#1F4587#1F4587

#1F4587 is a dark, moderate blue. Relative luminance 0.063; OKLCH L 40.1% C 0.119 H 260.6°. Best body text is #FFFFFF at 9.29:1 contrast (WCAG AA passes).

Color values

HEX	#1F4587
RGB	rgb(31, 69, 135)
HSL	hsl(218, 63%, 33%)
HSV	hsv(218, 77%, 53%)
CMYK	cmyk(77%, 48.9%, 0%, 47.1%)
CIE-LAB	lab(30.15, 11.32, -40.84)
CIE-LCH	lch(30.15, 42.38, 285.49°)
OKLab	oklab(40.15% -0.0194 -0.1172)
OKLCH	oklch(40.15% 0.119 260.6)
XYZ	xyz(7.0648, 6.2960, 23.7599)
Luminance	0.0630 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4587 #87611F

analogous

#1F7987 #1F4587 #2D1F87

triadic

#1F4587 #871F45 #45871F

tetradic

#1F4587 #871F79 #87611F #1F872D

square

#1F4587 #871F79 #87611F #1F872D

split-complementary

#1F4587 #872D1F #79871F

monochromatic

#081223 #142C55 #1F4587 #2A5EB9 #4B7ED6

Accessibility & contrast

On white

9.29

#1F4587 on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1F4587 on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4587

9.29:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4587	#FFFFFF	#000000	##FFFFFF
##1F4587	1.00	9.29	2.26	9.29
#FFFFFF	9.29	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.29	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#214C89

Deuteranopia (green-blind)

#034386

Tritanopia (blue-blind)

#00555F

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f4587;
/* rgb */ color: rgb(31, 69, 135);
/* oklch */ color: oklch(40.1% 0.119 260.6);

Tailwind

colors: {
  custom: {
    50: '#6a78aa',
    500: '#1f4587',
    950: '#000000',
  },
}

SCSS

$custom: #1f4587;
$custom-light: #6a78aa;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4587",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 135
  },
  "hsl": {
    "h": 218.077,
    "s": 62.651,
    "l": 32.549
  },
  "oklch": {
    "l": 0.40148,
    "c": 0.11884,
    "h": 260.6
  },
  "luminance": 0.06297
}

Semantic roles & 50–950 ramp

primary

#1F4587

secondary

#B8904A

accent

#AA42E6

background

#F6F7FA

surface

#ECEDF4

border

#C7C8CE

text

#070810

muted

#7A7B7F

Preview Lab

Preview with #1F4587

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

Preview Lab → · Contrast checker → · Palette generator →