#557BB1#557BB1

#557BB1 is a mid, moderate blue. Relative luminance 0.193; OKLCH L 57.8% C 0.094 H 257.2°. Best body text is #000000 at 4.85:1 contrast (WCAG AA passes).

Color values

HEX	#557BB1
RGB	rgb(85, 123, 177)
HSL	hsl(215, 37%, 51%)
HSV	hsv(215, 52%, 69%)
CMYK	cmyk(52%, 30.5%, 0%, 30.6%)
CIE-LAB	lab(51.00, 2.33, -32.70)
CIE-LCH	lch(51.00, 32.78, 274.07°)
OKLab	oklab(57.8% -0.0208 -0.0919)
OKLCH	oklch(57.8% 0.094 257.2)
XYZ	xyz(18.7624, 19.2702, 44.3173)
Luminance	0.1927 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BB1 #B18B55

analogous

#55A9B1 #557BB1 #5D55B1

triadic

#557BB1 #B1557B #7BB155

tetradic

#557BB1 #B155A9 #B18B55 #55B15D

square

#557BB1 #B155A9 #B18B55 #55B15D

split-complementary

#557BB1 #B15D55 #A9B155

monochromatic

#2C4160 #3F5E8A #557BB1 #7F9CC4 #A9BCD7

Accessibility & contrast

On white

4.33

#557BB1 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.85

#557BB1 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BB1

4.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BB1	#FFFFFF	#000000	##000000
##557BB1	1.00	4.33	4.85	4.85
#FFFFFF	4.33	1.00	21.00	21.00
#000000	4.85	21.00	1.00	1.00
##000000	4.85	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#667EB3

Deuteranopia (green-blind)

#5B75B0

Tritanopia (blue-blind)

#27878E

Achromatopsia (no color)

#797979

Design tokens & code

CSS

--color: #557bb1;
/* rgb */ color: rgb(85, 123, 177);
/* oklch */ color: oklch(57.8% 0.094 257.2);

Tailwind

colors: {
  custom: {
    50: '#8aa0c8',
    500: '#557bb1',
    950: '#000000',
  },
}

SCSS

$custom: #557bb1;
$custom-light: #8aa0c8;
$custom-dark: #000000;

JSON

{
  "hex": "#557bb1",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 177
  },
  "hsl": {
    "h": 215.217,
    "s": 37.097,
    "l": 51.373
  },
  "oklch": {
    "l": 0.578,
    "c": 0.09419,
    "h": 257.2
  },
  "luminance": 0.19272
}

Semantic roles & 50–950 ramp

primary

#557BB1

secondary

#C5B49D

accent

#9E5BCD

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557BB1

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

Preview Lab → · Contrast checker → · Palette generator →