#1F405B#1F405B

#1F405B is a dark, moderate cyan. Relative luminance 0.047; OKLCH L 36.0% C 0.061 H 245.3°. Best body text is #FFFFFF at 10.81:1 contrast (WCAG AA passes).

Color values

HEX	#1F405B
RGB	rgb(31, 64, 91)
HSL	hsl(207, 49%, 24%)
HSV	hsv(207, 66%, 36%)
CMYK	cmyk(65.9%, 29.7%, 0%, 64.3%)
CIE-LAB	lab(25.90, -2.64, -19.70)
CIE-LCH	lch(25.90, 19.88, 262.37°)
OKLab	oklab(35.98% -0.0254 -0.0554)
OKLCH	oklch(35.98% 0.061 245.3)
XYZ	xyz(4.2861, 4.7130, 10.5793)
Luminance	0.0471 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F405B #5B3A1F

analogous

#1F5B58 #1F405B #1F225B

triadic

#1F405B #5B1F40 #405B1F

tetradic

#1F405B #581F5B #5B3A1F #225B1F

square

#1F405B #581F5B #5B3A1F #225B1F

split-complementary

#1F405B #5B1F22 #5B581F

monochromatic

#081017 #0F202D #1F405B #2F6089 #3E80B6

Accessibility & contrast

On white

10.81

#1F405B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.94

#1F405B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F405B

10.81:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F405B	#FFFFFF	#000000	##FFFFFF
##1F405B	1.00	10.81	1.94	10.81
#FFFFFF	10.81	1.00	21.00	1.00
#000000	1.94	21.00	1.00	21.00
##FFFFFF	10.81	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#34415C

Deuteranopia (green-blind)

#2C3B5A

Tritanopia (blue-blind)

#004649

Achromatopsia (no color)

#3D3D3D

Design tokens & code

CSS

--color: #1f405b;
/* rgb */ color: rgb(31, 64, 91);
/* oklch */ color: oklch(36.0% 0.061 245.3);

Tailwind

colors: {
  custom: {
    50: '#617489',
    500: '#1f405b',
    950: '#000000',
  },
}

SCSS

$custom: #1f405b;
$custom-light: #617489;
$custom-dark: #000000;

JSON

{
  "hex": "#1f405b",
  "rgb": {
    "r": 31,
    "g": 64,
    "b": 91
  },
  "hsl": {
    "h": 207,
    "s": 49.18,
    "l": 23.922
  },
  "oklch": {
    "l": 0.3598,
    "c": 0.06099,
    "h": 245.3
  },
  "luminance": 0.04713
}

Semantic roles & 50–950 ramp

primary

#1F405B

secondary

#906746

accent

#8D4FD9

background

#F5F7F8

surface

#EAEDF0

border

#C6C8CB

text

#05080B

muted

#797B7C

Preview Lab

Preview with #1F405B

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

Preview Lab → · Contrast checker → · Palette generator →