#2559A8#2559A8

#2559A8 is a mid, vivid blue. Relative luminance 0.104; OKLCH L 47.3% C 0.139 H 258.8°. Best body text is #FFFFFF at 6.83:1 contrast (WCAG AA passes).

Color values

HEX	#2559A8
RGB	rgb(37, 89, 168)
HSL	hsl(216, 64%, 40%)
HSV	hsv(216, 78%, 66%)
CMYK	cmyk(78%, 47%, 0%, 34.1%)
CIE-LAB	lab(38.49, 11.72, -47.41)
CIE-LCH	lch(38.49, 48.83, 283.89°)
OKLab	oklab(47.33% -0.0269 -0.1361)
OKLCH	oklch(47.33% 0.139 258.8)
XYZ	xyz(11.4006, 10.3639, 38.4378)
Luminance	0.1037 (WCAG relative)
Temperature	cool
Family	blue

Closest named colors

Perceptual scales

Shades

Tints

Tones

OKLCH scale

Color harmonies

complementary

#2559A8 #A87425

analogous

#259AA8 #2559A8 #3225A8

triadic

#2559A8 #A82559 #59A825

tetradic

#2559A8 #A8259A #A87425 #25A832

square

#2559A8 #A8259A #A87425 #25A832

split-complementary

#2559A8 #A83225 #9AA825

monochromatic

#0F2444 #1A3E76 #2559A8 #3775D3 #6998DE

Accessibility & contrast

On white

6.83

#2559A8 on #FFFFFF

AA ✓AA large ✓AAA ✗

On black

3.07

#2559A8 on #000000

AA ✗AA large ✓AAA ✗

Best text color

#FFFFFF on #2559A8

6.83:1 — WCAG AA (normal text) passes

Contrast matrix

fg \ bg	##2559A8	#FFFFFF	#000000	##FFFFFF
##2559A8	1.00	6.83	3.07	6.83
#FFFFFF	6.83	1.00	21.00	1.00
#000000	3.07	21.00	1.00	21.00
##FFFFFF	6.83	1.00	21.00	1.00

Color blindness preview

Protanopia (red-blind)

#2E61AB

Deuteranopia (green-blind)

#0B55A6

Tritanopia (blue-blind)

#006C78

Achromatopsia (no color)

#5B5B5B

Design tokens & code

CSS

--color: #2559a8;
/* rgb */ color: rgb(37, 89, 168);
/* oklch */ color: oklch(47.3% 0.139 258.8);

Tailwind

colors: {
  custom: {
    50: '#7387c2',
    500: '#2559a8',
    950: '#000000',
  },
}

SCSS

$custom: #2559a8;
$custom-light: #7387c2;
$custom-dark: #000000;

JSON

{
  "hex": "#2559a8",
  "rgb": {
    "r": 37,
    "g": 89,
    "b": 168
  },
  "hsl": {
    "h": 216.183,
    "s": 63.902,
    "l": 40.196
  },
  "oklch": {
    "l": 0.47332,
    "c": 0.13869,
    "h": 258.8
  },
  "luminance": 0.10365
}

Semantic roles & 50–950 ramp

primary

#2559A8

secondary

#C49E65

accent

#A541E7

background

#F7F8FC

surface

#EEEFF8

border

#C9CAD1

text

#090B12

muted

#7B7C81

Preview Lab

Preview with #2559A8

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

Preview Lab → · Contrast checker → · Palette generator →