#1F4BAD#1F4BAD

#1F4BAD is a dark, vivid blue. Relative luminance 0.083; OKLCH L 44.5% C 0.164 H 263.1°. Best body text is #FFFFFF at 7.87:1 contrast (WCAG AA passes).

Color values

HEX	#1F4BAD
RGB	rgb(31, 75, 173)
HSL	hsl(221, 70%, 40%)
HSV	hsv(221, 82%, 68%)
CMYK	cmyk(82.1%, 56.6%, 0%, 32.2%)
CIE-LAB	lab(34.68, 22.39, -56.55)
CIE-LCH	lch(34.68, 60.82, 291.60°)
OKLab	oklab(44.49% -0.0197 -0.1633)
OKLCH	oklch(44.49% 0.164 263.1)
XYZ	xyz(10.6213, 8.3393, 40.5769)
Luminance	0.0834 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4BAD #AD811F

analogous

#1F92AD #1F4BAD #3A1FAD

triadic

#1F4BAD #AD1F4B #4BAD1F

tetradic

#1F4BAD #AD1F92 #AD811F #1FAD3A

square

#1F4BAD #AD1F92 #AD811F #1FAD3A

split-complementary

#1F4BAD #AD3A1F #92AD1F

monochromatic

#0C1E45 #163579 #1F4BAD #2F64DA #638BE3

Accessibility & contrast

On white

7.87

#1F4BAD on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.67

#1F4BAD on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4BAD

7.87:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4BAD	#FFFFFF	#000000	##FFFFFF
##1F4BAD	1.00	7.87	2.67	7.87
#FFFFFF	7.87	1.00	21.00	1.00
#000000	2.67	21.00	1.00	21.00
##FFFFFF	7.87	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0058B0

Deuteranopia (green-blind)

#004BAB

Tritanopia (blue-blind)

#006374

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f4bad;
/* rgb */ color: rgb(31, 75, 173);
/* oklch */ color: oklch(44.5% 0.164 263.1);

Tailwind

colors: {
  custom: {
    50: '#747cc6',
    500: '#1f4bad',
    950: '#000000',
  },
}

SCSS

$custom: #1f4bad;
$custom-light: #747cc6;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4bad",
  "rgb": {
    "r": 31,
    "g": 75,
    "b": 173
  },
  "hsl": {
    "h": 221.408,
    "s": 69.608,
    "l": 40
  },
  "oklch": {
    "l": 0.44487,
    "c": 0.16449,
    "h": 263.1
  },
  "luminance": 0.08341
}

Semantic roles & 50–950 ramp

primary

#1F4BAD

secondary

#C8A860

accent

#B63BEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#0A0913

muted

#7C7B82

Preview Lab

Preview with #1F4BAD

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

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