#1F4D9B#1F4D9B

#1F4D9B is a dark, vivid blue. Relative luminance 0.080; OKLCH L 43.5% C 0.137 H 260.3°. Best body text is #FFFFFF at 8.10:1 contrast (WCAG AA passes).

Color values

HEX	#1F4D9B
RGB	rgb(31, 77, 155)
HSL	hsl(218, 67%, 36%)
HSV	hsv(218, 80%, 61%)
CMYK	cmyk(80%, 50.3%, 0%, 39.2%)
CIE-LAB	lab(33.91, 13.89, -47.01)
CIE-LCH	lch(33.91, 49.01, 286.46°)
OKLab	oklab(43.48% -0.0231 -0.1352)
OKLCH	oklch(43.48% 0.137 260.3)
XYZ	xyz(9.1332, 7.9645, 32.0599)
Luminance	0.0797 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4D9B #9B6D1F

analogous

#1F8B9B #1F4D9B #2F1F9B

triadic

#1F4D9B #9B1F4D #4D9B1F

tetradic

#1F4D9B #9B1F8B #9B6D1F #1F9B2F

square

#1F4D9B #9B1F8B #9B6D1F #1F9B2F

split-complementary

#1F4D9B #9B2F1F #8B9B1F

monochromatic

#0B1A35 #153468 #1F4D9B #2966CE #5789DD

Accessibility & contrast

On white

8.10

#1F4D9B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.59

#1F4D9B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4D9B

8.10:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4D9B	#FFFFFF	#000000	##FFFFFF
##1F4D9B	1.00	8.10	2.59	8.10
#FFFFFF	8.10	1.00	21.00	1.00
#000000	2.59	21.00	1.00	21.00
##FFFFFF	8.10	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#1E569E

Deuteranopia (green-blind)

#004A99

Tritanopia (blue-blind)

#00606C

Achromatopsia (no color)

#505050

Design tokens & code

CSS

--color: #1f4d9b;
/* rgb */ color: rgb(31, 77, 155);
/* oklch */ color: oklch(43.5% 0.137 260.3);

Tailwind

colors: {
  custom: {
    50: '#6f7eb9',
    500: '#1f4d9b',
    950: '#000000',
  },
}

SCSS

$custom: #1f4d9b;
$custom-light: #6f7eb9;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4d9b",
  "rgb": {
    "r": 31,
    "g": 77,
    "b": 155
  },
  "hsl": {
    "h": 217.742,
    "s": 66.667,
    "l": 36.471
  },
  "oklch": {
    "l": 0.43478,
    "c": 0.13716,
    "h": 260.3
  },
  "luminance": 0.07966
}

Semantic roles & 50–950 ramp

primary

#1F4D9B

secondary

#C19955

accent

#AA3EEA

background

#F7F7FB

surface

#EDEEF6

border

#C8C9D0

text

#080911

muted

#7B7B80

Preview Lab

Preview with #1F4D9B

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

Preview Lab → · Contrast checker → · Palette generator →