#557BB7#557BB7

#557BB7 is a mid, moderate blue. Relative luminance 0.195; OKLCH L 58.1% C 0.102 H 259.2°. Best body text is #000000 at 4.90:1 contrast (WCAG AA passes).

Color values

HEX	#557BB7
RGB	rgb(85, 123, 183)
HSL	hsl(217, 40%, 53%)
HSV	hsv(217, 54%, 72%)
CMYK	cmyk(53.6%, 32.8%, 0%, 28.2%)
CIE-LAB	lab(51.28, 4.24, -35.72)
CIE-LCH	lch(51.28, 35.97, 276.77°)
OKLab	oklab(58.11% -0.0191 -0.1006)
OKLCH	oklch(58.11% 0.102 259.2)
XYZ	xyz(19.3736, 19.5146, 47.5364)
Luminance	0.1952 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BB7 #B79155

analogous

#55ACB7 #557BB7 #6055B7

triadic

#557BB7 #B7557B #7BB755

tetradic

#557BB7 #B755AC #B79155 #55B760

square

#557BB7 #B755AC #B79155 #55B760

split-complementary

#557BB7 #B76055 #ACB755

monochromatic

#2B4266 #3E5E91 #557BB7 #809CC9 #ABBEDB

Accessibility & contrast

On white

4.28

#557BB7 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.90

#557BB7 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BB7

4.90:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BB7	#FFFFFF	#000000	##000000
##557BB7	1.00	4.28	4.90	4.90
#FFFFFF	4.28	1.00	21.00	21.00
#000000	4.90	21.00	1.00	1.00
##000000	4.90	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#637FBA

Deuteranopia (green-blind)

#5776B6

Tritanopia (blue-blind)

#208891

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #557bb7;
/* rgb */ color: rgb(85, 123, 183);
/* oklch */ color: oklch(58.1% 0.102 259.2);

Tailwind

colors: {
  custom: {
    50: '#8ba0cd',
    500: '#557bb7',
    950: '#000000',
  },
}

SCSS

$custom: #557bb7;
$custom-light: #8ba0cd;
$custom-dark: #000000;

JSON

{
  "hex": "#557bb7",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 183
  },
  "hsl": {
    "h": 216.735,
    "s": 40.496,
    "l": 52.549
  },
  "oklch": {
    "l": 0.58113,
    "c": 0.10242,
    "h": 259.2
  },
  "luminance": 0.19516
}

Semantic roles & 50–950 ramp

primary

#557BB7

secondary

#C9B99F

accent

#A157D0

background

#F8F9FC

surface

#F0F2F9

border

#CBCCD2

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557BB7

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

Preview Lab → · Contrast checker → · Palette generator →