#3121B1#3121B1

#3121B1 is a dark, highly saturated blue. Relative luminance 0.049; OKLCH L 38.9% C 0.210 H 275.4°. Best body text is #FFFFFF at 10.59:1 contrast (WCAG AA passes).

Color values

HEX	#3121B1
RGB	rgb(49, 33, 177)
HSL	hsl(247, 69%, 41%)
HSV	hsv(247, 81%, 69%)
CMYK	cmyk(72.3%, 81.4%, 0%, 30.6%)
CIE-LAB	lab(26.49, 50.87, -72.36)
CIE-LCH	lch(26.49, 88.45, 305.11°)
OKLab	oklab(38.89% 0.0196 -0.2092)
OKLCH	oklch(38.89% 0.21 275.4)
XYZ	xyz(9.7437, 4.9141, 42.0215)
Luminance	0.0491 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3121B1 #A1B121

analogous

#2159B1 #3121B1 #7921B1

triadic

#3121B1 #B13121 #21B131

tetradic

#3121B1 #B12159 #A1B121 #21B179

square

#3121B1 #B12159 #A1B121 #21B179

split-complementary

#3121B1 #B17921 #59B121

monochromatic

#140E4A #23177D #3121B1 #4836D9 #7769E3

Accessibility & contrast

On white

10.59

#3121B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.98

#3121B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3121B1

10.59:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3121B1	#FFFFFF	#000000	##FFFFFF
##3121B1	1.00	10.59	1.98	10.59
#FFFFFF	10.59	1.00	21.00	1.00
#000000	1.98	21.00	1.00	21.00
##FFFFFF	10.59	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0045B5

Deuteranopia (green-blind)

#0038AF

Tritanopia (blue-blind)

#004E6A

Achromatopsia (no color)

#3F3F3F

Design tokens & code

CSS

--color: #3121b1;
/* rgb */ color: rgb(49, 33, 177);
/* oklch */ color: oklch(38.9% 0.210 275.4);

Tailwind

colors: {
  custom: {
    50: '#7e61ca',
    500: '#3121b1',
    950: '#000000',
  },
}

SCSS

$custom: #3121b1;
$custom-light: #7e61ca;
$custom-dark: #000000;

JSON

{
  "hex": "#3121b1",
  "rgb": {
    "r": 49,
    "g": 33,
    "b": 177
  },
  "hsl": {
    "h": 246.667,
    "s": 68.571,
    "l": 41.176
  },
  "oklch": {
    "l": 0.38888,
    "c": 0.21011,
    "h": 275.4
  },
  "luminance": 0.04915
}

Semantic roles & 50–950 ramp

primary

#3121B1

secondary

#BEC965

accent

#EB3CD8

background

#F8F5FC

surface

#F0EAF9

border

#CBC6D2

text

#0C0513

muted

#7D7982

Preview Lab

Preview with #3121B1

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

Preview Lab → · Contrast checker → · Palette generator →