#311EBB#311EBB

#311EBB is a dark, highly saturated blue. Relative luminance 0.052; OKLCH L 39.7% C 0.224 H 274.6°. Best body text is #FFFFFF at 10.33:1 contrast (WCAG AA passes).

Color values

HEX	#311EBB
RGB	rgb(49, 30, 187)
HSL	hsl(247, 72%, 43%)
HSV	hsv(247, 84%, 73%)
CMYK	cmyk(73.8%, 84%, 0%, 26.7%)
CIE-LAB	lab(27.21, 55.16, -77.12)
CIE-LCH	lch(27.21, 94.82, 305.58°)
OKLab	oklab(39.72% 0.0178 -0.2229)
OKLCH	oklch(39.72% 0.224 274.6)
XYZ	xyz(10.6976, 5.1683, 47.4379)
Luminance	0.0517 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#311EBB #A8BB1E

analogous

#1E5ABB #311EBB #7F1EBB

triadic

#311EBB #BB311E #1EBB31

tetradic

#311EBB #BB1E5A #A8BB1E #1EBB7F

square

#311EBB #BB1E5A #A8BB1E #1EBB7F

split-complementary

#311EBB #BB7F1E #5ABB1E

monochromatic

#150D52 #231686 #311EBB #4C37DF #7B6CE7

Accessibility & contrast

On white

10.33

#311EBB on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.03

#311EBB on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #311EBB

10.33:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##311EBB	#FFFFFF	#000000	##FFFFFF
##311EBB	1.00	10.33	2.03	10.33
#FFFFFF	10.33	1.00	21.00	1.00
#000000	2.03	21.00	1.00	21.00
##FFFFFF	10.33	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0047BF

Deuteranopia (green-blind)

#0039B8

Tritanopia (blue-blind)

#00516F

Achromatopsia (no color)

#404040

Design tokens & code

CSS

--color: #311ebb;
/* rgb */ color: rgb(49, 30, 187);
/* oklch */ color: oklch(39.7% 0.224 274.6);

Tailwind

colors: {
  custom: {
    50: '#8060d1',
    500: '#311ebb',
    950: '#000000',
  },
}

SCSS

$custom: #311ebb;
$custom-light: #8060d1;
$custom-dark: #000000;

JSON

{
  "hex": "#311ebb",
  "rgb": {
    "r": 49,
    "g": 30,
    "b": 187
  },
  "hsl": {
    "h": 247.261,
    "s": 72.35,
    "l": 42.549
  },
  "oklch": {
    "l": 0.39724,
    "c": 0.22366,
    "h": 274.6
  },
  "luminance": 0.05169
}

Semantic roles & 50–950 ramp

primary

#311EBB

secondary

#C1CD67

accent

#EF39D9

background

#F8F5FD

surface

#F0EAFA

border

#CBC6D3

text

#0C0514

muted

#7D7983

Preview Lab

Preview with #311EBB

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

Preview Lab → · Contrast checker → · Palette generator →