#2730B1#2730B1

#2730B1 is a dark, vivid blue. Relative luminance 0.057; OKLCH L 40.3% C 0.199 H 270.5°. Best body text is #FFFFFF at 9.79:1 contrast (WCAG AA passes).

Color values

HEX	#2730B1
RGB	rgb(39, 48, 177)
HSL	hsl(236, 64%, 42%)
HSV	hsv(236, 78%, 69%)
CMYK	cmyk(78%, 72.9%, 0%, 30.6%)
CIE-LAB	lab(28.69, 42.04, -68.73)
CIE-LCH	lch(28.69, 80.57, 301.45°)
OKLab	oklab(40.28% 0.0016 -0.199)
OKLCH	oklch(40.28% 0.199 270.5)
XYZ	xyz(9.8268, 5.7185, 42.1723)
Luminance	0.0572 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Blue With A Hint Of Purple

#533CC6

ΔE00 6.56

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2730B1 #B1A827

analogous

#2775B1 #2730B1 #6327B1

triadic

#2730B1 #B12730 #30B127

tetradic

#2730B1 #B12775 #B1A827 #27B163

square

#2730B1 #B12775 #B1A827 #27B163

split-complementary

#2730B1 #B16327 #75B127

monochromatic

#11154D #1C227F #2730B1 #404AD5 #727AE0

Accessibility & contrast

On white

9.79

#2730B1 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.14

#2730B1 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #2730B1

9.79:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2730B1	#FFFFFF	#000000	##FFFFFF
##2730B1	1.00	9.79	2.14	9.79
#FFFFFF	9.79	1.00	21.00	1.00
#000000	2.14	21.00	1.00	21.00
##FFFFFF	9.79	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004AB5

Deuteranopia (green-blind)

#003DAF

Tritanopia (blue-blind)

#00556D

Achromatopsia (no color)

#444444

Design tokens & code

CSS

--color: #2730b1;
/* rgb */ color: rgb(39, 48, 177);
/* oklch */ color: oklch(40.3% 0.199 270.5);

Tailwind

colors: {
  custom: {
    50: '#7969ca',
    500: '#2730b1',
    950: '#000000',
  },
}

SCSS

$custom: #2730b1;
$custom-light: #7969ca;
$custom-dark: #000000;

JSON

{
  "hex": "#2730b1",
  "rgb": {
    "r": 39,
    "g": 48,
    "b": 177
  },
  "hsl": {
    "h": 236.087,
    "s": 63.889,
    "l": 42.353
  },
  "oklch": {
    "l": 0.40278,
    "c": 0.19905,
    "h": 270.5
  },
  "luminance": 0.0572
}

Semantic roles & 50–950 ramp

primary

#2730B1

secondary

#C7C16D

accent

#DC41E7

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0B0613

muted

#7C7A82

Preview Lab

Preview with #2730B1

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

Preview Lab → · Contrast checker → · Palette generator →