#1F548B#1F548B

#1F548B is a dark, moderate cyan. Relative luminance 0.085; OKLCH L 44.0% C 0.106 H 252.2°. Best body text is #FFFFFF at 7.78:1 contrast (WCAG AA passes).

Color values

HEX	#1F548B
RGB	rgb(31, 84, 139)
HSL	hsl(211, 64%, 33%)
HSV	hsv(211, 78%, 55%)
CMYK	cmyk(77.7%, 39.6%, 0%, 45.5%)
CIE-LAB	lab(34.99, 2.86, -35.55)
CIE-LCH	lch(34.99, 35.67, 274.60°)
OKLab	oklab(43.99% -0.0325 -0.1014)
OKLCH	oklch(43.99% 0.106 252.2)
XYZ	xyz(8.3938, 8.4951, 25.6184)
Luminance	0.0850 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F548B #8B561F

analogous

#1F8A8B #1F548B #201F8B

triadic

#1F548B #8B1F54 #548B1F

tetradic

#1F548B #8B1F8A #8B561F #1F8B20

square

#1F548B #8B1F8A #8B561F #1F8B20

split-complementary

#1F548B #8B201F #8A8B1F

monochromatic

#091827 #143659 #1F548B #2A72BD #4D91D7

Accessibility & contrast

On white

7.78

#1F548B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.70

#1F548B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F548B

7.78:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F548B	#FFFFFF	#000000	##FFFFFF
##1F548B	1.00	7.78	2.70	7.78
#FFFFFF	7.78	1.00	21.00	1.00
#000000	2.70	21.00	1.00	21.00
##FFFFFF	7.78	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3A588D

Deuteranopia (green-blind)

#294E8A

Tritanopia (blue-blind)

#006168

Achromatopsia (no color)

#525252

Design tokens & code

CSS

--color: #1f548b;
/* rgb */ color: rgb(31, 84, 139);
/* oklch */ color: oklch(44.0% 0.106 252.2);

Tailwind

colors: {
  custom: {
    50: '#6b83ad',
    500: '#1f548b',
    950: '#000000',
  },
}

SCSS

$custom: #1f548b;
$custom-light: #6b83ad;
$custom-dark: #000000;

JSON

{
  "hex": "#1f548b",
  "rgb": {
    "r": 31,
    "g": 84,
    "b": 139
  },
  "hsl": {
    "h": 210.556,
    "s": 63.529,
    "l": 33.333
  },
  "oklch": {
    "l": 0.43986,
    "c": 0.10647,
    "h": 252.2
  },
  "luminance": 0.08496
}

Semantic roles & 50–950 ramp

primary

#1F548B

secondary

#BA844C

accent

#9541E7

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1F548B

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

Preview Lab → · Contrast checker → · Palette generator →