#3057AB#3057AB

#3057AB is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.5% C 0.142 H 263.3°. Best body text is #FFFFFF at 6.82:1 contrast (WCAG AA passes).

Color values

HEX	#3057AB
RGB	rgb(48, 87, 171)
HSL	hsl(221, 56%, 43%)
HSV	hsv(221, 72%, 67%)
CMYK	cmyk(71.9%, 49.1%, 0%, 32.9%)
CIE-LAB	lab(38.52, 15.65, -49.11)
CIE-LCH	lch(38.52, 51.54, 287.67°)
OKLab	oklab(47.54% -0.0166 -0.1409)
OKLCH	oklch(47.54% 0.142 263.3)
XYZ	xyz(11.9752, 10.3838, 39.8933)
Luminance	0.1038 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3057AB #AB8430

analogous

#3094AB #3057AB #4730AB

triadic

#3057AB #AB3057 #57AB30

tetradic

#3057AB #AB3094 #AB8430 #30AB47

square

#3057AB #AB3094 #AB8430 #30AB47

split-complementary

#3057AB #AB4730 #94AB30

monochromatic

#15264B #233F7B #3057AB #4C74CD #7B99DA

Accessibility & contrast

On white

6.82

#3057AB on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.08

#3057AB on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #3057AB

6.82:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3057AB	#FFFFFF	#000000	##FFFFFF
##3057AB	1.00	6.82	3.08	6.82
#FFFFFF	6.82	1.00	21.00	1.00
#000000	3.08	21.00	1.00	21.00
##FFFFFF	6.82	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2861AE

Deuteranopia (green-blind)

#0055A9

Tritanopia (blue-blind)

#006B79

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #3057ab;
/* rgb */ color: rgb(48, 87, 171);
/* oklch */ color: oklch(47.5% 0.142 263.3);

Tailwind

colors: {
  custom: {
    50: '#7885c4',
    500: '#3057ab',
    950: '#000000',
  },
}

SCSS

$custom: #3057ab;
$custom-light: #7885c4;
$custom-dark: #000000;

JSON

{
  "hex": "#3057ab",
  "rgb": {
    "r": 48,
    "g": 87,
    "b": 171
  },
  "hsl": {
    "h": 220.976,
    "s": 56.164,
    "l": 42.941
  },
  "oklch": {
    "l": 0.47537,
    "c": 0.1419,
    "h": 263.3
  },
  "luminance": 0.10385
}

Semantic roles & 50–950 ramp

primary

#3057AB

secondary

#C3AA74

accent

#B048DF

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#0A0B13

muted

#7C7C82

Preview Lab

Preview with #3057AB

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

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