#1F558C#1F558C

#1F558C is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.3% C 0.107 H 251.9°. Best body text is #FFFFFF at 7.67:1 contrast (WCAG AA passes).

Color values

HEX	#1F558C
RGB	rgb(31, 85, 140)
HSL	hsl(210, 64%, 34%)
HSV	hsv(210, 78%, 55%)
CMYK	cmyk(77.9%, 39.3%, 0%, 45.1%)
CIE-LAB	lab(35.36, 2.60, -35.57)
CIE-LCH	lch(35.36, 35.67, 274.19°)
OKLab	oklab(44.29% -0.0332 -0.1014)
OKLCH	oklch(44.29% 0.107 251.9)
XYZ	xyz(8.5454, 8.6808, 26.0310)
Luminance	0.0868 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F558C #8C561F

analogous

#1F8B8C #1F558C #1F1F8C

triadic

#1F558C #8C1F55 #558C1F

tetradic

#1F558C #8C1F8B #8C561F #1F8C1F

square

#1F558C #8C1F8B #8C561F #1F8C1F

split-complementary

#1F558C #8C1F1F #8B8C1F

monochromatic

#091828 #14375A #1F558C #2A73BE #4E92D8

Accessibility & contrast

On white

7.67

#1F558C on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1F558C on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F558C

7.67:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F558C	#FFFFFF	#000000	##FFFFFF
##1F558C	1.00	7.67	2.74	7.67
#FFFFFF	7.67	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.67	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#3B598E

Deuteranopia (green-blind)

#2A4F8B

Tritanopia (blue-blind)

#006269

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f558c;
/* rgb */ color: rgb(31, 85, 140);
/* oklch */ color: oklch(44.3% 0.107 251.9);

Tailwind

colors: {
  custom: {
    50: '#6b84ae',
    500: '#1f558c',
    950: '#000000',
  },
}

SCSS

$custom: #1f558c;
$custom-light: #6b84ae;
$custom-dark: #000000;

JSON

{
  "hex": "#1f558c",
  "rgb": {
    "r": 31,
    "g": 85,
    "b": 140
  },
  "hsl": {
    "h": 210.275,
    "s": 63.743,
    "l": 33.529
  },
  "oklch": {
    "l": 0.44293,
    "c": 0.10674,
    "h": 251.9
  },
  "luminance": 0.08682
}

Semantic roles & 50–950 ramp

primary

#1F558C

secondary

#BB844C

accent

#9541E7

background

#F6F8FA

surface

#ECEFF4

border

#C7CACE

text

#080A10

muted

#7A7C7F

Preview Lab

Preview with #1F558C

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

Preview Lab → · Contrast checker → · Palette generator →