#557BBF#557BBF

#557BBF is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.5% C 0.113 H 261.4°. Best body text is #000000 at 4.97:1 contrast (WCAG AA passes).

Color values

HEX	#557BBF
RGB	rgb(85, 123, 191)
HSL	hsl(218, 45%, 54%)
HSV	hsv(218, 55%, 75%)
CMYK	cmyk(55.5%, 35.6%, 0%, 25.1%)
CIE-LAB	lab(51.68, 6.83, -39.70)
CIE-LCH	lch(51.68, 40.28, 279.76°)
OKLab	oklab(58.55% -0.017 -0.1122)
OKLCH	oklch(58.55% 0.113 261.4)
XYZ	xyz(20.2300, 19.8572, 52.0469)
Luminance	0.1986 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557BBF #BF9955

analogous

#55B0BF #557BBF #6455BF

triadic

#557BBF #BF557B #7BBF55

tetradic

#557BBF #BF55B0 #BF9955 #55BF64

square

#557BBF #BF55B0 #BF9955 #55BF64

split-complementary

#557BBF #BF6455 #B0BF55

monochromatic

#2A4370 #3B5E9C #557BBF #819ED0 #AEC0E0

Accessibility & contrast

On white

4.22

#557BBF on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.97

#557BBF on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557BBF

4.97:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557BBF	#FFFFFF	#000000	##000000
##557BBF	1.00	4.22	4.97	4.97
#FFFFFF	4.22	1.00	21.00	21.00
#000000	4.97	21.00	1.00	1.00
##000000	4.97	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#5F81C2

Deuteranopia (green-blind)

#5277BE

Tritanopia (blue-blind)

#118A94

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #557bbf;
/* rgb */ color: rgb(85, 123, 191);
/* oklch */ color: oklch(58.5% 0.113 261.4);

Tailwind

colors: {
  custom: {
    50: '#8ca0d2',
    500: '#557bbf',
    950: '#000000',
  },
}

SCSS

$custom: #557bbf;
$custom-light: #8ca0d2;
$custom-dark: #000000;

JSON

{
  "hex": "#557bbf",
  "rgb": {
    "r": 85,
    "g": 123,
    "b": 191
  },
  "hsl": {
    "h": 218.491,
    "s": 45.299,
    "l": 54.118
  },
  "oklch": {
    "l": 0.58546,
    "c": 0.11349,
    "h": 261.4
  },
  "luminance": 0.19859
}

Semantic roles & 50–950 ramp

primary

#557BBF

secondary

#CEBEA1

accent

#A653D5

background

#F9F9FC

surface

#F1F2F9

border

#CBCCD2

text

#0D0E14

muted

#7E7E82

Preview Lab

Preview with #557BBF

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

Preview Lab → · Contrast checker → · Palette generator →