#1F51AC#1F51AC

#1F51AC is a mid, vivid blue. Relative luminance 0.092; OKLCH L 45.7% C 0.156 H 261.2°. Best body text is #FFFFFF at 7.42:1 contrast (WCAG AA passes).

Color values

HEX	#1F51AC
RGB	rgb(31, 81, 172)
HSL	hsl(219, 69%, 40%)
HSV	hsv(219, 82%, 67%)
CMYK	cmyk(82%, 52.9%, 0%, 32.5%)
CIE-LAB	lab(36.28, 17.97, -53.36)
CIE-LCH	lch(36.28, 56.30, 288.61°)
OKLab	oklab(45.67% -0.0239 -0.1538)
OKLCH	oklch(45.67% 0.156 261.2)
XYZ	xyz(10.9512, 9.1534, 40.2113)
Luminance	0.0916 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F51AC #AC7A1F

analogous

#1F98AC #1F51AC #331FAC

triadic

#1F51AC #AC1F51 #51AC1F

tetradic

#1F51AC #AC1F98 #AC7A1F #1FAC33

square

#1F51AC #AC1F98 #AC7A1F #1FAC33

split-complementary

#1F51AC #AC331F #98AC1F

monochromatic

#0C2044 #163978 #1F51AC #2F6BD9 #6390E3

Accessibility & contrast

On white

7.42

#1F51AC on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.83

#1F51AC on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F51AC

7.42:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F51AC	#FFFFFF	#000000	##FFFFFF
##1F51AC	1.00	7.42	2.83	7.42
#FFFFFF	7.42	1.00	21.00	1.00
#000000	2.83	21.00	1.00	21.00
##FFFFFF	7.42	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#0D5CAF

Deuteranopia (green-blind)

#004FAA

Tritanopia (blue-blind)

#006776

Achromatopsia (no color)

#555555

Design tokens & code

CSS

--color: #1f51ac;
/* rgb */ color: rgb(31, 81, 172);
/* oklch */ color: oklch(45.7% 0.156 261.2);

Tailwind

colors: {
  custom: {
    50: '#7381c5',
    500: '#1f51ac',
    950: '#000000',
  },
}

SCSS

$custom: #1f51ac;
$custom-light: #7381c5;
$custom-dark: #000000;

JSON

{
  "hex": "#1f51ac",
  "rgb": {
    "r": 31,
    "g": 81,
    "b": 172
  },
  "hsl": {
    "h": 218.723,
    "s": 69.458,
    "l": 39.804
  },
  "oklch": {
    "l": 0.45674,
    "c": 0.15566,
    "h": 261.2
  },
  "luminance": 0.09155
}

Semantic roles & 50–950 ramp

primary

#1F51AC

secondary

#C8A35F

accent

#AE3CEC

background

#F7F7FC

surface

#EEEEF8

border

#C9C9D1

text

#090A13

muted

#7B7C82

Preview Lab

Preview with #1F51AC

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

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