#1F283F#1F283F

#1F283F is a dark, muted blue. Relative luminance 0.022; OKLCH L 28.0% C 0.045 H 267.2°. Best body text is #FFFFFF at 14.65:1 contrast (WCAG AA passes).

Color values

HEX	#1F283F
RGB	rgb(31, 40, 63)
HSL	hsl(223, 34%, 18%)
HSV	hsv(223, 51%, 25%)
CMYK	cmyk(50.8%, 36.5%, 0%, 75.3%)
CIE-LAB	lab(16.34, 3.53, -15.87)
CIE-LCH	lch(16.34, 16.26, 282.55°)
OKLab	oklab(28% -0.0022 -0.0445)
OKLCH	oklch(28% 0.045 267.2)
XYZ	xyz(2.2208, 2.1676, 5.0030)
Luminance	0.0217 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F283F #3F361F

analogous

#1F383F #1F283F #261F3F

triadic

#1F283F #3F1F28 #283F1F

tetradic

#1F283F #3F1F38 #3F361F #1F3F26

square

#1F283F #3F1F38 #3F361F #1F3F26

split-complementary

#1F283F #3F261F #383F1F

monochromatic

#0A0D15 #0B0E16 #1F283F #334268 #475C91

Accessibility & contrast

On white

14.65

#1F283F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

1.43

#1F283F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F283F

14.65:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F283F	#FFFFFF	#000000	##FFFFFF
##1F283F	1.00	14.65	1.43	14.65
#FFFFFF	14.65	1.00	21.00	1.00
#000000	1.43	21.00	1.00	21.00
##FFFFFF	14.65	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#202A40

Deuteranopia (green-blind)

#1D273E

Tritanopia (blue-blind)

#132D30

Achromatopsia (no color)

#282828

Design tokens & code

CSS

--color: #1f283f;
/* rgb */ color: rgb(31, 40, 63);
/* oklch */ color: oklch(28.0% 0.045 267.2);

Tailwind

colors: {
  custom: {
    50: '#5c6174',
    500: '#1f283f',
    950: '#000000',
  },
}

SCSS

$custom: #1f283f;
$custom-light: #5c6174;
$custom-dark: #000000;

JSON

{
  "hex": "#1f283f",
  "rgb": {
    "r": 31,
    "g": 40,
    "b": 63
  },
  "hsl": {
    "h": 223.125,
    "s": 34.043,
    "l": 18.431
  },
  "oklch": {
    "l": 0.28002,
    "c": 0.04454,
    "h": 267.2
  },
  "luminance": 0.02168
}

Semantic roles & 50–950 ramp

primary

#1F283F

secondary

#736747

accent

#AC5ECA

background

#F5F5F7

surface

#E9E9ED

border

#C5C5C8

text

#040508

muted

#79797B

Preview Lab

Preview with #1F283F

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

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