#1F457F#1F457F

#1F457F is a dark, moderate blue. Relative luminance 0.061; OKLCH L 39.6% C 0.107 H 258.8°. Best body text is #FFFFFF at 9.48:1 contrast (WCAG AA passes).

Color values

HEX	#1F457F
RGB	rgb(31, 69, 127)
HSL	hsl(216, 61%, 31%)
HSV	hsv(216, 76%, 50%)
CMYK	cmyk(75.6%, 45.7%, 0%, 50.2%)
CIE-LAB	lab(29.61, 8.11, -36.74)
CIE-LCH	lch(29.61, 37.62, 282.44°)
OKLab	oklab(39.56% -0.0209 -0.1052)
OKLCH	oklch(39.56% 0.107 258.8)
XYZ	xyz(6.5226, 6.0791, 20.9042)
Luminance	0.0608 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F457F #7F591F

analogous

#1F757F #1F457F #291F7F

triadic

#1F457F #7F1F45 #457F1F

tetradic

#1F457F #7F1F75 #7F591F #1F7F29

square

#1F457F #7F1F75 #7F591F #1F7F29

split-complementary

#1F457F #7F291F #757F1F

monochromatic

#07101D #132A4E #1F457F #2B60B0 #467ED2

Accessibility & contrast

On white

9.48

#1F457F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.22

#1F457F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F457F

9.48:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F457F	#FFFFFF	#000000	##FFFFFF
##1F457F	1.00	9.48	2.22	9.48
#FFFFFF	9.48	1.00	21.00	1.00
#000000	2.22	21.00	1.00	21.00
##FFFFFF	9.48	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#284B81

Deuteranopia (green-blind)

#16427E

Tritanopia (blue-blind)

#00535B

Achromatopsia (no color)

#464646

Design tokens & code

CSS

--color: #1f457f;
/* rgb */ color: rgb(31, 69, 127);
/* oklch */ color: oklch(39.6% 0.107 258.8);

Tailwind

colors: {
  custom: {
    50: '#6878a4',
    500: '#1f457f',
    950: '#000000',
  },
}

SCSS

$custom: #1f457f;
$custom-light: #6878a4;
$custom-dark: #000000;

JSON

{
  "hex": "#1f457f",
  "rgb": {
    "r": 31,
    "g": 69,
    "b": 127
  },
  "hsl": {
    "h": 216.25,
    "s": 60.759,
    "l": 30.98
  },
  "oklch": {
    "l": 0.39562,
    "c": 0.10722,
    "h": 258.8
  },
  "luminance": 0.0608
}

Semantic roles & 50–950 ramp

primary

#1F457F

secondary

#B28848

accent

#A544E4

background

#F6F7FA

surface

#EBEDF4

border

#C6C8CE

text

#07080F

muted

#7A7B7F

Preview Lab

Preview with #1F457F

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

Preview Lab → · Contrast checker → · Palette generator →