#313A7B#313A7B

#313A7B is a dark, moderate blue. Relative luminance 0.051; OKLCH L 37.8% C 0.110 H 274.0°. Best body text is #FFFFFF at 10.39:1 contrast (WCAG AA passes).

Color values

HEX	#313A7B
RGB	rgb(49, 58, 123)
HSL	hsl(233, 43%, 34%)
HSV	hsv(233, 60%, 48%)
CMYK	cmyk(60.2%, 52.8%, 0%, 51.8%)
CIE-LAB	lab(27.04, 17.40, -38.30)
CIE-LCH	lch(27.04, 42.07, 294.43°)
OKLab	oklab(37.77% 0.0077 -0.1095)
OKLCH	oklch(37.77% 0.11 274)
XYZ	xyz(6.3537, 5.1087, 19.3863)
Luminance	0.0511 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#313A7B #7B7231

analogous

#315F7B #313A7B #4D317B

triadic

#313A7B #7B313A #3A7B31

tetradic

#313A7B #7B315F #7B7231 #317B4D

square

#313A7B #7B315F #7B7231 #317B4D

split-complementary

#313A7B #7B4D31 #5F7B31

monochromatic

#0E1123 #20254F #313A7B #424FA7 #6570C2

Accessibility & contrast

On white

10.39

#313A7B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.02

#313A7B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #313A7B

10.39:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##313A7B	#FFFFFF	#000000	##FFFFFF
##313A7B	1.00	10.39	2.02	10.39
#FFFFFF	10.39	1.00	21.00	1.00
#000000	2.02	21.00	1.00	21.00
##FFFFFF	10.39	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#17437D

Deuteranopia (green-blind)

#083D7A

Tritanopia (blue-blind)

#004954

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #313a7b;
/* rgb */ color: rgb(49, 58, 123);
/* oklch */ color: oklch(37.8% 0.110 274.0);

Tailwind

colors: {
  custom: {
    50: '#7070a2',
    500: '#313a7b',
    950: '#000000',
  },
}

SCSS

$custom: #313a7b;
$custom-light: #7070a2;
$custom-dark: #000000;

JSON

{
  "hex": "#313a7b",
  "rgb": {
    "r": 49,
    "g": 58,
    "b": 123
  },
  "hsl": {
    "h": 232.703,
    "s": 43.023,
    "l": 33.725
  },
  "oklch": {
    "l": 0.37772,
    "c": 0.10982,
    "h": 274
  },
  "luminance": 0.05109
}

Semantic roles & 50–950 ramp

primary

#313A7B

secondary

#A9A05F

accent

#C355D3

background

#F7F6FA

surface

#EDECF3

border

#C8C7CD

text

#08070F

muted

#7B7A7F

Preview Lab

Preview with #313A7B

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

Preview Lab → · Contrast checker → · Palette generator →