#1F587B#1F587B

#1F587B is a dark, moderate cyan. Relative luminance 0.087; OKLCH L 44.0% C 0.082 H 239.6°. Best body text is #FFFFFF at 7.66:1 contrast (WCAG AA passes).

Color values

HEX	#1F587B
RGB	rgb(31, 88, 123)
HSL	hsl(203, 60%, 30%)
HSV	hsv(203, 75%, 48%)
CMYK	cmyk(74.8%, 28.5%, 0%, 51.8%)
CIE-LAB	lab(35.40, -5.87, -25.09)
CIE-LCH	lch(35.40, 25.77, 256.82°)
OKLab	oklab(44.02% -0.0415 -0.0708)
OKLCH	oklch(44.02% 0.082 239.6)
XYZ	xyz(7.6286, 8.7000, 20.0123)
Luminance	0.0870 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1F587B #7B421F

analogous

#1F7B70 #1F587B #1F2A7B

triadic

#1F587B #7B1F58 #587B1F

tetradic

#1F587B #701F7B #7B421F #2A7B1F

square

#1F587B #701F7B #7B421F #2A7B1F

split-complementary

#1F587B #7B1F2A #7B701F

monochromatic

#061219 #13354A #1F587B #2B7BAC #449BD0

Accessibility & contrast

On white

7.66

#1F587B on #FFFFFF

AA ✓AA large ✓AAA ✓

On black

2.74

#1F587B on #000000

AA ✗AA large ✗AAA ✗

Best text color

#FFFFFF on #1F587B

7.66:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1F587B	#FFFFFF	#000000	##FFFFFF
##1F587B	1.00	7.66	2.74	7.66
#FFFFFF	7.66	1.00	21.00	1.00
#000000	2.74	21.00	1.00	21.00
##FFFFFF	7.66	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#48587D

Deuteranopia (green-blind)

#3B4F7A

Tritanopia (blue-blind)

#006164

Achromatopsia (no color)

#535353

Design tokens & code

CSS

--color: #1f587b;
/* rgb */ color: rgb(31, 88, 123);
/* oklch */ color: oklch(44.0% 0.082 239.6);

Tailwind

colors: {
  custom: {
    50: '#6887a1',
    500: '#1f587b',
    950: '#000000',
  },
}

SCSS

$custom: #1f587b;
$custom-light: #6887a1;
$custom-dark: #000000;

JSON

{
  "hex": "#1f587b",
  "rgb": {
    "r": 31,
    "g": 88,
    "b": 123
  },
  "hsl": {
    "h": 202.826,
    "s": 59.74,
    "l": 30.196
  },
  "oklch": {
    "l": 0.44024,
    "c": 0.08207,
    "h": 239.6
  },
  "luminance": 0.08701
}

Semantic roles & 50–950 ramp

primary

#1F587B

secondary

#AE6F48

accent

#8145E3

background

#F6F8F9

surface

#EBEFF2

border

#C6CACC

text

#070B0F

muted

#7A7C7E

Preview Lab

Preview with #1F587B

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

Preview Lab → · Contrast checker → · Palette generator →