#557FBB#557FBB

#557FBB is a mid, moderate blue. Relative luminance 0.207; OKLCH L 59.2% C 0.104 H 257.3°. Best body text is #000000 at 5.14:1 contrast (WCAG AA passes).

Color values

HEX	#557FBB
RGB	rgb(85, 127, 187)
HSL	hsl(215, 43%, 53%)
HSV	hsv(215, 55%, 73%)
CMYK	cmyk(54.5%, 32.1%, 0%, 26.7%)
CIE-LAB	lab(52.62, 3.13, -35.92)
CIE-LCH	lch(52.62, 36.06, 274.98°)
OKLab	oklab(59.21% -0.0227 -0.1012)
OKLCH	oklch(59.21% 0.104 257.3)
XYZ	xyz(20.3022, 20.6963, 49.9290)
Luminance	0.2070 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#557FBB #BB9155

analogous

#55B2BB #557FBB #5E55BB

triadic

#557FBB #BB557F #7FBB55

tetradic

#557FBB #BB55B2 #BB9155 #55BB5E

square

#557FBB #BB55B2 #BB9155 #55BB5E

split-complementary

#557FBB #BB5E55 #B2BB55

monochromatic

#2B456B #3C6197 #557FBB #81A0CC #ACC1DE

Accessibility & contrast

On white

4.09

#557FBB on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.14

#557FBB on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #557FBB

5.14:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##557FBB	#FFFFFF	#000000	##000000
##557FBB	1.00	4.09	5.14	5.14
#FFFFFF	4.09	1.00	21.00	21.00
#000000	5.14	21.00	1.00	1.00
##000000	5.14	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#6783BE

Deuteranopia (green-blind)

#5A79BA

Tritanopia (blue-blind)

#188C94

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #557fbb;
/* rgb */ color: rgb(85, 127, 187);
/* oklch */ color: oklch(59.2% 0.104 257.3);

Tailwind

colors: {
  custom: {
    50: '#8ca3cf',
    500: '#557fbb',
    950: '#000000',
  },
}

SCSS

$custom: #557fbb;
$custom-light: #8ca3cf;
$custom-dark: #000000;

JSON

{
  "hex": "#557fbb",
  "rgb": {
    "r": 85,
    "g": 127,
    "b": 187
  },
  "hsl": {
    "h": 215.294,
    "s": 42.857,
    "l": 53.333
  },
  "oklch": {
    "l": 0.59214,
    "c": 0.10371,
    "h": 257.3
  },
  "luminance": 0.20698
}

Semantic roles & 50–950 ramp

primary

#557FBB

secondary

#CCBAA0

accent

#9F55D3

background

#F8FAFC

surface

#F0F3F9

border

#CBCDD2

text

#0D0F14

muted

#7D7F82

Preview Lab

Preview with #557FBB

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

Preview Lab → · Contrast checker → · Palette generator →