#3128B4#3128B4

#3128B4 is a dark, highly saturated blue. Relative luminance 0.055; OKLCH L 40.1% C 0.208 H 274.4°. Best body text is #FFFFFF at 10.03:1 contrast (WCAG AA passes).

Color values

HEX	#3128B4
RGB	rgb(49, 40, 180)
HSL	hsl(244, 64%, 43%)
HSV	hsv(244, 78%, 71%)
CMYK	cmyk(72.8%, 77.8%, 0%, 29.4%)
CIE-LAB	lab(28.02, 48.34, -71.61)
CIE-LCH	lch(28.02, 86.40, 304.02°)
OKLab	oklab(40.05% 0.0161 -0.2071)
OKLCH	oklch(40.05% 0.208 274.4)
XYZ	xyz(10.2609, 5.4648, 43.6852)
Luminance	0.0547 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#3128B4 #ABB428

analogous

#2865B4 #3128B4 #7728B4

triadic

#3128B4 #B43128 #28B431

tetradic

#3128B4 #B42865 #ABB428 #28B477

square

#3128B4 #B42865 #ABB428 #28B477

split-complementary

#3128B4 #B47728 #65B428

monochromatic

#161250 #231D82 #3128B4 #4D44D5 #7D76E1

Accessibility & contrast

On white

10.03

#3128B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.09

#3128B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #3128B4

10.03:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##3128B4	#FFFFFF	#000000	##FFFFFF
##3128B4	1.00	10.03	2.09	10.03
#FFFFFF	10.03	1.00	21.00	1.00
#000000	2.09	21.00	1.00	21.00
##FFFFFF	10.03	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0048B8

Deuteranopia (green-blind)

#003CB2

Tritanopia (blue-blind)

#00526D

Achromatopsia (no color)

#424242

Design tokens & code

CSS

--color: #3128b4;
/* rgb */ color: rgb(49, 40, 180);
/* oklch */ color: oklch(40.1% 0.208 274.4);

Tailwind

colors: {
  custom: {
    50: '#7e65cc',
    500: '#3128b4',
    950: '#000000',
  },
}

SCSS

$custom: #3128b4;
$custom-light: #7e65cc;
$custom-dark: #000000;

JSON

{
  "hex": "#3128b4",
  "rgb": {
    "r": 49,
    "g": 40,
    "b": 180
  },
  "hsl": {
    "h": 243.857,
    "s": 63.636,
    "l": 43.137
  },
  "oklch": {
    "l": 0.40054,
    "c": 0.20775,
    "h": 274.4
  },
  "luminance": 0.05466
}

Semantic roles & 50–950 ramp

primary

#3128B4

secondary

#C2C870

accent

#E741DC

background

#F8F6FC

surface

#F0EBF9

border

#CBC6D2

text

#0C0614

muted

#7D7A82

Preview Lab

Preview with #3128B4

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

Preview Lab → · Contrast checker → · Palette generator →