#1F438F#1F438F

#1F438F is a dark, vivid blue. Relative luminance 0.063; OKLCH L 40.3% C 0.133 H 262.8°. Best body text is #FFFFFF at 9.30:1 contrast (WCAG AA passes).

Color values

HEX	#1F438F
RGB	rgb(31, 67, 143)
HSL	hsl(221, 64%, 34%)
HSV	hsv(221, 78%, 56%)
CMYK	cmyk(78.3%, 53.1%, 0%, 43.9%)
CIE-LAB	lab(30.13, 15.90, -45.81)
CIE-LCH	lch(30.13, 48.49, 289.15°)
OKLab	oklab(40.32% -0.0166 -0.1319)
OKLCH	oklch(40.32% 0.133 262.8)
XYZ	xyz(7.5284, 6.2879, 26.7982)
Luminance	0.0629 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F438F #8F6B1F

analogous

#1F7B8F #1F438F #331F8F

triadic

#1F438F #8F1F43 #438F1F

tetradic

#1F438F #8F1F7B #8F6B1F #1F8F33

square

#1F438F #8F1F7B #8F6B1F #1F8F33

split-complementary

#1F438F #8F331F #7B8F1F

monochromatic

#09142A #142B5D #1F438F #2A5BC1 #4F7CD9

Accessibility & contrast

On white

9.30

#1F438F on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.26

#1F438F on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F438F

9.30:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F438F	#FFFFFF	#000000	##FFFFFF
##1F438F	1.00	9.30	2.26	9.30
#FFFFFF	9.30	1.00	21.00	1.00
#000000	2.26	21.00	1.00	21.00
##FFFFFF	9.30	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0F4C92

Deuteranopia (green-blind)

#00428D

Tritanopia (blue-blind)

#005562

Achromatopsia (no color)

#474747

Design tokens & code

CSS

--color: #1f438f;
/* rgb */ color: rgb(31, 67, 143);
/* oklch */ color: oklch(40.3% 0.133 262.8);

Tailwind

colors: {
  custom: {
    50: '#6c76b0',
    500: '#1f438f',
    950: '#000000',
  },
}

SCSS

$custom: #1f438f;
$custom-light: #6c76b0;
$custom-dark: #000000;

JSON

{
  "hex": "#1f438f",
  "rgb": {
    "r": 31,
    "g": 67,
    "b": 143
  },
  "hsl": {
    "h": 220.714,
    "s": 64.368,
    "l": 34.118
  },
  "oklch": {
    "l": 0.40315,
    "c": 0.13292,
    "h": 262.8
  },
  "luminance": 0.06289
}

Semantic roles & 50–950 ramp

primary

#1F438F

secondary

#BC994E

accent

#B240E7

background

#F7F7FA

surface

#EDEDF5

border

#C8C8CF

text

#080811

muted

#7B7B80

Preview Lab

Preview with #1F438F

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

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