#313F7B#313F7B

#313F7B is a dark, moderate blue. Relative luminance 0.056; OKLCH L 38.9% C 0.103 H 271.1°. Best body text is #FFFFFF at 9.87:1 contrast (WCAG AA passes).

Color values

HEX	#313F7B
RGB	rgb(49, 63, 123)
HSL	hsl(229, 43%, 34%)
HSV	hsv(229, 60%, 48%)
CMYK	cmyk(60.2%, 48.8%, 0%, 51.8%)
CIE-LAB	lab(28.48, 13.98, -36.00)
CIE-LCH	lch(28.48, 38.62, 291.23°)
OKLab	oklab(38.86% 0.0019 -0.1027)
OKLCH	oklch(38.86% 0.103 271.1)
XYZ	xyz(6.6181, 5.6375, 19.4745)
Luminance	0.0564 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313F7B #7B6D31

analogous

#31647B #313F7B #48317B

triadic

#313F7B #7B313F #3F7B31

tetradic

#313F7B #7B3164 #7B6D31 #317B48

square

#313F7B #7B3164 #7B6D31 #317B48

split-complementary

#313F7B #7B4831 #647B31

monochromatic

#0E1223 #20294F #313F7B #4255A7 #6576C2

Accessibility & contrast

On white

9.87

#313F7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.13

#313F7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313F7B

9.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313F7B	#FFFFFF	#000000	##FFFFFF
##313F7B	1.00	9.87	2.13	9.87
#FFFFFF	9.87	1.00	21.00	1.00
#000000	2.13	21.00	1.00	21.00
##FFFFFF	9.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#23477D

Deuteranopia (green-blind)

#18407A

Tritanopia (blue-blind)

#004C57

Achromatopsia (no color)

#434343

Design tokens & code

CSS

--color: #313f7b;
/* rgb */ color: rgb(49, 63, 123);
/* oklch */ color: oklch(38.9% 0.103 271.1);

Tailwind

colors: {
  custom: {
    50: '#7073a1',
    500: '#313f7b',
    950: '#000000',
  },
}

SCSS

$custom: #313f7b;
$custom-light: #7073a1;
$custom-dark: #000000;

JSON

{
  "hex": "#313f7b",
  "rgb": {
    "r": 49,
    "g": 63,
    "b": 123
  },
  "hsl": {
    "h": 228.649,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.38861,
    "c": 0.10273,
    "h": 271.1
  },
  "luminance": 0.05638
}

Semantic roles & 50–950 ramp

primary

#313F7B

secondary

#A99B5F

accent

#BB55D3

background

#F7F6FA

surface

#EDECF3

border

#C8C7CD

text

#08080F

muted

#7B7B7F

Preview Lab

Preview with #313F7B

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

Preview Lab → · Contrast checker → · Palette generator →