#1F4C8B#1F4C8B

#1F4C8B is a dark, moderate blue. Relative luminance 0.073; OKLCH L 42.1% C 0.116 H 257.5°. Best body text is #FFFFFF at 8.52:1 contrast (WCAG AA passes).

Color values

HEX	#1F4C8B
RGB	rgb(31, 76, 139)
HSL	hsl(215, 64%, 33%)
HSV	hsv(215, 78%, 55%)
CMYK	cmyk(77.7%, 45.3%, 0%, 45.5%)
CIE-LAB	lab(32.53, 8.17, -39.48)
CIE-LCH	lch(32.53, 40.31, 281.69°)
OKLab	oklab(42.07% -0.025 -0.1131)
OKLCH	oklch(42.07% 0.116 257.5)
XYZ	xyz(7.8080, 7.3234, 25.4231)
Luminance	0.0732 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F4C8B #8B5E1F

analogous

#1F828B #1F4C8B #281F8B

triadic

#1F4C8B #8B1F4C #4C8B1F

tetradic

#1F4C8B #8B1F82 #8B5E1F #1F8B28

square

#1F4C8B #8B1F82 #8B5E1F #1F8B28

split-complementary

#1F4C8B #8B281F #828B1F

monochromatic

#091527 #143159 #1F4C8B #2A67BD #4D87D7

Accessibility & contrast

On white

8.52

#1F4C8B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.46

#1F4C8B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F4C8B

8.52:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F4C8B	#FFFFFF	#000000	##FFFFFF
##1F4C8B	1.00	8.52	2.46	8.52
#FFFFFF	8.52	1.00	21.00	1.00
#000000	2.46	21.00	1.00	21.00
##FFFFFF	8.52	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2C528D

Deuteranopia (green-blind)

#17488A

Tritanopia (blue-blind)

#005B64

Achromatopsia (no color)

#4D4D4D

Design tokens & code

CSS

--color: #1f4c8b;
/* rgb */ color: rgb(31, 76, 139);
/* oklch */ color: oklch(42.1% 0.116 257.5);

Tailwind

colors: {
  custom: {
    50: '#6b7dad',
    500: '#1f4c8b',
    950: '#000000',
  },
}

SCSS

$custom: #1f4c8b;
$custom-light: #6b7dad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f4c8b",
  "rgb": {
    "r": 31,
    "g": 76,
    "b": 139
  },
  "hsl": {
    "h": 215,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.42072,
    "c": 0.11581,
    "h": 257.5
  },
  "luminance": 0.07324
}

Semantic roles & 50–950 ramp

primary

#1F4C8B

secondary

#BA8C4C

accent

#A241E7

background

#F6F7FA

surface

#ECEEF4

border

#C7C9CE

text

#080910

muted

#7A7B7F

Preview Lab

Preview with #1F4C8B

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

Preview Lab → · Contrast checker → · Palette generator →