#1587B4#1587B4

#1587B4 is a mid, moderate cyan. Relative luminance 0.208; OKLCH L 58.6% C 0.114 H 231.9°. Best body text is #000000 at 5.16:1 contrast (WCAG AA passes).

Color values

HEX	#1587B4
RGB	rgb(21, 135, 180)
HSL	hsl(197, 79%, 39%)
HSV	hsv(197, 88%, 71%)
CMYK	cmyk(88.3%, 25%, 0%, 29.4%)
CIE-LAB	lab(52.71, -13.30, -31.91)
CIE-LCH	lch(52.71, 34.57, 247.37°)
OKLab	oklab(58.64% -0.0706 -0.0901)
OKLCH	oklch(58.64% 0.114 231.9)
XYZ	xyz(17.2081, 20.7804, 46.2752)
Luminance	0.2078 (WCAG relative)
Temperature	cool
Family	cyan

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#1587B4 #B44215

analogous

#15B492 #1587B4 #1538B4

triadic

#1587B4 #B41587 #87B415

tetradic

#1587B4 #9215B4 #B44215 #38B415

square

#1587B4 #9215B4 #B44215 #38B415

split-complementary

#1587B4 #B41538 #B49215

monochromatic

#083546 #0F5E7D #1587B4 #21AEE5 #58C2EC

Accessibility & contrast

On white

4.07

#1587B4 on #FFFFFF

AA ✗AA large ✓AAA ✗

On black

5.16

#1587B4 on #000000

AA ✓AA large ✓AAA ✗

Best text color

#000000 on #1587B4

5.16:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##1587B4	#FFFFFF	#000000	##000000
##1587B4	1.00	4.07	5.16	5.16
#FFFFFF	4.07	1.00	21.00	21.00
#000000	5.16	21.00	1.00	1.00
##000000	5.16	21.00	1.00	1.00

Color blindness preview

Protanopia (red-blind)

#7086B6

Deuteranopia (green-blind)

#5C78B3

Tritanopia (blue-blind)

#009396

Achromatopsia (no color)

#7E7E7E

Design tokens & code

CSS

--color: #1587b4;
/* rgb */ color: rgb(21, 135, 180);
/* oklch */ color: oklch(58.6% 0.114 231.9);

Tailwind

colors: {
  custom: {
    50: '#73aaca',
    500: '#1587b4',
    950: '#000000',
  },
}

SCSS

$custom: #1587b4;
$custom-light: #73aaca;
$custom-dark: #000000;

JSON

{
  "hex": "#1587b4",
  "rgb": {
    "r": 21,
    "g": 135,
    "b": 180
  },
  "hsl": {
    "h": 196.981,
    "s": 79.104,
    "l": 39.412
  },
  "oklch": {
    "l": 0.58635,
    "c": 0.11449,
    "h": 231.9
  },
  "luminance": 0.20783
}

Semantic roles & 50–950 ramp

primary

#1587B4

secondary

#CF7856

accent

#6A32F6

background

#F7FAFC

surface

#EEF4F8

border

#C9CED1

text

#0A1013

muted

#7C7F82

Preview Lab

Preview with #1587B4

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

Preview Lab → · Contrast checker → · Palette generator →