: {
    50: '#8ea2da',
    500: '#557dc9',
    950: '#000000',
  },
}

SCSS

$custom: #557dc9;
$custom-light: #8ea2da;
$custom-dark: #000000;

JSON

{
  "hex": "#557dc9",
  "rgb": {
    "r": 85,
    "g": 125,
    "b": 201
  },
  "hsl": {
    "h": 219.31,
    "s": 51.786,
    "l": 56.078
  },
  "oklch": {
    "l": 0.59542,
    "c": 0.12507,
    "h": 262.2
  },
  "luminance": 0.20816
}

Semantic roles & 50–950 ramp

primary

#557DC9

secondary

#D5C4A5

accent

#AA4DDB

background

#F9F9FD

surface

#F1F2FA

border

#CBCCD3

text

#0D0F15

muted

#7E7E83

Preview Lab

Preview with #557DC9

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

Preview Lab → · Contrast checker → · Palette generator →