#557DB5#557DB5

#557DB5 is a mid, moderate blue. Relative luminance 0.199; OKLCH L 58.5% C 0.098 H 256.9°. Best body text is #000000 at 4.99:1 contrast (WCAG AA passes).

Color values

HEX	#557DB5
RGB	rgb(85, 125, 181)
HSL	hsl(215, 39%, 52%)
HSV	hsv(215, 53%, 71%)
CMYK	cmyk(53%, 30.9%, 0%, 29%)
CIE-LAB	lab(51.76, 2.40, -33.82)
CIE-LCH	lch(51.76, 33.90, 274.07°)
OKLab	oklab(58.46% -0.0221 -0.0951)
OKLCH	oklch(58.46% 0.098 256.9)
XYZ	xyz(19.4176, 19.9332, 46.5314)
Luminance	0.1993 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557DB5 #B58D55

analogous

#55ADB5 #557DB5 #5D55B5

triadic

#557DB5 #B5557D #7DB555

tetradic

#557DB5 #B555AD #B58D55 #55B55D

square

#557DB5 #B555AD #B58D55 #55B55D

split-complementary

#557DB5 #B55D55 #ADB555

monochromatic

#2C4364 #3E608F #557DB5 #809EC8 #AABEDA

Accessibility & contrast

On white

4.21

#557DB5 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

4.99

#557DB5 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557DB5

4.99:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557DB5	#FFFFFF	#000000	##000000
##557DB5	1.00	4.21	4.99	4.99
#FFFFFF	4.21	1.00	21.00	21.00
#000000	4.99	21.00	1.00	1.00
##000000	4.99	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6780B7

Deuteranopia (green-blind)

#5B77B4

Tritanopia (blue-blind)

#228991

Achromatopsia (no color)

#7B7B7B

Design tokens & code

CSS

--color: #557db5;
/* rgb */ color: rgb(85, 125, 181);
/* oklch */ color: oklch(58.5% 0.098 256.9);

Tailwind

colors: {
  custom: {
    50: '#8ba2cb',
    500: '#557db5',
    950: '#000000',
  },
}

SCSS

$custom: #557db5;
$custom-light: #8ba2cb;
$custom-dark: #000000;

JSON

{
  "hex": "#557db5",
  "rgb": {
    "r": 85,
    "g": 125,
    "b": 181
  },
  "hsl": {
    "h": 215,
    "s": 39.344,
    "l": 52.157
  },
  "oklch": {
    "l": 0.58455,
    "c": 0.09762,
    "h": 256.9
  },
  "luminance": 0.19935
}

Semantic roles & 50–950 ramp

primary

#557DB5

secondary

#C8B69E

accent

#9E59CF

background

#F8F9FC

surface

#F0F2F8

border

#CBCCD1

text

#0C0F13

muted

#7D7E82

Preview Lab

Preview with #557DB5

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

Preview Lab → · Contrast checker → · Palette generator →