#31599B#31599B

#31599B is a mid, moderate blue. Relative luminance 0.102; OKLCH L 46.9% C 0.116 H 259.9°. Best body text is #FFFFFF at 6.92:1 contrast (WCAG AA passes).

Color values

HEX	#31599B
RGB	rgb(49, 89, 155)
HSL	hsl(217, 52%, 40%)
HSV	hsv(217, 68%, 61%)
CMYK	cmyk(68.4%, 42.6%, 0%, 39.2%)
CIE-LAB	lab(38.13, 8.49, -40.19)
CIE-LCH	lch(38.13, 41.08, 281.93°)
OKLab	oklab(46.92% -0.0205 -0.1147)
OKLCH	oklch(46.92% 0.116 259.9)
XYZ	xyz(10.7533, 10.1632, 32.3990)
Luminance	0.1016 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#31599B #9B7331

analogous

#318E9B #31599B #3E319B

triadic

#31599B #9B3159 #599B31

tetradic

#31599B #9B318E #9B7331 #319B3E

square

#31599B #9B318E #9B7331 #319B3E

split-complementary

#31599B #9B3E31 #8E9B31

monochromatic

#14243E #223E6D #31599B #4575C4 #7398D3

Accessibility & contrast

On white

6.92

#31599B on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.03

#31599B on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #31599B

6.92:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##31599B	#FFFFFF	#000000	##FFFFFF
##31599B	1.00	6.92	3.03	6.92
#FFFFFF	6.92	1.00	21.00	1.00
#000000	3.03	21.00	1.00	21.00
##FFFFFF	6.92	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A5F9E

Deuteranopia (green-blind)

#29559A

Tritanopia (blue-blind)

#006872

Achromatopsia (no color)

#5A5A5A

Design tokens & code

CSS

--color: #31599b;
/* rgb */ color: rgb(49, 89, 155);
/* oklch */ color: oklch(46.9% 0.116 259.9);

Tailwind

colors: {
  custom: {
    50: '#7587b9',
    500: '#31599b',
    950: '#000000',
  },
}

SCSS

$custom: #31599b;
$custom-light: #7587b9;
$custom-dark: #000000;

JSON

{
  "hex": "#31599b",
  "rgb": {
    "r": 49,
    "g": 89,
    "b": 155
  },
  "hsl": {
    "h": 217.358,
    "s": 51.961,
    "l": 40
  },
  "oklch": {
    "l": 0.46924,
    "c": 0.11647,
    "h": 259.9
  },
  "luminance": 0.10164
}

Semantic roles & 50–950 ramp

primary

#31599B

secondary

#BB9D6D

accent

#A54CDB

background

#F7F8FB

surface

#EEEFF6

border

#C9CAD0

text

#090B11

muted

#7B7C80

Preview Lab

Preview with #31599B

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

Preview Lab → · Contrast checker → · Palette generator →