#557BB4#557BB4

#557BB4 is a mid, moderate blue. Relative luminance 0.194; OKLCH L 58.0% C 0.098 H 258.3°. Best body text is #000000 at 4.88:1 contrast (WCAG AA passes).

Color values

HEX	#557BB4
RGB	rgb(85, 123, 180)
HSL	hsl(216, 39%, 52%)
HSV	hsv(216, 53%, 71%)
CMYK	cmyk(52.8%, 31.7%, 0%, 29.4%)
CIE-LAB	lab(51.14, 3.28, -34.21)
CIE-LCH	lch(51.14, 34.37, 275.48°)
OKLab	oklab(57.96% -0.02 -0.0962)
OKLCH	oklch(57.96% 0.098 258.3)
XYZ	xyz(19.0647, 19.3911, 45.9094)
Luminance	0.1939 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BB4 #B48E55

analogous

#55ABB4 #557BB4 #5F55B4

triadic

#557BB4 #B4557B #7BB455

tetradic

#557BB4 #B455AB #B48E55 #55B45F

square

#557BB4 #B455AB #B48E55 #55B45F

split-complementary

#557BB4 #B45F55 #ABB455

monochromatic

#2C4263 #3E5E8D #557BB4 #7F9CC7 #AABDD9

Accessibility & contrast

On white

4.30

#557BB4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.88

#557BB4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BB4

4.88:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BB4	#FFFFFF	#000000	##000000
##557BB4	1.00	4.30	4.88	4.88
#FFFFFF	4.30	1.00	21.00	21.00
#000000	4.88	21.00	1.00	1.00
##000000	4.88	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#657FB6

Deuteranopia (green-blind)

#5976B3

Tritanopia (blue-blind)

#24888F

Achromatopsia (no color)

#7A7A7A

Design tokens & code

CSS

--color: #557bb4;
/* rgb */ color: rgb(85, 123, 180);
/* oklch */ color: oklch(58.0% 0.098 258.3);

Tailwind

colors: {
  custom: {
    50: '#8ba0ca',
    500: '#557bb4',
    950: '#000000',
  },
}

SCSS

$custom: #557bb4;
$custom-light: #8ba0ca;
$custom-dark: #000000;

JSON

{
  "hex": "#557bb4",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 180
  },
  "hsl": {
    "h": 216,
    "s": 38.776,
    "l": 51.961
  },
  "oklch": {
    "l": 0.57955,
    "c": 0.0983,
    "h": 258.3
  },
  "luminance": 0.19393
}

Semantic roles & 50–950 ramp

primary

#557BB4

secondary

#C7B79E

accent

#A059CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0E13

muted

#7D7E82

Preview Lab

Preview with #557BB4

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

Preview Lab → · Contrast checker → · Palette generator →