#313F7C#313F7C

#313F7C is a dark, moderate blue. Relative luminance 0.057; OKLCH L 38.9% C 0.104 H 271.1°. Best body text is #FFFFFF at 9.85:1 contrast (WCAG AA passes).

Color values

HEX	#313F7C
RGB	rgb(49, 63, 124)
HSL	hsl(229, 43%, 34%)
HSV	hsv(229, 60%, 49%)
CMYK	cmyk(60.5%, 49.2%, 0%, 51.4%)
CIE-LAB	lab(28.55, 14.35, -36.52)
CIE-LCH	lch(28.55, 39.24, 291.45°)
OKLab	oklab(38.93% 0.002 -0.1042)
OKLCH	oklch(38.93% 0.104 271.1)
XYZ	xyz(6.6810, 5.6627, 19.8058)
Luminance	0.0566 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F7C #7C6E31

analogous

#31657C #313F7C #49317C

triadic

#313F7C #7C313F #3F7C31

tetradic

#313F7C #7C3165 #7C6E31 #317C49

square

#313F7C #7C3165 #7C6E31 #317C49

split-complementary

#313F7C #7C4931 #657C31

monochromatic

#0E1224 #202950 #313F7C #4255A8 #6577C2

Accessibility & contrast

On white

9.85

#313F7C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#313F7C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F7C

9.85:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F7C	#FFFFFF	#000000	##FFFFFF
##313F7C	1.00	9.85	2.13	9.85
#FFFFFF	9.85	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.85	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#22477E

Deuteranopia (green-blind)

#16407B

Tritanopia (blue-blind)

#004D57

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313f7c;
/* rgb */ color: rgb(49, 63, 124);
/* oklch */ color: oklch(38.9% 0.104 271.1);

Tailwind

colors: {
  custom: {
    50: '#7073a2',
    500: '#313f7c',
    950: '#000000',
  },
}

SCSS

$custom: #313f7c;
$custom-light: #7073a2;
$custom-dark: #000000;

JSON

{
  "hex": "#313f7c",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 124
  },
  "hsl": {
    "h": 228.8,
    "s": 43.353,
    "l": 33.922
  },
  "oklch": {
    "l": 0.38933,
    "c": 0.10426,
    "h": 271.1
  },
  "luminance": 0.05663
}

Semantic roles & 50–950 ramp

primary

#313F7C

secondary

#AA9C5F

accent

#BC55D3

background

#F7F6FA

surface

#EDECF3

border

#C8C7CD

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #313F7C

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

Preview Lab → · Contrast checker → · Palette generator →