#557BB5#557BB5

#557BB5 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 58.0% C 0.100 H 258.6°. Best body text is #000000 at 4.89:1 contrast (WCAG AA passes).

Color values

HEX	#557BB5
RGB	rgb(85, 123, 181)
HSL	hsl(216, 39%, 52%)
HSV	hsv(216, 53%, 71%)
CMYK	cmyk(53%, 32%, 0%, 29%)
CIE-LAB	lab(51.19, 3.60, -34.71)
CIE-LCH	lch(51.19, 34.90, 275.92°)
OKLab	oklab(58.01% -0.0197 -0.0977)
OKLCH	oklch(58.01% 0.1 258.6)
XYZ	xyz(19.1669, 19.4320, 46.4478)
Luminance	0.1943 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BB5 #B58F55

analogous

#55ABB5 #557BB5 #5F55B5

triadic

#557BB5 #B5557B #7BB555

tetradic

#557BB5 #B555AB #B58F55 #55B55F

square

#557BB5 #B555AB #B58F55 #55B55F

split-complementary

#557BB5 #B55F55 #ABB555

monochromatic

#2C4264 #3E5E8F #557BB5 #809CC8 #AABDDA

Accessibility & contrast

On white

4.30

#557BB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.89

#557BB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BB5

4.89:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BB5	#FFFFFF	#000000	##000000
##557BB5	1.00	4.30	4.89	4.89
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.89	21.00	1.00	1.00
##000000	4.89	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#647FB7

Deuteranopia (green-blind)

#5876B4

Tritanopia (blue-blind)

#228890

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #557bb5;
/* rgb */ color: rgb(85, 123, 181);
/* oklch */ color: oklch(58.0% 0.100 258.6);

Tailwind

colors: {
  custom: {
    50: '#8ba0cb',
    500: '#557bb5',
    950: '#000000',
  },
}

SCSS

$custom: #557bb5;
$custom-light: #8ba0cb;
$custom-dark: #000000;

JSON

{
  "hex": "#557bb5",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 181
  },
  "hsl": {
    "h": 216.25,
    "s": 39.344,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58007,
    "c": 0.09966,
    "h": 258.6
  },
  "luminance": 0.19433
}

Semantic roles & 50–950 ramp

primary

#557BB5

secondary

#C8B79E

accent

#A059CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557BB5

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

Preview Lab → · Contrast checker → · Palette generator →