#315AB5#315AB5

#315AB5 is a mid, vivid blue. Relative luminance 0.113; OKLCH L 49.0% C 0.152 H 263.6°. Best body text is #FFFFFF at 6.44:1 contrast (WCAG AA passes).

Color values

HEX	#315AB5
RGB	rgb(49, 90, 181)
HSL	hsl(221, 57%, 45%)
HSV	hsv(221, 73%, 71%)
CMYK	cmyk(72.9%, 50.3%, 0%, 29%)
CIE-LAB	lab(40.08, 17.59, -52.49)
CIE-LCH	lch(40.08, 55.36, 288.53°)
OKLab	oklab(48.95% -0.017 -0.1508)
OKLCH	oklch(48.95% 0.152 263.6)
XYZ	xyz(13.2603, 11.3001, 45.1894)
Luminance	0.1130 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#315AB5 #B58C31

analogous

#319CB5 #315AB5 #4A31B5

triadic

#315AB5 #B5315A #5AB531

tetradic

#315AB5 #B5319C #B58C31 #31B54A

square

#315AB5 #B5319C #B58C31 #31B54A

split-complementary

#315AB5 #B54A31 #9CB531

monochromatic

#172A55 #244285 #315AB5 #537AD0 #839FDD

Accessibility & contrast

On white

6.44

#315AB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.26

#315AB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #315AB5

6.44:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##315AB5	#FFFFFF	#000000	##FFFFFF
##315AB5	1.00	6.44	3.26	6.44
#FFFFFF	6.44	1.00	21.00	1.00
#000000	3.26	21.00	1.00	21.00
##FFFFFF	6.44	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2465B8

Deuteranopia (green-blind)

#0059B3

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#5E5E5E

Design tokens & code

CSS

--color: #315ab5;
/* rgb */ color: rgb(49, 90, 181);
/* oklch */ color: oklch(49.0% 0.152 263.6);

Tailwind

colors: {
  custom: {
    50: '#7a88cc',
    500: '#315ab5',
    950: '#000000',
  },
}

SCSS

$custom: #315ab5;
$custom-light: #7a88cc;
$custom-dark: #000000;

JSON

{
  "hex": "#315ab5",
  "rgb": {
    "r": 49,
    "g": 90,
    "b": 181
  },
  "hsl": {
    "h": 221.364,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.48954,
    "c": 0.15178,
    "h": 263.6
  },
  "luminance": 0.11301
}

Semantic roles & 50–950 ramp

primary

#315AB5

secondary

#C7AF7B

accent

#B147E1

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #315AB5

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

Preview Lab → · Contrast checker → · Palette generator →