#557BB3#557BB3

#557BB3 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 57.9% C 0.097 H 257.9°. Best body text is #000000 at 4.87:1 contrast (WCAG AA passes).

Color values

HEX	#557BB3
RGB	rgb(85, 123, 179)
HSL	hsl(216, 38%, 52%)
HSV	hsv(216, 53%, 70%)
CMYK	cmyk(52.5%, 31.3%, 0%, 29.8%)
CIE-LAB	lab(51.09, 2.96, -33.71)
CIE-LCH	lch(51.09, 33.84, 275.02°)
OKLab	oklab(57.9% -0.0203 -0.0948)
OKLCH	oklch(57.9% 0.097 257.9)
XYZ	xyz(18.9632, 19.3505, 45.3748)
Luminance	0.1935 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BB3 #B38D55

analogous

#55AAB3 #557BB3 #5E55B3

triadic

#557BB3 #B3557B #7BB355

tetradic

#557BB3 #B355AA #B38D55 #55B35E

square

#557BB3 #B355AA #B38D55 #55B35E

split-complementary

#557BB3 #B35E55 #AAB355

monochromatic

#2C4262 #3F5E8C #557BB3 #7F9CC6 #AABDD9

Accessibility & contrast

On white

4.31

#557BB3 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.87

#557BB3 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BB3

4.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BB3	#FFFFFF	#000000	##000000
##557BB3	1.00	4.31	4.87	4.87
#FFFFFF	4.31	1.00	21.00	21.00
#000000	4.87	21.00	1.00	1.00
##000000	4.87	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657FB5

Deuteranopia (green-blind)

#5A76B2

Tritanopia (blue-blind)

#25878F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #557bb3;
/* rgb */ color: rgb(85, 123, 179);
/* oklch */ color: oklch(57.9% 0.097 257.9);

Tailwind

colors: {
  custom: {
    50: '#8ba0ca',
    500: '#557bb3',
    950: '#000000',
  },
}

SCSS

$custom: #557bb3;
$custom-light: #8ba0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#557bb3",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 179
  },
  "hsl": {
    "h": 215.745,
    "s": 38.211,
    "l": 51.765
  },
  "oklch": {
    "l": 0.57903,
    "c": 0.09693,
    "h": 257.9
  },
  "luminance": 0.19352
}

Semantic roles & 50–950 ramp

primary

#557BB3

secondary

#C7B69D

accent

#9F5ACE

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557BB3

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

Preview Lab → · Contrast checker → · Palette generator →