#1937B4#1937B4

#1937B4 is a dark, vivid blue. Relative luminance 0.062; OKLCH L 41.1% C 0.199 H 266.1°. Best body text is #FFFFFF at 9.35:1 contrast (WCAG AA passes).

Color values

HEX	#1937B4
RGB	rgb(25, 55, 180)
HSL	hsl(228, 76%, 40%)
HSV	hsv(228, 86%, 71%)
CMYK	cmyk(86.1%, 69.4%, 0%, 29.4%)
CIE-LAB	lab(29.99, 37.82, -68.39)
CIE-LCH	lch(29.99, 78.15, 298.94°)
OKLab	oklab(41.15% -0.0135 -0.1983)
OKLCH	oklch(41.15% 0.199 266.1)
XYZ	xyz(10.0024, 6.2331, 43.8471)
Luminance	0.0623 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1937B4 #B49619

analogous

#1985B4 #1937B4 #4819B4

triadic

#1937B4 #B41937 #37B419

tetradic

#1937B4 #B41985 #B49619 #19B448

square

#1937B4 #B41985 #B49619 #19B448

split-complementary

#1937B4 #B44819 #85B419

monochromatic

#0A1649 #12277E #1937B4 #294DE1 #5F79E9

Accessibility & contrast

On white

9.35

#1937B4 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.25

#1937B4 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1937B4

9.35:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1937B4	#FFFFFF	#000000	##FFFFFF
##1937B4	1.00	9.35	2.25	9.35
#FFFFFF	9.35	1.00	21.00	1.00
#000000	2.25	21.00	1.00	21.00
##FFFFFF	9.35	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#004EB8

Deuteranopia (green-blind)

#003FB2

Tritanopia (blue-blind)

#005A71

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1937b4;
/* rgb */ color: rgb(25, 55, 180);
/* oklch */ color: oklch(41.1% 0.199 266.1);

Tailwind

colors: {
  custom: {
    50: '#766ecc',
    500: '#1937b4',
    950: '#000000',
  },
}

SCSS

$custom: #1937b4;
$custom-light: #766ecc;
$custom-dark: #000000;

JSON

{
  "hex": "#1937b4",
  "rgb": {
    "r": 25,
    "g": 55,
    "b": 180
  },
  "hsl": {
    "h": 228.387,
    "s": 75.61,
    "l": 40.196
  },
  "oklch": {
    "l": 0.4115,
    "c": 0.19875,
    "h": 266.1
  },
  "luminance": 0.06234
}

Semantic roles & 50–950 ramp

primary

#1937B4

secondary

#CDB75C

accent

#CE36F2

background

#F8F6FC

surface

#EFEBF9

border

#CAC6D2

text

#0A0713

muted

#7C7A82

Preview Lab

Preview with #1937B4

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

Preview Lab → · Contrast checker → · Palette generator →