#315BB5#315BB5

#315BB5 is a mid, vivid blue. Relative luminance 0.115; OKLCH L 49.2% C 0.151 H 263.2°. Best body text is #FFFFFF at 6.37:1 contrast (WCAG AA passes).

Color values

HEX	#315BB5
RGB	rgb(49, 91, 181)
HSL	hsl(221, 57%, 45%)
HSV	hsv(221, 73%, 71%)
CMYK	cmyk(72.9%, 49.7%, 0%, 29%)
CIE-LAB	lab(40.36, 16.94, -52.04)
CIE-LCH	lch(40.36, 54.73, 288.03°)
OKLab	oklab(49.17% -0.0179 -0.1495)
OKLCH	oklch(49.17% 0.151 263.2)
XYZ	xyz(13.3452, 11.4699, 45.2177)
Luminance	0.1147 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#315BB5 #B58B31

analogous

#319DB5 #315BB5 #4931B5

triadic

#315BB5 #B5315B #5BB531

tetradic

#315BB5 #B5319D #B58B31 #31B549

square

#315BB5 #B5319D #B58B31 #31B549

split-complementary

#315BB5 #B54931 #9DB531

monochromatic

#172B55 #244385 #315BB5 #537BD0 #83A0DD

Accessibility & contrast

On white

6.37

#315BB5 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.29

#315BB5 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #315BB5

6.37:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##315BB5	#FFFFFF	#000000	##FFFFFF
##315BB5	1.00	6.37	3.29	6.37
#FFFFFF	6.37	1.00	21.00	1.00
#000000	3.29	21.00	1.00	21.00
##FFFFFF	6.37	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2766B8

Deuteranopia (green-blind)

#0059B3

Tritanopia (blue-blind)

#00707F

Achromatopsia (no color)

#5F5F5F

Design tokens & code

CSS

--color: #315bb5;
/* rgb */ color: rgb(49, 91, 181);
/* oklch */ color: oklch(49.2% 0.151 263.2);

Tailwind

colors: {
  custom: {
    50: '#7a88cc',
    500: '#315bb5',
    950: '#000000',
  },
}

SCSS

$custom: #315bb5;
$custom-light: #7a88cc;
$custom-dark: #000000;

JSON

{
  "hex": "#315bb5",
  "rgb": {
    "r": 49,
    "g": 91,
    "b": 181
  },
  "hsl": {
    "h": 220.909,
    "s": 57.391,
    "l": 45.098
  },
  "oklch": {
    "l": 0.49167,
    "c": 0.15055,
    "h": 263.2
  },
  "luminance": 0.11471
}

Semantic roles & 50–950 ramp

primary

#315BB5

secondary

#C7AF7B

accent

#B047E1

background

#F8F8FC

surface

#EFEFF9

border

#CACAD2

text

#0B0B13

muted

#7C7C82

Preview Lab

Preview with #315BB5

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

Preview Lab → · Contrast checker → · Palette generator →